# Description

Opamp Calculator for electronic engineers, hobbyists and students.

Feature list:

- Inverting Amplifier

- Non inverting Amplifier

- Differential Amplifier

- Inverting Summing Amplifier

- Summing Amplifier

LIKE and Share us:

Google+: http://gplus.to/androiddesignnl

You must install this app before submitting a review.

Google Play reviews now use Google+ so it's easier to see opinions from people you care about. New reviews will be publicly linked to your Google+ profile. Your name on previous reviews now appears as "A Google User".

Write a review

My review

Review from

# Reviews

Helpfulness

Newest

Rating

Helpfulness

All Versions

All Versions

Latest Version

4.1

166 total

5 81

4 45

3 25

2 7

1 8

Christopher Lenon

Output voltage The output voltage is incorrect when the configuration is set up to make the output rail. The voltage would only reach the rail voltage minus 1.4 volts. So you would be looking at an output of about positive or negative 13.6 volts. Other than that, it is a decent app.

TUHIN SUBHRA Das

Fine It's very good app for biggner & graduation students .Special thanks to the builders.

User reviews

Great tool Thank you to the developer for making an excellent program free

# What's New

Changed the layout

# Additional information

Updated

August 24, 2014

Size

1.5M

Installs

10,000 - 50,000

Current Version

2.60

Requires Android

2.3 and up

Content Rating

Everyone

Permissions

Report

Flag as inappropriate Offered By

android-design.nl

Developer

# Similar

## Mechanical Engineering Toolbox

Mechanical Engineering Toolbox v1.2

*** Android Lollipop (5.0) supported - 19 October 2014 ***

*** Electrical Power Calculator is added and UI slightly changed in 29 April 2014 ***

*** Power-Torque calculation error is fixed in 07 Dec 2013***

This program is the free version of the Mechanical Engineering Toolbox.

This program is designed to help you in daily mechanical engineering problems that you may encounter.

It is not only prepared for the mechanical engineers, but also for naval architects, civil engineers, HVAC engineers, electrical engineers and for all engineers that use some common unit conversions and math.

It has a very simple user interface for you to be able to use in the field.

It is selected among the Top Ten Productivity Applications for Engineers by the www.engineerjobs.com.

http://www.engineerjobs.com/magazine/2014/10-best-android-apps-for-engineers.htm

For now the program has the following modules:

- Unit Conversion in 74 unit types, more than 1000 units

- ISO Fits and Tolerances Calculation according to ISO 286-2

- Hardness Conversion between 22 hardness types according to ASTM E140

- Material Properties of 74 commonly used materials (more will be added)

- Trigonometric Calculations

- Beam Load Calculation of 19 different loading conditions

- Torque-Power Conversion

- Steel Bolt Specs.

- Bolt Torque Calculation

- Pipe Sizes

- Electrical Power Calculator

Keywords: mechanical, engineering, toolbox, naval, architect, architecture, hvac, electrical, math, mathematics, engineer, calculation, calculator, civil, unit, conversion, converter

## Calculator Plus

USA TODAY named Calculator Plus among its "25 Essential Apps", calling it the "handy calculator app that's garnered great user ratings"

I'm Calculator Plus - the perfect calculator for Android. I'm easy to use and beautifully designed to do things better than your phone or handheld calculator ever did.

I'm big, easy to read, and I love saving you time and effort. I remember everything you calculate, and let you review it anytime, making me perfect for shopping, doing homework, balancing checkbooks, or even helping with taxes. And if you need to quit and go do something else, I'll have it all waiting for you when you come back. You'll never need to type the same calculation twice again.

I'm attractive and effective and I make great use of your big, beautiful display:

- I show your calculations in clear, elegant type that's easy to read, with commas just where they should be

- You'll never lose track of where you are in a calculation - I show you exactly what's happening at all times

- I remember everything, so you can take a break, then come back later and pick up where you left off

- You can use backspace anytime to correct a simple mistake, instead of starting over

- Use memory to keep a running total you can actually see

- Swipe memory keys aside if you need more advanced math functions

- My percentage key shows exactly what it did, so you're not left confused

- My intuitive, lovable design makes it simple to do everyday calculations on your phone or tablet

Let Calculator Plus on your phone or tablet finally put that handheld calculator to rest.

## AutoCAD 360

Autodesk® AutoCAD 360—formerly AutoCAD WS—is the official AutoCAD® mobile app.

AutoCAD 360 is a free*, easy-to-use drawing and drafting mobile app that allows you to view, edit, and share AutoCAD drawings—anytime, anywhere. Simplify site visits and fieldwork with powerful design review and markup tools—available online and offline. Seamlessly share drawings with others across desktop, web, and mobile devices. Easily access drawings from web browsers using the free companion AutoCAD 360 web app. AutoCAD 360 Pro subscription plans further expand the functionality of the app, bringing additional capabilities to the field.

View

• Open 2D and 3D DWG drawings uploaded to your free* AutoCAD 360 online account

• Work offline, then easily upload changes when you are back online

• Upload and open files directly from email on your device

• See all aspects of your DWG file, including external references, layers, and image underlays

• Use multi-touch zoom and pan to easily navigate large drawings

• Use your device’s GPS to orient yourself within a drawing

Edit

• Draw and edit shapes with accuracy using Snap

• Select, move, rotate, and scale objects

• Add and edit text annotations directly on your drawing; no need for paper mark-ups

• Validate distance measurements in the drawing while you are onsite

• Save edits to your AutoCAD 360 online workspace, so your drawings stay up to date

Share

• Share your designs with others directly from the mobile app

• Add comments and images and invite responses using the Design Feed

• Print remotely from your mobile device using HP’s ePrint & Share service

• Plot your designs to PDF or DWF and share them via email

AutoCAD 360 Pro Subscription Plans

AutoCAD 360 is free* to download and use. AutoCAD 360 Pro subscription plans allow you to get much more out of the app, enabling:

• New drawing creation

• Larger file size support

• Connectivity to third-party storage, including Dropbox, Box, and more

• Advanced layer management

• Properties and attributes

• Block libraries

• Drawing coordinates

• Priority support

• Increased storage space

• New tools and much more

AutoCAD 360 Pro subscription plans are available in the following options:

• AutoCAD 360 Pro monthly for $4.99

• AutoCAD 360 Pro annually for $49.99 (save $9.89 vs. monthly membership)

• AutoCAD 360 Pro Plus annually for $99.99

Subscriptions will be charged to your credit card through your Google Play account. Your subscription will automatically renew unless cancelled at least 24-hours before the end of the current period. You will not be able to cancel a subscription during the active period. You can manage your subscriptions in your Account Settings after purchase.

* Free products and services are subject to the Autodesk, Inc. terms of use that accompany them.

Terms of use: http://usa.autodesk.com/adsk/servlet/item?siteID=123112&id=21310328

Privacy policy: http://usa.autodesk.com/privacy/

## palmDraft(lite) ElectronicsCAD

Electronic schematic drawing application for Android.

* Please note this is the lite version of palmDraft. If you like it and would like to support further development you can purchase the full version from the Google Play Market.

The full version has these additional features:

* Work with larger schematics (1080 x 720 and 1920 x 1080).

* Export blocks.

* Use of custom symbols.

* Export schematics to camera roll.

* Share schematics (gmail, etc.)

* More library symbols.

Originally designed for palm(tm) OS PDAs back in 2002, palmDraft is now available for the Android platform so you can easily design your own professional-looking electronic schematic diagrams on your Android tablet or phone.

This is a bitmap-based CAD, featuring a high definition, flick-panning, pinch-zoom-able working canvas optimized for finger and pen drawing. It's as easy to manipulate as a sheet of paper. The schematics file format is standard .PNG bitmap file format which can be easily exported and shared for printing.

HARDWARE REQUIREMENTS:

Designed for high-density screen devices, tablet or large screen device recommended for best experience.

* For older devices with low screen densities (which have lower heap size), if you get low-memory warnings, please disable dark-background in prefs screen and work with SMALL or MEDIUM sized schematics (minimum 32MB of Heap memory.)

Basic Features:

* Schematics in SMALL:720x480, MEDIUM:1080x720 and LARGE:1920x1080 sizes

(Lite version saves only in 720x480)

* Free pinch-zooming and panning of the canvas on all editing modes.

* Grid snapping for easy and accurate finger operation.

* Schematics are saved and edited in standard .PNG format.

* Copy, delete, move, flip and rotate blocks, text and objects.

* Block Export and Import (full version only).

* Built-in basic electronic, electric, network, analog and digital symbols.

* Import custom made symbols and I.C.s (Full version only).

* Landscape and portrait modes.

* Working canvas available in dark or light theme (Prefs).

## Handyman Calculator

Kalyani

1

Complete construction calculator with simple inputs. The app for construction! Reduce Waste, Save Time and Money! Well tested by half a million contractors and home owners! Top 100 productivity app. Give it a try!

Calculate materials, track time spent on projects, and save calculations to a notepad.

Listed in "This Old House" magazine "The TOH Top 100: Best New Home Products 2013": http://www.thisoldhouse.com/toh/photos/0,,20753086_30049018,00.html

Bob Vila newsletter: http://www.bobvila.com/blogs/renovation-app/

http://www.bobvila.com/best-app-for-home-design-inspiration/47970-new-notable-10-digital-tools-to-help-you-diy-your-dream-home/slideshows?bv=wn#!9

Real Estate Radio: http://calltoni.com/listen-now-jakes-tech-corner-with-noah-ickowit-9-7-13/

Time Tracking tool

To-do list

Feet and Inches Calculator

Woodworker Calculators

Electrical calculators

Metric units arithmetic

Feet,inches TO Metre,cm,mm Converter

Fraction Calculator

Fraction Simplification

Square Footage Calculator

Cubic Footage Calculator

Lumber, Concrete and Asphalt calculator.

Length, Area and Weight Converter.

Temperature Converter

Density Converter

Feet and Inches Calculator

Board Foot Calculator

Board feet and Linear feet Converter

Lumber Weight Calculator

Deck Baluster Calculator

Deck Board Calculator

Spacing Calculator

Wall Framing Calculator

Firewood Calculator and BTU Chart

Lumber Log Volume calculator

Concrete, Brick, Block, Mortar and Sand Calculations

Excavation Calculator

Asphalt Volume calculator

Aggregate Calculator

Drywall calculator

Crown Molding Calculator

Carpet Calculator

Laminate Flooring Calculator

Wall Paper Calculator

Tile Calculator

Paint Calculator

Stairs Calculator

Arc Length Calculator

Air Conditioning and Heater Calculator

Roof Calculator

Roof Pitch Angle Chart

Rafter Length Calc

Rebar Weight Chart

Mulch and Topsoil Calculator

Patio Pavers Calculator

Brick Calculator

Plants Calculator.

Wood Fence Calculator

Grass Seed Calculator

Sod Calculator

Blown Insulation R value Calculator

Golden Ratio(Golden mean) Calculator

Speed, Distance and Time Calculator

Rain water Collection Calculator

Loan Calculator

Speed and Velocity Unit Converter

Water Flow Rate Calculator.

Tank Capacity Calculator

Ohm's Law Calculator

Resistor Color Code Calculator

Resistance Conversion

Power Calculator

Amps to Watts Calculator

Capacitance, Frequency, Inductance and Resistance Calculator

Voltage Drop and divider Calculator

Wire Size Calculator

Power Wash Calculator

Sine Bar Calculator

Wrench Conversion Chart

Decimal and Fraction Converter

Diagonal calculator

Slope Calculator

Right Triangle Calculator

Rectangle Calculator

Square Calculator

Circle Calculator

Polygon Calculator

Fraction to Percentage Calculator

Angle Converter

Power Converter

Energy Converter

Torque Converter

Force Units Converter

Liquid Units Converter

Pressure Units Converter

Magnetic Flux Converter

Volume FlowRate Units Converter

Degrees, Minutes, Seconds and Decimal Degrees Conversion

BMI Calculator

Miles Per Gallon (MPG) Calculator

Kilometers Per Litres Calculator

Gas and Oil mixture Ratio Calculator

Discount Calculator

Date Duration Calculator

Tip Calculator

Graphing Calculator

PCB Trace Width Calculator

World Clock

Shipment Density Calculator

Currency Converter

Oil Drilling Calculators:

Mud Pump Output(PO)

Pressure Gradient

Pressure to Mud Weight Conv.

Specific Gravity Calc.

Equivalent Circulating Density

Maximum Allowable Mud Weight

Annular Velocity

Hydraulic Horsepower(HHP)

Formation Temperature (FT)

Buoyancy factor

Refrigerant Pressure Temperature Chart

Percent Grade to Degrees Converter

Percent Grade Calculator

Mowing Calculator

Electric Charge Converter

Fuel Consumption Converter

Enthalpy Conversion

Led Resistor Calculator including Series and Parallel

Frequency, Wavelength and Energy Converter

Milling Machine calcs

Tap and Drill Chart

Woodturners Segment Calculator

Lumens to Watts Calculator

Metal detector

## PICmicro Database

Iero

1

PICmicro database allow you to check the characteristics of all the PIC and dsPIC microcontrollers produced by Microchip.

You can search for your favorite microcontroller, reading the features, applying filters, and many new features will be introduced in future versions...

The application integrates seamlessly with the program ElectroDroid which can be downloaded for free from the Android Market. Get ElectroDroid "Donate" to remove ads.

PIC® Microcontrollers (MCUs) and dsPIC® Digital Signal Controllers (DSCs) are registered trademark of Microchip Technology Inc. This application is not related or affiliated in any way with Microchip Technology Inc.

## Electronics Calculator

Simple electronics tools & calculators for your DIY projects.

Tools:

- Resistor Color Code (4,5 &6 band)

- Capacitor Conversion Calculator & Table

- Capacitor Code Converter (code to values - vica versa)

- Resistor in Series & Parallel

- Capacitor in Series & Parallel

More tools, converter and calculator will be updated soon.

## Construction Calculator

C-Calc is a calculator application designed by, and for construction workers or anyone else who works with measurements in feet and inches. C-Calc is a full function calculator that works as a standard calculator but more importantly allows you to work in feet, inches, fractional inches, meter, centimetres, and millimetres. Features include;

- add, subtract, multiply, divide, power, root, and more with measurements in feet, inches, and fractional inches

- reduce fractions and fractional inches to their lowest common denominator

- full memory feature including add, subtract, set, recall, and clear

- split screen shows decimal value, feet/inch value, memory, and settings all at once in large easy to read fonts

- calculate square and cubic footage easily

- full instructions and video tutorial available at www.snappyappz.com

## CAD Touch

cadTouch is a PRO CAD solution that completely reinvents on-site drawing, giving to professionals in various core fields like architecture, engineering, real estate, home design, and more, the power to measure, draw and view their work on-site.

cadTouch is really easy to use and it's fast multitouch interface will give you the precision and flexibility that pen and paper fail to archive, finally you will have the perfect on-the-go companion for desktop software like AutoCAD™, SketchUp™ or Solidworks™ and every other DWG/DXF compatible app.

cadTouch supports every DWG (up to AutoCAD™ 2013) entities for viewing and editing as it uses industry-proof input/output DWG importers, and you can draw new lines, polylines, rectangles, circles, arcs, points (also by xyz coords), hatches, texts, smart/angular dimensions, sketches, revision clouds, raster image, ruler, move, rotate, scale, trim, delete, mirror, offset, group, explode, grips, OSNAP, line/patterns type, alignments guides, objects library, preloaded library with 20+ blocks, customizable library, info tool to query length/perimeter/area, layers, black or white background and many more features.

Complete support for decimal and imperial measure units (architectural feet and inches).

cadTouch requires no internet connection, no subscription.

cadTouch is a DWG/DXF drawings 2D editor and 2D/3D viewer, you can open, share and save your work in DWG, PDF and PNG (Pro version only).

This free version has no limitations in tool power and is bound with five tutorials so you can easily try and learn cadTouch in a few minutes.

A screen size of at least 4.0" is recommended (stylus is not necessary, but is well supported by cadTouch).

Please remember to close other apps before running cadTouch (to free RAM).

If you like cadTouch, leave a constructive review, a positive review ensures that we develop the app with more updates and new features, if you are facing errors or bugs please contact us instead of leaving a review at support@cadtouch.com, it's important so we can fix errors, thank you.

## Handy Construction Calculators

Android's Most Trusted Construction Calculator

70+ Professional Grade, Premium Tools

Full US or METRIC modes - Inputs and Outputs

70+ Professional Grade, Premium Tools

Full US or METRIC modes - Inputs and Outputs

Google Play Featured - DIY App

Featured by AT&T, Vodafone

15,000+ customers, Top 100 Productivity App

"Best in Class" reviews -

The Best Android Construction Mobile Apps - getapp.com

3 Killer Android Home Improvement Apps - appshappens.com

HammerTime - poptechjam.com

Precision Inputs and Outputs

-US (Feet Inches Fraction)

-METRIC (Meter Millimeter)

What makes us better?

*US or METRIC modes - one simple setting lets you switch between modes with localized materials, size choices, inputs, outputs and rounding

*Configurable US inch fraction output precision (1/32, 1/16, 1/8, 1/4)

*Easy to use

*Flexible inputs/outputs - advanced options, no need for mental math

*Experience - Since 2009 built with the input of hundreds of professionals

*Professional grade calculator - for the Pro, Contractor, Builder, Estimator, Handyman, DIY, Home Improvement or Carpenter

*Diagrams help master the inputs and outputs - no guesswork

*Built-in results sharing - text, email, copy/paste and more

*Clean and easy to use - no ads, crazy designs or other annoyances

*Consistently updated and supported

*We appreciate our customers. Have an idea or special need? Send us a note anytime!

Satisfaction Guaranteed!

Below is a list of our 70+ construction calculators along with a few highlights to show the advanced features, inputs and outputs that we think make us the best for your construction projects.

= ROOFING

* Attic Ventilation - Ventilation, Intake & Exhaust

* Advanced Rafters - Overhang, Ridge, Bird's Mouth, Common

* Simple Rafters

* Roofing Calculator - Gables, Drip Edge, Ridge Caps, Bundles, Underlayment

* Sheeting

= FRAMING

* Balusters - Rake Angle, Centers, Spacing, Running Measurements

* Board Feet

* Floor Joists - OC Spacing, Running Measurements

* Wall Framing Calculator - Stud spacing, Studs & Plates, Advanced Algorithm

* Insulation - Batts & Blown

* Siding - Gables

* Squaring

* Stair Calculator - Constrain Run, Adjust Riser Results Realtime, Running Stringer Points

= WALL, FLOOR & CEILING

* Carpet & Vinyl Flooring

* Tongue & Groove Flooring

* Crown Molding

* Deck Boards - Diagonal & 90 Degree Layouts

* Demolition Waste - Building Type

* Drop Ceiling - Even Border Construction, All Materials

* Drywall Calculator - Room Dimension or Area, Ceiling, All Materials

* Finish Areas - Walls, Floor, Ceiling

* Paint - # Coats, Wall Type

* Tile Calculator - Field and Border, Diagonal or 90 Degree Layouts

= ELECTRICAL CALCULATOR

* Amps/Watts/Volts Solver

* Amps Required for Circuit

= FOUNDATION

* Backfill - Volume & Weight and Slope

* Excavation and Backfill - Specific excavated (with swell) and backfill (with compaction) material selection. Includes calculators specific to Basements, Footings and Trenches.

* Grade - Run/Drop or Slope

* Rebar Calculator - Beams & Columns with variable sizing and ties, Continuous footings, Weight.

= PAVING & CONCRETE

* Round/Rectangle Concrete Calculator - Total Volume, Premix and Portland Options, Rebar

* Post Holes - Per Column & Total Calculations

* Asphalt Calculator - Variable Base Weight

* Paving Calculator - Variable Base, Subbase, Compaction

* Wire Mesh

= MASONRY

* Brick & Block Wall Calculator - Bricks, Courses, w/wo Mortar

= AREA, VOLUME & ANGLE

* Acreage

* Arc

* Arc Radius

* Cone

* Circle

* Cube

* Cylinder

* Pyramid

* Rectangle

* Rise/Run/Angle

* Sphere

* Trapezoid

* Triangle

= MEASUREMENT

* Tape Measure Feet Inches Calculator

* GPS Measure (experimental) - Measure one point to another

* Drill Bit & Pilot Hole Conversion

= LANDSCAPING

* Aggregate Calculator - Rectangle/Round - Variable Materials & Densities

* Drainage - Rational Equation

= BUSINESS

* Sq/Linear Ft Construction Cost Estimator

* Discount

* Margin & Gross Profit - Customer Price, Markup Profit, Project Overhead, Company Overhead

* Overtime - Regular, Overtime & Gross Pay

* Sales Tax

* Task Time

* Travel Time

## Calculator Widget

A customizable calculator widget for your homescreen.

Features Include:

★ Themes, currently 4 to choose from but suggestions are welcome for new ones.

★ Large (4x4) and small (3x3) widget sizes

★ Button to toggle between number and function keys

★ Customizable text colors

★ Edit Mode for advanced input

★ and more

-More Information-

There is an F.A.Q. at the bottom of the settings screen that comes up when placing a widget. If you have a question that is not covered there, use the Contact Support button at the bottom of the F.A.Q. to contact me.

-Edit Mode-

This widget can handle more types of input than there is room to put buttons for. To overcome this, you can tap on the display to go into Edit Mode. From here you can copy/paste text, use your hardware or software keyboard, and input functions that are not included in the widget buttons.

For example, the widget contains a button for tangent but not for arctangent. To use arctangent, you can tap on the display and use your keyboard to type "atan". You can then continue to type in edit mode or click done to return to the widget and finish typing there.

## Indian Steel Table

This application makes IS 808 Steel Table is available on finger tip. Very useful for structural designer / engineer for project estimate and supervision.

We have covered Four type of steel sections. Those are Equal Angles, Beam. Channel and Pipe. These sections are widely used for structural steel fabrication.

We have covered Four type of steel sections. Those are Equal Angles, Beam. Channel and Pipe. These sections are widely used for structural steel fabrication.

Keyword: Civil Engineering, Handbook, Structural Engineering.

Data includes Weight per meter, Moment of Inertia , Cross sectional area, Thickness of sections Etc.

## Calculator SmartWatch

Shuisky

1

Calculator for Sony SmartWatch 2.

Supports addition, subtraction, multiplication, division, power, square root, sin, cos, tan, arcsin, arccos, arctan, logarithm, percentage. Memory operations: MC, M+, M-, MR (only SmartWatch 2).

Supports addition, subtraction, multiplication, division, power, square root, sin, cos, tan, arcsin, arccos, arctan, logarithm, percentage. Memory operations: MC, M+, M-, MR (only SmartWatch 2).

Widget for launch app from watch-face!

Controls:

• Press and hold to use the orange functions;

• Press "Back" button to delete last symbol;

• Press "Menu" button to delete all symbols;

• Swipe left/right to change the displayed functions.

Smart Connect bug: If you do not see this app in the list of programs inside Smart Connect, go to Settings->Apps and 'Clear data' of 'Smart Connect' and 'SmartWatch 2' apps.

If you find any bugs or you have any suggestions, please email me at shuisky@gmail.com in order to correct or implement it.

Smart extension for SmartWatch 2

Smart Connect extension for SmartWatch 2 productivity

LiveWare™ extension for SmartWatch

## Civil Engineering Pack

574 Calculators & Converters related to Civil, Beams, Columns, Piling, Concrete, Survey, Soil & Earthwork, Structural Engineering, Bridges, Highway & Road, Hydraulics and Timber.

*** Available in Metric and Imperial Units ***

*** Available in English, Français, Español, Italiano, Deutsch & Português ***

Civil Engineering Pack contains 574 calculators and converters, that can quickly and easily calculate and convert different civil engineering parameters. Automatic and accurate calculations and conversions with every unit and value changes. Most comprehensive civil engineering and construction calculator.

Civil Engineering Pack contains the following 12 modules:

• Beam Calculator

• Column Calculator

• Piles and Piling Calculator

• Concrete Calculator

• Engineering Survey Calculator

• Soil and Earthwork Calculator

• Structural Engineering Calculator

• Bridge Calculator

• Highway and Road Calculator

• Hydraulics and Waterworks Calculator

• Timber Engineering Calculator

• Unit Converter

* Beam Calculator contains 34 Calculators that can quickly and easily calculate different Beam parameters.

* Column Calculator contains 35 Calculators that can quickly and easily calculate different Column parameters.

* Piles & Piling Calculator contains 22 Calculators that can quickly and easily calculate different Piles and Piling parameters.

* Concrete Calculator contains 56 Calculators that can quickly and easily calculate different Concrete parameters.

* Engineering Survey Calculator contains 33 Calculators that can quickly and easily calculate different Surveying parameters.

* Soil & Earthwork Calculator contains 60 Calculators that can quickly and easily calculate different Soil and Earthwork parameters.

* Structural Engineering Calculator contains 58 Calculators that can quickly and easily calculate different Structural Engineering parameters.

* Bridge Calculator contains 58 Calculators that can quickly and easily calculate different Bridge and Suspension Cable parameters.

* Highway & Road Calculator contains 37 Calculators that can quickly and easily calculate different Highway and Road parameters.

* Hydraulics & Waterworks Calculator contains 94 Calculators that can quickly and easily calculate different Hydraulics and Waterworks parameters.

* Timber Engineering Calculator contains 55 Calculators that can quickly and easily calculate different Timber Engineering parameters.

Unit Converter contains following 32 Converters:

• Acceleration

• Angle

• Area

• Density

• Energy/Work

• Flow Rate (Mass)

• Flow Rate (Volume)

• Fluid

• Force

• Frequency

• Hardness

• Length

• Mass

• Metric Weight

• Metrology

• Moment of Force

• Moment of Inertia

• Prefixes

• Pressure

• Radiation

• Specific Heat Capacity

• Specific Volume

• Temperature

• Thermal Conductivity

• Thermal Expansion

• Time

• Torque

• Velocity

• Viscosity (Dynamic)

• Viscosity (Oil & Water)

• Viscosity (Kinematic)

• Volume

Key Features:

• All calculators are available both in SI Units (Metric System) and USCS Units (Imperial System).

• Complete coverage of calculators and converters in civil engineering and construction parameters.

• Automatic calculation and conversion of the output with respect to changes in the input, options and units.

• Formulas are provided for each calculator.

• Extremely accurate calculations and conversions.

• Professionally and newly designed user interface that speeds up data entry, easy viewing and calculation speed.

Most Comprehensive Civil and Construction Calculator Pack

## RealCalc Scientific Calculator

Android's #1 Scientific Calculator. A fully featured scientific calculator which looks and operates like the real thing.

Looking for fractions? Degrees/minutes/seconds? Landscape mode? You need RealCalc Plus. See elsewhere on this page for the link, or select 'Upgrade' from the RealCalc menu.

RealCalc includes the following features:

* Traditional algebraic or RPN operation

* Unit conversions

* Physical constants table

* Percentages

* Result history

* 10 memories

* Binary, octal, and hexadecimal (can be enabled in Settings)

* Trig functions in degrees, radians or grads

* Scientific, engineering and fixed-point display modes

* 7-segment, dot-matrix or standard font display

* Configurable digit grouping and decimal point

* Full built-in help

* A complete lack of advertising

RealCalc Plus contains all these features, plus:

* Fraction calculations and conversion to/from decimal

* Degrees/minutes/seconds calculations and conversion

* Landscape mode

* 12-digit display

* Extended internal precision (32-digit)

* User-customizable unit conversions

* User-customizable constants

* New RPN styles (buffered-entry, XYZT rolling stack)

If you find RealCalc useful, please consider purchasing RealCalc Plus to support further development. Thank you.

FAQ:

* If you want data size conversions in multiples of 1024, use kibibytes, mebibytes, gibibytes, etc - see en.wikipedia.org/wiki/Kibibyte.

* If you can't find HEX, BIN or OCT modes, go to Menu > Settings and make sure that 'Radix Modes' is checked.

* If the percent key appears to give wrong answers, make sure you are pressing '=' at the end, e.g. '25 + 10 % =' will give 27.5.

* If sin/cos/tan functions don't give the answer you are expecting, make sure you are in the correct angle mode. Degrees, radians and grads are supported, indicated by DEG, RAD, GRAD in the display. Use the DRG key to change mode.

* If any of the digit keys are disabled, or the decimal point doesn't work, or you have answers with letters in, or basic arithmetic appears to be wrong, then you are in binary, octal or hexadecimal mode. Press DEC to return to decimal operation. If you don't need these modes, please make sure that 'Radix Modes' is disabled in the settings.

Please read the help for more information.

## Volt / Amp / Watt Calculator

CrawTek

1

Input any two values of Voltage (V), Amperage (A), Wattage (W), or Ohms (Ω) to find the other two missing values.

Want a feature to be added?

Let me know at Apps@CrawTek.com

Reviews

If you leave less than a 4 star review please tell me why, I can't make the app better if you think its a one star app and don't tell me how I can improve it or what you think it is missing. Thank you.

I have been getting a lot of 1 star ratings for the app permissions. Let me explain them to you.

Photos/Media/Files - This is a requirement for any app that saves information to your phone. My app does not access any of your personal files it only saves if you have rated the app or not. If you rate the app it will save that information and never ask you to rate it again.

Wi-Fi connection information - Because my app asks you if you will rate it periodicity, it needs internet access to connect you to the play store to rate the app if you choose to.

Device ID & call information - This is required by Google to ensure the app is installed to the device it was download for.

# More from developer

## Resistor Color Code

This is by far the fastest and most easy Resistor Color Code calculator.

Calculate resistor value by selecting the band colors.

Or Reverse:

Enter a resistor value and find the color code.

If the value is not an standard E-series value the two nearest values are shown.

* 3, 4, 5 and 6 band resistor support *

If the resistor has a standard E-series value then also the E-series (E3, E6,E12, E24, E48, E96, E192) number will be shown.

App for resistor SMD code: http://play.google.com/store/apps/details?id=mwave.resistor_smd_code

LIKE and Share us:

Google+: http://gplus.to/androiddesignnl

## RF & Microwave Toolbox

High frequency electronics toolbox for Microwave designers, RF professionals, EMC technicians, radio-amateur, students, astronomer and electronic hobbyists.

If the reviews are not visible please use this link:

http://play.google.com/store/apps/details?id=mwave.mwcalculator_pro&hl=en

LIKE and SHARE us:

Facebook: http://www.facebook.com/androiddesignnl

Google+: http://gplus.to/androiddesignnl

With the following tools:

(This Toolbox contains also all the tools of the Analog ElectronicToolbox, PCB Trace Calculator and Resistor Color Code Calculator.)

1) Noise floor (Kelvin,dBm)

2) Amplifier cascade (NF, Gain, P1db, OIP2, OIP3)

3) Radar equation (2-way path loss)

4) Radio equation (1-way path loss)

5) Power and voltage converter (W,dBm,V,dBµV)

6) Field intensity and power density converter (W/m2, V/m, A/m, Tesla, Gauss,dBm, W)

7) Mismatch error limits (VSWR, Return loss)

8) Reflectometer (VSWR, Return loss)

9) Mitered Bend

10) Divider and Couplers (Wilkinson, Rat race, Branchline , microstrip and lumped)

11) Balanced and und balanced PI and T attenuator

12) Skin depth (DC and AC resistance)

13) PCB Trace calculator (impedance/dimensions)

- Microstrip

- Stripline

- Coplanar waveguide

- Coupled microstrip

- Coupled stripline

14) Image rejection (amplitude and phase imbalance)

15) Mixer harmonics (up and down convertion)

16) Helical antenna

17) Peak to RMS (peak, RMS, average, CF)

18) Air Core Inductor Inductance

19) Parallel plate Capacitor

20) PI and T attenuator

21) Ohm's Law

22) Parallel LCR impedance/resonance

23) Series LCR impedance/resonance

24) Inductor impedance

25) Capacitance impedance

26) Antenna temperature (Kelvin)

27) Radar Cross Section (RCS) calculator (Sphere,Cylinder, flat plate, corners, dBsm)

28) Noise Figure Y-Factor Methode

29) EMC (EIRP, ERP, dBµV/m)

30) Noise figure converter (dB, linear, Kelvin)

31) Frequency Band Designations (IEEE Radar band, Military Radar band, Radio band, Satellite, Waveguide band)

32) Resistor color code (reverse lookup, 3 to 6 band)

33) Filter Design (Butterworth, Chebyshev, prototype):

- Low pass

- High pass filter

- Band pass

- Band stop filter

34) µ-Filter Design (microstrip, stripline):

- Interchange of Circuits

- Kuroda's Identities

- Series and Shunt Circuit lines

- Coupled line Circuits

- Stepped Impedance

35) PCB Trace Width and Clearance Calculator

36) Series and Parallel component (R, L and C) calculations.

37) Reverse Series and Parallel resistor calculations.

38) Inductor Color Code Calculator.

39) Capacitor Charge Calculator.

40) Led Resistor Calculator.

41) Voltage Divider Calculator.

42) Thin Film Resistor Calculator (Trim and non Trim)

43) Opamp Calculator

44) Lumped Balun Calculator

45) Wavelength calculator

46) L-Network Matching Calculator

47) LCR Parallel - Series Conversion Calculator

48) PI & T-Network Matching Calculator

49) Coax Line Calculator

50) Twisted pair Calculator

51) Lumped-Distributed Equivalences calculator

52) Fresnel Calculator

53) Inductor Charge Calculator.

54) Heat Sink temperature calculator

55) Thermal via calculator

56) Coupler directivity calculator

57) Cavity resonance calculator

58) Resistor SMD Code calculator

59) Waveguide calculator

60) Lumped phase shifter calculator

61) Series section impedance matching transformers

- Series section transformer

- Quarterwave transformer

- Bramham (12th wave) transformer

- Regier transformer

62) Power (dBm) add calculator

63) Doherty PA calculator

Please let me know if there are Electronic and RF & Microwave related tools that you would like to be added.

You can send me an email for a feature request.

## RF & Microwave Toolbox lite

High frequency electronics toolbox for Microwave engineers, RF professionals, EMC technicians, radio-amateur,students, astronomer and electronic hobbyists.

LIKE and Share us:

Facebook: www.facebook.com/androiddesignnl

Google+: http://gplus.to/androiddesignnl

This lite version includes the following tools:

1) PI and T attenuator

2) Reflectometer (VSWR, Return loss)

3) Mismatch error limits (VSWR, Return loss)

4) Parallel LCR impedance/resonance

5) capacitor impedance

6) lowpass filter

7) Capacitor plate calculator

8) Power and Voltage Converter

9) Coupler directivity calculator.

Tools in full version includes;

1.Noise floor (Kelvin,dBm)

2.Amplifier cascade (NF, Gain, P1db, OIP2, OIP3)

3.Radar equation (2-way path loss)

4.Radio equation (1-way path loss)

5.Power and voltage converter (W,dBm,V,dBµV)

6.Field intensity and power density converter (W/m2, V/m, A/m, Tesla, Gauss,dBm, W)

7.Mismatch error limits (VSWR, Return loss)

8.Reflectometer (VSWR, Return loss)

9.Mitered Bend

10.Divider and Couplers (Wilkinson, Rat race, Branchline , microstrip and lumped)

11.Balanced and und balanced PI and T attenuator

12.Skin depth (DC and AC resistance)

13.PCB Trace calculator (impedance/dimensions)

- Microstrip

- Stripline

- Coplanar waveguide

- Coupled microstrip

- Coupled stripline

14.Image rejection (amplitude and phase imbalance)

15.Mixer harmonics (up and down convertion)

16.Helical antenna

17.Peak to RMS (peak, RMS, average, CF)

18.Air Core Inductor Inductance

19.Parallel plate Capacitor

20.PI and T attenuator

21.Ohm's Law

22.Parallel LCR impedance/resonance

23.Series LCR impedance/resonance

24.Inductor impedance

25.Capacitance impedance

26.Antenna temperature (Kelvin)

27.Radar Cross Section (RCS) calculator (Sphere,Cylinder, flat plate, corners, dBsm)

28.Noise Figure Y-Factor Methode

29.EMC (EIRP, ERP, dBµV/m)

30.Noise figure converter (dB, linear, Kelvin)

31.Frequency Band Designations (IEEE Radar band, Military Radar band, Radio band, Satellite, Wavefuide band)

32.Resistor color code (reverse lookup, 3 to 6 band)

33.Filter Design (Butterworth, Chebyshev, prototype):

- Low pass

- High pass filter

- Band pass

- Band stop filter

34.µ-Filter Design (microstrip, stripline):

- Interchange of Circuits

- Kuroda's Identities

- Series and Shunt Circuit lines

- Coupled line Circuits

- Stepped Impedance

35) PCB Trace Width and Clearance Calculator

36) Series and Parallel component (R, L and C) calculations.

37) Reverse Series and Parallel resistor calculations.

38) Inductor Color Code Calculator.

39) Capacitor Charge Calculator.

40) Led Resistor Calculator.

41) Voltage Divider Calculator.

42) Thin Film Resistor Calculator (Trim and non Trim)

43) Opamp Calculator

44) Lumped Balun Calculator

45) Wavelength calculator

46) L-Network Matching Calculator

47) LCR Parallel - Series Conversion Calculator

48) PI & T-Network Matching Calculator

49) Coax Line Calculator

50) Twisted pair Calculator

51) Lumped-Distributed Equivalences calculator

52) Fresnel Calculator

53) Inductor Charge Calculator.

54) Heat Sink temperature calculator

55) Thermal via calculator

56) Coupler directivity calculator

57) Cavity resonance calculator

## Ohm's Law Calculator

Ohm's Law Calculator for electronic engineers, hobbyists and students.

Feature list:

1) Ohm's Law

2) Resistor Color Code calculator.

3 )Series and Parallel component (R, L and C) calculations.

4 )Reverse Series and Parallel resistor calculations.

Also checkout the RF & Microwave Toolbox or the Analog Toolbox.

LIKE and Share us:

Google+: http://gplus.to/androiddesignnl

## Resistor SMD code calculator

This Resistor SMD code calculator will decode 4 code types:

Standard 3 digit code that can include:

- R to indicate a decimal point

- M to indicate a decimal point for milliohms (Current sensing SMDs)

- "underline" to indicate that the value is in milliohms (Current sensing SMDs)

Standard 4 digit code that can include “R” to indicate a decimal point.

EIA-96 1% code with a number in the range 01 to 96, followed by a letter

2, 5, and 10% code with a letter, followed by a numbers in the range 01 to 60

## SWR Calculator

Coupler Directivity Calculator is used to calculate the minimum and maximum values of Reflection Coefficient, VSWR, Return Loss and Mismatch Loss.

The Directivity Error Calculator shows the accuracy of a reflection measurement of unknown impedance. It bases its readings on the directivity of the coupler used for the measurement. It is also a convenient way to convert a reflection coefficient to an equivalent standing wave ratio (SWR), return loss, or mismatch loss.

LIKE and Share us:

Google+: http://gplus.to/androiddesignnl

## Black Screen Burn-in protector

This app gives you only a black screen. It is useless for normal android devices.

It works as a burn-in protector for plasma and Amoled Screens.

On some TV Sticks (mk808) you cannot dim the TV screen and the screen time out is also not working.

And if you only want to play only music (Spotify) then it could be possible that the screen will burn-in.

Tap Anywhere on the screen to exit the app.

## Wind Turbine Estimator beta

Wind Turbine estimator.

LIKE and Share us:

Google+: http://gplus.to/androiddesignnl

Calculate:

- Rated output power (kw)

- Annual Energy Output (kwh/year)

- Cost of wind power (k€/kwh)

- Annual Profit (k€)

- Return on Investment (%)

- Break even Point (Years)

- CO2 reduction (Tonnes/Year)

Input:

- Rotor size

- Wind Turbine cost (k€/kw)

- Wind turbine revenue (€/kwh)

- Turbine efficiency

- Generator efficiency

- Mechanical efficiency

- Capacity Factor (%)

- Land lease cost (%)

- Operations and Maintenance cost (%)

## Personel Alarm AD (beta)

This Personal Alarm app can be used for different situations.

Seniors can use this app to alert, in case of emergency, one or more family members.

People on the move can also use this app because the Alarm message contains also the location.

Seniors can use this app to alert, in case of emergency, one or more family members.

People on the move can also use this app because the Alarm message contains also the location.

A big advantage of this app is that there is no internet connection required.

Extra options:

Auto answer phone: Phone will auto answer phone calls from the contact persons.

Alarm shake activation: The alarm can be activated by shaking the phone.

## Yet Another Flashlight (YAF)

Wy Another Flashlight?

This is the most clean and simple Flashlight app with no advertising and no permissions other then accessing the flashlight of the camera.

With two simple buttons you can choose between using the camera's flashlight or the screen as light source.

The app is also useable when then the screen is locked.

Optional you can choose a screen color and change the screen intensity.

## Counting for kids

Counting for kids is a free, and educational arithmetic game for kids. It includes addition, subtraction, multiplication, division and percentage exercises in different variations.

The math game has different levels.

The game works on tablet and smartphone.

The math game has different levels.

The game works on tablet and smartphone.

Like and Share us:

Google+: http://gplus.to/androiddesignnl