Multimeter/Oscilloscope

NECO

Contains ads

About this app

This Digital Multimeter/Oscilloscope help you to
measure:

1 - Volts
2 - Ohms
3 - Temperature
4 - The light (lx)
5 - Frequency
6 - Amplitude
7 - Oscilloscope included
8 - Sound Generator sine/square wave 0Hz - 20000Hz included(in version pro)
9 - Color code resistance calculator
10 - Save measuring data!!
11 - Added capacitance meter from 1nF to 10000 mF
12 - Inductance meter!

It's easy to build, you just need:

1 -A arduino uno or nano
2 - Bluetooth module(HC-05 or HC-06)
3 - Temperature sensor(TMP36)
4 - Some resistances.

And for Oscilloscope:

1 - A old headphones with 4 pins
2 - Capacitor from 0.1mF to 1mF.

MY WEB PAGE : https://www.neco-desarrollo.es

Please watch video tutorial How to use oscilloscope:

https://youtu.be/ZwNe8yEjjxo

**For build the circuit follow this**

LINK FOR DOWNLOAD SCHEMATIC:

http://neco-desarrollo.es/arduino-multimetro

LINK FOR DOWNLOAD ARDUINO SKETCH HERE:

http://neco-desarrollo.es/arduino-multimetro

MY WEB PAGE:

www.neco-desarrollo.es

Councils to improve the precision:

1 - Check the voltage of 5v pin of arduino after connecting everything, it is the reference voltage to measure ohms when connecting the bluetooth module the voltage drops a bit, it can be in 4.8v, put exact value in the arduino code

2 - The values ​​of the resistances must be precise

2 - You must weld all the connections to avoid parasitic resistances

Multimeter/Oscilloscope try it now!

Ratings and reviews

⭐ App Review: Multimeter Free 🔍 Purpose: This app is designed mainly to connect with a real Bluetooth multimeter. It’s not a full simulation app, so you can’t practice properly without hardware. ✅ Pros: Good if you already have a Bluetooth multimeter. Clean interface and realistic dial. Can read real-time voltage/current when connected ❌ Cons: No full simulation mode for offline learning. Always shows “Not Connected” without hardware. Not useful for beginners trying to learn multimeter skills

As an Applied Physcist-Electronics Engineer on the go. This app is 110% functional as a dmm, or oscilloscope. The ads can be removed if you actually buy it. And even those are not as bad as someone below states. The developer could easily just make this a complete app without the arduino addons, take a usb / USB-c cable, and connect leads to it.

The idea is good, but unfortunately, the app didn’t work for me. It wasn’t able to give accurate readings, and sometimes didn’t show any data at all. Hopefully, it improves in future updates.