Scoppy - Oscilloscope

FHDM TECH

Contains adsIn-app purchases

About this app

Combine the Scoppy app with a Raspberry Pi Pico or Pico W to create a 500kS/s oscilloscope and 25MS/s logic analyzer.

Key Features:
- Wireless connectivity with the Pico W
- Horizontal scale and position adjustments
- Vertical scale and position adjustments
- Trigger channel and level selection
- Rising edge and falling edge triggers
- Auto and Normal triggering
- Continuous (Run) and Single capture modes
- Memory depth up to 100kpts for single captures
- Vertical and Horizontal Cursors
- Auto or fixed sample rate
- % pre-trigger samples setting
- Signal Generator
--- square wave (100Hz - 1.25MHz)
--- 1kHz PWM sine wave
- X-Y Mode
- FFT
--- Hann, Hamming, Blackman and Rectangle windows
--- vertical and horizontal cursors
--- dBm, dBmV and V vertical units
--- option to display both channels simultaneously
--- option to display the scope window alongside the FFT
- Probe attenuation settings eg. 1X, 10X, custom

Oscilloscope
- Two Channels
- Up to 500k samples per second (shared between channels)
- Time/Div: 5us - 20secs
- Up to 4 configurable voltage ranges per channel (see help for details)

Logic Analyzer
- Eight Channels
- Up to 25M samples per second (per channel)
- Time/Div: 50ns - 100ms

Analog Front End
Connect the input signal directly to the Pico ADC pins for a 0-3.3V input range or build your own analog front end to extend the input range. Several cheap and easy to build open-source designs can be found at oscilloscope.fhdm.xyz. Affordable front ends are also available for purchase at store.fhdm.xyz.

More information
More information including instructions for installing the free firmware onto your Pico or Pico W can be found here: https://github.com/fhdm-dev/scoppy and https://oscilloscope.fhdm.xyz

Ratings and reviews

Wow! The new updates to 2Msps sampling are amazing! I have been using Scoppy for two years and really liked it, but to get a 4x upgrade in sampling rate as a software upgrade is awesome! The other upgrades over the past two years have been great, too! I really like the flexibility to assign functions to arbitrary pins and to customize voltage ranges based on the design of the front end of the scope. Scoppy was great before, but now it's awesome. Awesomer. And it just keeps getting better!

Superb app! Brings a very premium DSO within reach of each & every beginner electronics-hobbyist! It needs you to build or buy the front-end as per your requirement or budget. You will end up with a Touch Screen, Dual Channel DSO with Fourier, Logic Analysis, etc capability. Thus, your almost-free device will save you from buying a costly mid-range DSO or help you pack up the same if you already have one because this is far more convenient to use. Bandwidth may be a problem for some of us.

Great app! I love the idea of using Android phone as an extension for Pico firmware. I've been able to drag and drop firmware directly to Pico and test it right away with this app. Excellent concept and presentation of Pico capabilities enhanced with USB communication. As per oscilloscope features - I see it as an interesting way to experiment with different signals generated with microcontroller boards. Personally I'm using it to prepare PWM pulses on another Pico board running CircuitPython.

What's new

* Minor fix to the display of the current sample rate and record length
* Better feedback during single shot captures at very slow sample rates
* A setting to quadruple the max. sample rate of the RP2040 to 2MS/s. This requires firmware version 17 or higher.