Tiny Scope for Arduino

Features

- Configurable ADC speed for sampling rates from 10KHz to 300KHz (on UNO)
- Auto grid on time base from 2ms to 50us (on UNO)
- Vmax calibration and 3.3-5V detection using internal reference
- 0V auto trigger
- Display minimum-maximum voltage of captured signal
- Square waveforms are displayed properly
- Auto voltmeter mode when input is steady”

Link