Uses TM1638 LED/keyboard
Pins:
TM1638 (PLEASE USE 3.3v supply!):
- SCK: GP0
- DIO: GP1
- CS: GP2
Capacitance meter:
- CX input: between GP28 and GND
- Resistor 220 Ohm between GP28 and GP26
- Resistor 100 kOhm between GP28 and GP27
Frequency meter:
- Input pin: GP18
Generator 1.25 MHZ for testing:
- Output pin: GP16