The wiring for this circuit is the same for the Metro and the Metro Express. Note that the power rail is connected to 3V instead of 5V.
The last circuit is easy to build, but really fun to use:
- One end of the Force Sensitive Resistor (FSR) connects to the power rail.
- The other end of the FSR connects to analog pin 2 and a 10k ohm pull-up resistor.
- Connect a red LED to pin 9 and a 560 ohm current-limiting resistor.
