Solder headers to the Pico 2 and the Terminal PiCowbell.

Solder a 30 ohm resistor to pin 4 (current source) on the MIDI DIN-5 connector.

Solder a 10 ohm resistor to pin 5 (current sink) on the MIDI DIN-5 connector.

Solder a wire to each of the resistors. Solder a third wire to pin 2 (center pin) on the MIDI DIN-5 connector. The wires should be about 4 inches long.

Cover the solder joints with heat shrink.

Solder a wire from the center pin on the DC jack to the GND pin on the MPM3610. The power circuit is wired for a center negative power supply which are used by guitar pedals!

Solder a wire from the sleeve pin on the DC jack to the Vin pin on the MPM3610.

Solder a wire to the 5V pin on the MPM3610.

Solder a wire to pin 2 on the L side of the switch. Solder a wire to pin 3 on the L side of the switch. These wires should be about 4 inches long.

Cover the solder joints with heat shrink.

The LED mount has two parts: the main housing that the LED sits in and a small piece that has holes for each of the LED legs. This piece is inserted from the bottom of the housing to secure the LED in place.

Push a 3 mm LED into the mount housing.

Insert the LED legs into the holding piece for the mount and secure the LED by pushing the piece into the housing.

Solder a 220 resistor to the LED anode (the longer leg).

Solder a wire to the 220 ohm resistor.

Solder a wire to the LED cathode (the shorter leg). These wires should be about 5 inches long.

Apply heat shrink to the solder joints.