4
Intermediate
Project guide
Circuit Diagram
Text emphasized with a red exclamation:
The power supply is setup as a center negative supply for guitar pedals!
MPM3610
- MPM3610 GND to DC jack center pin (black wire)
- MPM3610 Vin to DC jack side pin (red wire)
- MPM3610 5V to Pico 2 VSYS (orange wire)
- MPM3610 GND to Pico 2 GND (black wire)
MIDI Jack
- MIDI jack pin 4 to 30 ohm resistor to Pico 2 3.3V (yellow wire)
- MIDI jack center pin to GND (black wire)
- MIDI jack pin 5 to 10 ohm resistor to Pico 2 GP0/TX (cyan wire)
LED
- LED cathode to GND (black wire)
- LED anode to 220 ohm resistor to Pico 2 GP18 (pink wire)
Power Switch
- Switch output to Pico 2 EN (purple wire)
- Switch GND to GND (black wire)
Foot Switches
- Pico 2 GND to all foot switches GND (black wires)
- Switch 1 to Pico 2 GP2 (green wire)
- Switch 2 to Pico 2 GP3 (yellow wire)
- Switch 3 to Pico 2 GP4 (blue wire)
- Switch 4 to Pico 2 GP5 (white wire)
- Switch 5 to Pico 2 GP6 (green wire)
- Switch 6 to Pico 2 GP7 (yellow wire)
- Switch 7 to Pico 2 GP8 (blue wire)
- Switch 8 to Pico 2 GP9 (white wire)
- Switch 9 to Pico 2 GP10 (green wire)
- Switch 10 to Pico 2 GP11 (yellow wire)
- Switch 11 to Pico 2 GP12 (blue wire)
- Switch 12 to Pico 2 GP13 (white wire)
- Switch 13 to Pico 2 GP14 (green wire)
- Switch 14 to Pico 2 GP15 (yellow wire)
To protect against reverse polarity for the DC jack power input, you can place a diode between the DC jack voltage output and Vin on the MPM3610.
This here is a 10 pack of the classic 1N4001 power blocking diode. These are good for reverse polarity protection (put it between your DC power jack and circuitry to avoid a...
$1.50
In Stock
Page last edited January 29, 2026
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