Solenoid Wire Haircut
The solenoids have fairly long wires, approximately 11 inches each. You can leave them as-is, but it can make for messy wiring. To neaten things up, you can cut each solenoid's wires to the following lengths:
- Solenoids 1 and 2 (far left): 7 inches/17.78 cm
- Solenoids 3 and 4: 6 inches/15.24 cm
- Solenoids 5 and 6: 5 inches/12.7 cm
- Solenoids 7 and 8 (far right): 3 inches/7.62 cm
After cutting the wires, splice them to insert into the terminal blocks on the breakout.
Attach each solenoid's black wire into one of the numbered terminal blocks and each solenoid's red wire into one of the + terminal blocks:
- Solenoid 1 black wire (far left) to terminal block 0
- Solenoid 1 red wire to terminal block +
- Solenoid 2 black wire to terminal block 1
- Solenoid 2 red wire to terminal block +
- Solenoid 3 black wire to terminal block 2
- Solenoid 3 red wire to terminal block +
- Solenoid 4 black wire to terminal block 3
- Solenoid 4 red wire to terminal block +
- Solenoid 5 black wire to terminal block 4
- Solenoid 5 red wire to terminal block +
- Solenoid 6 black wire to terminal block 5
- Solenoid 6 red wire to terminal block +
- Solenoid 7 black wire to terminal block 6
- Solenoid 7 red wire to terminal block +
- Solenoid 8 black wire (far right) to terminal block 7
- Solenoid 8 red wire to terminal block +
Insert wires into the center power terminal block on the breakout. Attach the GND (-) wire to GND on the Metro. Attach the + wire to Vin on the Metro. This will allow the DC jack input on the Metro to power the solenoids with 12V.
Plug a 100 mm STEMMA QT cable into the STEMMA QT port on the Metro. Plug in the other end into the breakout.
Page last edited May 20, 2025
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