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3PDT LED Board
The 3PDT LED Board is a true bypass footswitch board that carries its own status LED. The LED, its current limiting resistor and a 10k brightness trimmer all sit on the board, so you can set the LED brightness once the pedal is boxed up without touching the effect board. It is wired the same as PedalPCB's 3PDT LED board with trimmer, so it drops into PedalPCB-style builds.
| Front | Back |
|---|---|
 |
 |
The back is shown as viewed from the back of the board. The board is 34.1 x 22.6 mm.
Gerbers: GERBER-3PDT-LED-Board-r2026-08-14.zip
| Pad | Connects to |
|---|---|
| JIG | Input jack ground |
| JI | Input jack tip |
| IN | To the effect input |
| - | Ground |
| SW | LED supply (+9 V): connect to the effect board's SW pad with its CLR and LED pads jumpered |
| OUT | From the effect output |
| JO | Output jack tip |
| JOG | Output jack ground |
| Component Name | Value | Note |
|---|---|---|
| R1 | CLR | LED current limiting resistor, choose to taste (sets the brightest setting) |
| VR1 | 10k | Brightness trimmer, 6 mm (T73YE footprint) |
| Component Name | Value | Note |
|---|---|---|
| D1 | LED | 3 mm or 5 mm, mounts on the same side as the footswitch |
| Component Name | Value | Note |
|---|---|---|
| U1 | 3PDT | Footswitch |
- It works the same way as PedalPCB's 3PDT LED board with trimmer. On the effect board, jumper the CLR and LED pads (leave the resistor and LED off) so its SW pad carries +9 V, then connect it to SW here. The LED, R1 and the trimmer on this board set the brightness (SW, R1, the trimmer, the LED, then the footswitch to ground).
- The effect input is grounded in bypass.
- The 3PDT and the LED mount on the side with the "If you can read this you mounted the 3PDT on the wrong side" warning; the switch body covers it when it is on the right side.
This layout is licensed with a Creative Commons BY-NC-SA 4.0 license (Attribution, Non-commercial, Share-alike).
- 2026.08.14 - First release.
Files for this board live in the main repository: Utility-Boards/3PDT-LED-Board/