One Knob 12V LED Dimmer

1. Prepare

Verify component pinouts against each manufacturer’s datasheet before wiring. Label cut wires with their wire numbers; the same numbers follow them through every stage. Wire colors are written out for black-and-white printing. Custom colors can be named in the wire library.

Progress is saved on this browser for this board revision. Changes to the board or measurements start a new checklist. Printed diagrams are references, not life-size templates.

22 wires to prepare; 641mm total wire, including end allowances.

Parts List

10 unique parts

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2. Cut wires

22 wires · +5mm per end for lead-through

Total wire: 641mm (25.2in)

3. Bend wires

Use the straight-line ruler to mark bend points on the wire before bending. Use the bent shape as a visual reference while bending.

Wire 1 — CTRL — N10 → I10 — 23mm — Red

Cut 23mm.

Wire 2 — LOAD — K23 → O24 — 23mm — Yellow

Cut 23mm. Bend 90° down at 15mm.

Wire 3 — POT_A — G15 → C16 — 23mm — White

Cut 23mm. Bend 90° down at 15mm.

Wire 4 — POT_B — K19 → E18 — 28mm — Green

Cut 28mm. Bend 90° left at 8mm.

Wire 5 — GATE — F25 → G20 — 25mm — Blue

Cut 25mm. Bend 90° right at 18mm.

Wire 6 — GATE — H21 → J21 — 15mm — Black

Cut 15mm.

Wire 7 — OUT_G — E20 → G7 — 58mm — Red

Cut 58mm. Bend 90° up at 15mm. Bend 90° left at 48mm.

Wire 8 — DISCH_W — J9 → F11 — 25mm — Yellow

Cut 25mm. Bend 90° left at 10mm.

Wire 9 — DISCH_W — K10 → D16 — 43mm — White

Cut 43mm. Bend 90° left at 20mm.

Wire 10 — TIMING — I19 → J14 — 25mm — Green

Cut 25mm. Bend 90° right at 18mm.

Wire 11 — TIMING — K15 → O15 — 20mm — Blue

Cut 20mm.

Wire 12 — TIMING — J16 → G11 — 30mm — Black

Cut 30mm. Bend 90° up at 13mm.

Wire 13 — TIMING — J13 → F7 — 35mm — Red

Cut 35mm. Bend 90° left at 20mm.

Wire 14 — V12 — J5 → H7 — 17mm — Yellow

Cut 17mm.

Wire 15 — V12 — I8 → E11 — 28mm — White

Cut 28mm. Bend 90° left at 13mm.

Wire 16 — V12 — D10 → D5 — 23mm — Green

Cut 23mm.

Wire 17 — V12 — L5 → L25 — 61mm — Blue

Cut 61mm.

Wire 18 — GND — H25 → J25 — 15mm — Black

Cut 15mm.

Wire 19 — GND — K24 → N17 — 35mm — Red

Cut 35mm. Bend 90° right at 23mm.

Wire 20 — GND — O18 → N13 — 25mm — Yellow

Cut 25mm. Bend 90° up at 8mm.

Wire 21 — GND — M12 → E7 — 43mm — White

Cut 43mm. Bend 90° left at 18mm.

Wire 22 — GND — D8 → F5 — 20mm — Green

Cut 20mm. Bend 45° up at 12mm.

4. Place wires

Component side. Select a wire to emphasize its route in its own color and highlight its endpoints. Wires follow number order, matching the bend guide and solder checklist.

5. Solder connections

Bottom view: horizontally mirrored. Coordinate names still identify the same physical holes. Highlights mark wire endpoints; wire routes belong on the component side. Check each connection and the listed solder bridges.

Board is horizontally mirrored. Column A is on the right.