Relay Driver

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.

9 wires to prepare; 240mm total wire, including end allowances.

Parts List

6 unique parts

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2. Cut wires

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

Total wire: 240mm (9.5in)

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 — GND — E12 → E5 — 28mm — Red

Cut 28mm.

Wire 2 — SIG — I5 → F5 — 18mm — Yellow

Cut 18mm.

Wire 3 — BASE — I11 → F14 — 21mm — White

Cut 21mm.

Wire 4 — COIL — H16 → E16 — 18mm — Green

Cut 18mm.

Wire 5 — COIL — J16 → L18 — 17mm — Blue

Cut 17mm.

Wire 6 — COIL — I15 → G22 — 33mm — Black

Cut 33mm. Bend 90° down at 10mm.

Wire 7 — 5V — H20 → E22 — 23mm — Red

Cut 23mm. Bend 90° down at 13mm.

Wire 8 — 5V — J20 → L11 — 38mm — Yellow

Cut 38mm. Bend 90° right at 28mm.

Wire 9 — 5V — M10 → D5 — 46mm — White

Cut 46mm. Bend 90° left at 18mm.

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.