Laser Tripwire

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; 517mm total wire, including end allowances.

Parts List

13 unique parts

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2. Cut wires

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

Total wire: 517mm (20.4in)

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 — TRIM — D10 → D8 — 15mm — Red

Cut 15mm.

Wire 2 — GREEN — E27 → E24 — 18mm — Yellow

Cut 18mm.

Wire 3 — RED — L27 → L24 — 18mm — White

Cut 18mm.

Wire 4 — SENSE — G7 → I7 — 15mm — Green

Cut 15mm.

Wire 5 — SENSE — G9 → I15 — 35mm — Blue

Cut 35mm. Bend 90° down at 8mm. Bend 90° right at 23mm.

Wire 6 — ARM — E15 → H11 — 28mm — Black

Cut 28mm. Bend 90° right at 15mm.

Wire 7 — ALARM — E23 → J25 — 28mm — Red

Cut 28mm. Bend 90° down at 18mm.

Wire 8 — ALARM — L25 → L19 — 25mm — Yellow

Cut 25mm.

Wire 9 — ALARM — M18 → I11 — 38mm — White

Cut 38mm. Bend 90° left at 23mm.

Wire 10 — VCC — B6 → B12 — 25mm — Green

Cut 25mm.

Wire 11 — VCC — D12 → F14 — 17mm — Blue

Cut 17mm.

Wire 12 — VCC — G15 → K12 — 28mm — Black

Cut 28mm. Bend 90° up at 15mm.

Wire 13 — VCC — C5 → H5 — 23mm — Red

Cut 23mm.

Wire 14 — VCC — J11 → K19 — 33mm — Yellow

Cut 33mm. Bend 90° down at 8mm.

Wire 15 — VCC — J20 → L23 — 23mm — White

Cut 23mm. Bend 90° down at 10mm.

Wire 16 — VCC — H3 → M6 — 30mm — Green

Cut 30mm. Bend 90° down at 18mm.

Wire 17 — GND — D21 → D17 — 20mm — Blue

Cut 20mm.

Wire 18 — GND — C22 → E25 — 23mm — Black

Cut 23mm. Bend 90° right at 13mm.

Wire 19 — GND — F17 → F12 — 23mm — Red

Cut 23mm.

Wire 20 — GND — G11 → K8 — 23mm — Yellow

Cut 23mm. Bend 45° right at 16mm.

Wire 21 — GND — L7 → L8 — 13mm — White

Cut 13mm.

Wire 22 — GND — K6 → I5 — 18mm — Green

Cut 18mm. Bend 90° up at 10mm.

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.