Traffic Light Sequencer

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.

27 wires to prepare; 742mm total wire, including end allowances.

Parts List

12 unique parts

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2. Cut wires

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

Total wire: 742mm (29.2in)

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 — RST — C14 → E17 — 23mm — Red

Cut 23mm. Bend 90° right at 13mm.

Wire 2 — Q1D — E19 → E13 — 35mm — Yellow

Cut 35mm. Bend 90° up at 10mm. Bend 90° right at 25mm.

Wire 3 — DISCH — H10 → D10 — 20mm — White

Cut 20mm.

Wire 4 — RED — E25 → H25 — 18mm — Green

Cut 18mm.

Wire 5 — CLK — E6 → F17 — 56mm — Blue

Cut 56mm. Bend 90° down at 13mm. Bend 90° right at 41mm.

Wire 6 — Q3D — L19 → J13 — 30mm — Black

Cut 30mm. Bend 90° left at 20mm.

Wire 7 — Q0D — B20 → F13 — 38mm — Red

Cut 38mm. Bend 90° right at 23mm.

Wire 8 — Q2D — J19 → G13 — 48mm — Yellow

Cut 48mm. Bend 90° up at 13mm. Bend 90° left at 28mm.

Wire 9 — GREEN — I24 → I30 — 25mm — White

Cut 25mm.

Wire 10 — YELLOW — I28 → J17 — 40mm — Green

Cut 40mm. Bend 90° right at 33mm.

Wire 11 — TIMING — L6 → M6 — 13mm — Blue

Cut 13mm.

Wire 12 — TIMING — K5 → D6 — 30mm — Black

Cut 30mm. Bend 90° down at 23mm.

Wire 13 — TIMING — K7 → E10 — 33mm — Red

Cut 33mm. Bend 90° down at 15mm. Bend 90° left at 23mm.

Wire 14 — LEDK — N25 → I27 — 28mm — Yellow

Cut 28mm. Bend 90° down at 18mm.

Wire 15 — LEDK — G27 → G29 — 15mm — White

Cut 15mm.

Wire 16 — LEDK — I29 → I31 — 15mm — Green

Cut 15mm.

Wire 17 — VCC — H6 → F6 — 15mm — Blue

Cut 15mm.

Wire 18 — VCC — I5 → G5 — 15mm — Black

Cut 15mm.

Wire 19 — VCC — F5 → B9 — 30mm — Red

Cut 30mm. Bend 90° down at 15mm.

Wire 20 — VCC — J6 → N10 — 24mm — Yellow

Cut 24mm.

Wire 21 — VCC — C10 → C16 — 25mm — White

Cut 25mm.

Wire 22 — GND — N19 → L14 — 28mm — Green

Cut 28mm. Bend 90° left at 18mm.

Wire 23 — GND — K13 → M12 — 18mm — Blue

Cut 18mm. Bend 90° right at 8mm.

Wire 24 — GND — L11 → L8 — 18mm — Black

Cut 18mm.

Wire 25 — GND — N8 → H5 — 33mm — Red

Cut 33mm. Bend 90° left at 13mm.

Wire 26 — GND — H3 → C6 — 30mm — Yellow

Cut 30mm. Bend 90° down at 18mm.

Wire 27 — GND — O20 → G17 — 38mm — White

Cut 38mm. Bend 90° left at 13mm.

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.