555 Blinker

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.

14 wires to prepare; 373mm total wire, including end allowances.

Parts List

9 unique parts

Links may include affiliate referrals.

2. Cut wires

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

Total wire: 373mm (14.7in)

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 — OUT — J18 → G11 — 35mm — Red

Cut 35mm. Bend 90° left at 23mm.

Wire 2 — TIMING — D20 → F17 — 23mm — Yellow

Cut 23mm. Bend 90° right at 13mm.

Wire 3 — TIMING — G16 → F11 — 35mm — White

Cut 35mm. Bend 90° up at 10mm. Bend 90° left at 23mm.

Wire 4 — DISCH — J10 → F15 — 33mm — Green

Cut 33mm. Bend 90° left at 18mm.

Wire 5 — DISCH — K11 → D16 — 40mm — Blue

Cut 40mm. Bend 90° down at 23mm.

Wire 6 — VCC — K5 → F5 — 23mm — Black

Cut 23mm.

Wire 7 — VCC — E4 → C6 — 17mm — Red

Cut 17mm.

Wire 8 — VCC — J6 → H11 — 28mm — Yellow

Cut 28mm. Bend 90° down at 10mm.

Wire 9 — VCC — I12 → E15 — 28mm — White

Cut 28mm. Bend 90° left at 13mm.

Wire 10 — GND — G5 → D8 — 21mm — Green

Cut 21mm.

Wire 11 — GND — C9 → E11 — 17mm — Blue

Cut 17mm.

Wire 12 — GND — D12 → F18 — 30mm — Black

Cut 30mm. Bend 90° right at 20mm.

Wire 13 — GND — G19 → G23 — 20mm — Red

Cut 20mm.

Wire 14 — GND — H18 → K16 — 23mm — Yellow

Cut 23mm. Bend 90° right 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.