Hot Cold Light (LM393 window comparator)

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.

23 wires to prepare; 543mm total wire, including end allowances.

Parts List

10 unique parts

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2. Cut wires

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

Total wire: 543mm (21.4in)

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 — GREEN — H25 → H26 — 13mm — Red

Cut 13mm.

Wire 2 — LED_V — J26 → G28 — 23mm — Yellow

Cut 23mm. Bend 90° left at 10mm.

Wire 3 — SENSE — N7 → N4 — 18mm — White

Cut 18mm.

Wire 4 — SENSE — L7 → H8 — 23mm — Green

Cut 23mm. Bend 90° down at 15mm.

Wire 5 — SENSE — M6 → K11 — 28mm — Blue

Cut 28mm. Bend 90° down at 10mm.

Wire 6 — HOT_OUT — F18 → F20 — 15mm — Black

Cut 15mm.

Wire 7 — HOT_OUT — H20 → F26 — 30mm — Red

Cut 30mm. Bend 90° left at 10mm. Bend 90° down at 15mm.

Wire 8 — HOT_OUT — D18 → F9 — 38mm — Yellow

Cut 38mm. Bend 90° right at 28mm.

Wire 9 — COLD_OUT — K18 → H24 — 33mm — White

Cut 33mm. Bend 90° left at 20mm.

Wire 10 — COLD_OUT — F24 → I26 — 21mm — Green

Cut 21mm. Bend 45° down-right at 8mm. Bend 45° right at 11mm.

Wire 11 — COLD_OUT — M18 → H12 — 38mm — Blue

Cut 38mm. Bend 90° left at 20mm.

Wire 12 — GND — L11 → K9 — 18mm — Black

Cut 18mm. Bend 90° left at 10mm.

Wire 13 — GND — J8 → G6 — 23mm — Red

Cut 23mm. Bend 90° up at 13mm.

Wire 14 — GND — H5 → D5 — 20mm — Yellow

Cut 20mm.

Wire 15 — GND — N11 → H13 — 30mm — White

Cut 30mm. Bend 90° left at 10mm.

Wire 16 — GND — G14 → F12 — 18mm — Green

Cut 18mm. Bend 90° left at 10mm.

Wire 17 — GND — H15 → H19 — 20mm — Blue

Cut 20mm.

Wire 18 — VCC — D14 → D11 — 18mm — Black

Cut 18mm.

Wire 19 — VCC — F14 → J13 — 23mm — Red

Cut 23mm. Bend 90° right at 8mm.

Wire 20 — VCC — J15 → J20 — 23mm — Yellow

Cut 23mm.

Wire 21 — VCC — F11 → J7 — 30mm — White

Cut 30mm. Bend 90° right at 15mm.

Wire 22 — VCC — J5 → J4 — 13mm — Green

Cut 13mm.

Wire 23 — VCC — K3 → C3 — 30mm — Blue

Cut 30mm.

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.