LM386 Kit Amp

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.

17 wires to prepare; 445mm total wire, including end allowances.

Parts List

9 unique parts

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2. Cut wires

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

Total wire: 445mm (17.5in)

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 — SPK — D23 → D25 — 15mm — Red

Cut 15mm.

Wire 2 — IN — J8 → C8 — 28mm — Yellow

Cut 28mm.

Wire 3 — ZOBEL — J24 → L23 — 18mm — White

Cut 18mm. Bend 90° up at 10mm.

Wire 4 — BYPASS — J15 → E18 — 30mm — Green

Cut 30mm. Bend 90° left at 13mm.

Wire 5 — OUT — H20 → H17 — 18mm — Blue

Cut 18mm.

Wire 6 — OUT — J20 → E21 — 25mm — Black

Cut 25mm. Bend 90° left at 8mm.

Wire 7 — WIPER — K10 → F14 — 33mm — Red

Cut 33mm. Bend 90° down at 18mm.

Wire 8 — 9V — C3 → I3 — 25mm — Yellow

Cut 25mm.

Wire 9 — 9V — B4 → F18 — 56mm — White

Cut 56mm. Bend 90° right at 41mm.

Wire 10 — GND — E4 → E8 — 20mm — Green

Cut 20mm.

Wire 11 — GND — D5 → H5 — 20mm — Blue

Cut 20mm.

Wire 12 — GND — F9 → E14 — 24mm — Black

Cut 24mm. Bend 45° down-left at 15mm.

Wire 13 — GND — I6 → L8 — 23mm — Red

Cut 23mm. Bend 90° down at 13mm.

Wire 14 — GND — L10 → L16 — 25mm — Yellow

Cut 25mm.

Wire 15 — GND — J16 → H15 — 18mm — White

Cut 18mm. Bend 90° up at 10mm.

Wire 16 — GND — K17 → M25 — 35mm — Green

Cut 35mm. Bend 90° right at 25mm.

Wire 17 — GND — N24 → F25 — 33mm — Blue

Cut 33mm. Bend 90° left at 8mm.

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.