Build guide

One Chip Chaos Lamp

17×30 @ 2.54mm pitch · 12 components · 21 wires

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.

21 wires to prepare; 549mm total wire, including end allowances.

Parts List

9 unique parts

Ref DesPartValueManufacturerPart NumberQtyLink
C1, C2, C3Ceramic Cap2.2uF——3Amazon
J1Power Input (2-pin)——1—
Q1RGB LED (common anode)——1Amazon
R1Resistor (axial)470k——1Amazon
R2Resistor (axial)820k——1Amazon
R3Resistor (axial)1.5M——1Amazon
R4Resistor (axial)330——1Amazon
R5, R6Resistor (axial)220——2Amazon
U1DIP-14——1—

Links may include affiliate referrals.

2. Cut wires

Cutting quantities by color and length

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

Cut#NetColorRouteCut LengthBends
6OSC2BlackL7 → K713mm—
18GNDBlackL9 → L1525mm—
12OUT2BlackL11 → H1428mm15mm (90°)
17GNDBlueK10 → E1025mm—
5OSC1BlueD8 → D1528mm—
11OUT1BlueC12 → C2030mm—
4OSC1GreenD7 → E713mm—
10OUT1GreenD11 → G1421mm—
16GNDGreenJ4 → J923mm—
1REDRedD25 → F2717mm—
7OSC2RedJ8 → J1425mm—
19GNDRedK14 → L2026mm9mm (45°)
13OUT2RedN11 → O1830mm23mm (90°)
3OUT3WhiteI21 → I1818mm—
21GNDWhiteK21 → F1830mm18mm (90°)
9GRNWhiteO24 → H2735mm23mm (90°)
15VDDWhiteE18 → G2738mm28mm (90°)
2OUT3YellowL23 → J2218mm10mm (90°)
20GNDYellowJ20 → G1823mm13mm (90°)
8OSC2YellowL8 → I1433mm20mm (90°)
14VDDYellowH5 → D1751mm15mm (90°)

Total wire: 549mm (21.6in)

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.

Bend ruler and shape for wire 1
Cut 17mm.
Bend ruler and shape for wire 2
Cut 18mm. Bend 90° up at 10mm.
Bend ruler and shape for wire 3
Cut 18mm.
Bend ruler and shape for wire 4
Cut 13mm.
Bend ruler and shape for wire 5
Cut 28mm.
Bend ruler and shape for wire 6
Cut 13mm.
Bend ruler and shape for wire 7
Cut 25mm.
Bend ruler and shape for wire 8
Cut 33mm. Bend 90° left at 20mm.
Bend ruler and shape for wire 9
Cut 35mm. Bend 90° down at 23mm.
Bend ruler and shape for wire 10
Cut 21mm.
Bend ruler and shape for wire 11
Cut 30mm.
Bend ruler and shape for wire 12
Cut 28mm. Bend 90° down at 15mm.
Bend ruler and shape for wire 13
Cut 30mm. Bend 90° right at 23mm.
Bend ruler and shape for wire 14
Cut 51mm. Bend 90° down at 15mm.
Bend ruler and shape for wire 15
Cut 38mm. Bend 90° right at 28mm.
Bend ruler and shape for wire 16
Cut 23mm.
Bend ruler and shape for wire 17
Cut 25mm.
Bend ruler and shape for wire 18
Cut 25mm.
Bend ruler and shape for wire 19
Cut 26mm. Bend 45° down at 9mm.
Bend ruler and shape for wire 20
Cut 23mm. Bend 90° up at 13mm.
Bend ruler and shape for wire 21
Cut 30mm. Bend 90° up at 18mm.

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.

W1 · D25F27
W2 · L23J22
W3 · I21I18
W4 · D7E7
W5 · D8D15
W6 · L7K7
W7 · J8J14
W8 · L8I14
W9 · O24H27
W10 · D11G14
W11 · C12C20
W12 · L11H14
W13 · N11O18
W14 · H5D17
W15 · E18G27
W16 · J4J9
W17 · K10E10
W18 · L9L15
W19 · K14L20
W20 · J20G18
W21 · K21F18
W1 · D25F27W2 · L23J22W3 · I21I18W4 · D7E7W5 · D8D15W6 · L7K7W7 · J8J14W8 · L8I14W9 · O24H27W10 · D11G14W11 · C12C20W12 · L11H14W13 · N11O18W14 · H5D17W15 · E18G27W16 · J4J9W17 · K10E10W18 · L9L15W19 · K14L20W20 · J20G18W21 · K21F18

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.

W1 · D25F27
W2 · L23J22
W3 · I21I18
W4 · D7E7
W5 · D8D15
W6 · L7K7
W7 · J8J14
W8 · L8I14
W9 · O24H27
W10 · D11G14
W11 · C12C20
W12 · L11H14
W13 · N11O18
W14 · H5D17
W15 · E18G27
W16 · J4J9
W17 · K10E10
W18 · L9L15
W19 · K14L20
W20 · J20G18
W21 · K21F18
W1 · D25F27W2 · L23J22W3 · I21I18W4 · D7E7W5 · D8D15W6 · L7K7W7 · J8J14W8 · L8I14W9 · O24H27W10 · D11G14W11 · C12C20W12 · L11H14W13 · N11O18W14 · H5D17W15 · E18G27W16 · J4J9W17 · K10E10W18 · L9L15W19 · K14L20W20 · J20G18W21 · K21F18