Build guide

Button Pull-Up

16×28 @ 2.54mm pitch · 9 components · 12 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.

12 wires to prepare; 312mm total wire, including end allowances.

Parts List

8 unique parts

Ref DesPartValueManufacturerPart NumberQtyLink
C1Ceramic Cap100nF——1Amazon
J1Power Input (2-pin)——1—
J2Signal+Power Header (3-pin)——1—
J3Screw Terminal 2P (5.08mm)——1—
LED1LED——1Amazon
Q1NPN Transistor (TO-92)——1Amazon
R1, R2Resistor (axial)10k——2Amazon
R3Resistor (axial)330——1Amazon

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2. Cut wires

Cutting quantities by color and length

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

Cut#NetColorRouteCut LengthBends
6INBlackE12 → G923mm13mm (90°)
12GNDBlackM11 → G2151mm30mm (90°)
11GNDBlueK9 → L1014mm—
55VBlueJ5 → K1435mm8mm (90°)
45VGreenC3 → J328mm—
10GNDGreenK2 → J833mm10mm (90°), 25mm (90°)
1COLRedK24 → H2418mm—
7INRedH8 → M823mm—
35VWhiteC8 → C518mm—
9GNDWhiteD3 → K328mm—
8INYellowL9 → L520mm—
2BASEYellowE19 → F2323mm15mm (90°)

Total wire: 312mm (12.3in)

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 18mm.
Bend ruler and shape for wire 2
Cut 23mm. Bend 90° right at 15mm.
Bend ruler and shape for wire 3
Cut 18mm.
Bend ruler and shape for wire 4
Cut 28mm.
Bend ruler and shape for wire 5
Cut 35mm. Bend 90° down at 8mm.
Bend ruler and shape for wire 6
Cut 23mm. Bend 90° right at 13mm.
Bend ruler and shape for wire 7
Cut 23mm.
Bend ruler and shape for wire 8
Cut 20mm.
Bend ruler and shape for wire 9
Cut 28mm.
Bend ruler and shape for wire 10
Cut 33mm. Bend 90° down at 10mm. Bend 90° right at 25mm.
Bend ruler and shape for wire 11
Cut 14mm.
Bend ruler and shape for wire 12
Cut 51mm. Bend 90° left at 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.

W1 · K24H24
W2 · E19F23
W3 · C8C5
W4 · C3J3
W5 · J5K14
W6 · E12G9
W7 · H8M8
W8 · L9L5
W9 · D3K3
W10 · K2J8
W11 · K9L10
W12 · M11G21
W1 · K24H24W2 · E19F23W3 · C8C5W4 · C3J3W5 · J5K14W6 · E12G9W7 · H8M8W8 · L9L5W9 · D3K3W10 · K2J8W11 · K9L10W12 · M11G21

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 · K24H24
W2 · E19F23
W3 · C8C5
W4 · C3J3
W5 · J5K14
W6 · E12G9
W7 · H8M8
W8 · L9L5
W9 · D3K3
W10 · K2J8
W11 · K9L10
W12 · M11G21
W1 · K24H24W2 · E19F23W3 · C8C5W4 · C3J3W5 · J5K14W6 · E12G9W7 · H8M8W8 · L9L5W9 · D3K3W10 · K2J8W11 · K9L10W12 · M11G21