Build guide

One Second One Shot

16×28 @ 2.54mm pitch · 9 components · 15 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.

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

Parts List

9 unique parts

Ref DesPartValueManufacturerPart NumberQtyLink
C1Electrolytic Cap10uF——1Amazon
C2Ceramic Cap10nF——1Amazon
J1Power Input (2-pin)——1—
J2Screw Terminal 2P (5.08mm)——1—
LED1LED——1Amazon
R1Resistor (axial)100k——1Amazon
R2Resistor (axial)10k——1Amazon
R3Resistor (axial)330——1Amazon
U1DIP-8——1—

Links may include affiliate referrals.

2. Cut wires

Cutting quantities by color and length

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

Cut#NetColorRouteCut LengthBends
6TRIGBlackL11 → J433mm10mm (90°)
12GNDBlackD3 → M333mm—
5TIMINGBlueF11 → I1523mm16mm (45°)
11VCCBlueG13 → C1628mm15mm (90°)
4TIMINGGreenG12 → E1733mm8mm (90°), 20mm (90°)
10VCCGreenG6 → H1433mm8mm (90°)
1CONTRedL15 → H1623mm15mm (90°)
13GNDRedD5 → D1330mm—
7TRIGRedM12 → E1333mm25mm (90°)
9VCCWhiteF7 → C523mm13mm (90°)
3TIMINGWhiteH11 → F1730mm20mm (90°)
15GNDWhiteJ17 → H2638mm28mm (90°)
8VCCYellowH7 → L720mm—
2OUTYellowH19 → F1330mm20mm (90°)
14GNDYellowC14 → I1835mm15mm (90°)

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.

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

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 · L15H16
W2 · H19F13
W3 · H11F17
W4 · G12E17
W5 · F11I15
W6 · L11J4
W7 · M12E13
W8 · H7L7
W9 · F7C5
W10 · G6H14
W11 · G13C16
W12 · D3M3
W13 · D5D13
W14 · C14I18
W15 · J17H26
W1 · L15H16W2 · H19F13W3 · H11F17W4 · G12E17W5 · F11I15W6 · L11J4W7 · M12E13W8 · H7L7W9 · F7C5W10 · G6H14W11 · G13C16W12 · D3M3W13 · D5D13W14 · C14I18W15 · J17H26

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 · L15H16
W2 · H19F13
W3 · H11F17
W4 · G12E17
W5 · F11I15
W6 · L11J4
W7 · M12E13
W8 · H7L7
W9 · F7C5
W10 · G6H14
W11 · G13C16
W12 · D3M3
W13 · D5D13
W14 · C14I18
W15 · J17H26
W1 · L15H16W2 · H19F13W3 · H11F17W4 · G12E17W5 · F11I15W6 · L11J4W7 · M12E13W8 · H7L7W9 · F7C5W10 · G6H14W11 · G13C16W12 · D3M3W13 · D5D13W14 · C14I18W15 · J17H26