Build guide

Three Part Weather Station

15×24 @ 2.54mm pitch · 9 components · 14 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.

14 wires to prepare; 326mm total wire, including end allowances.

Parts List

7 unique parts

Ref DesPartValueManufacturerPart NumberQtyLink
C1Ceramic Cap100nF——1Amazon
Q1RGB LED (common cathode)——1Amazon
R1, R2Resistor (axial)4.7k——2Amazon
R3Resistor (axial)220——1Amazon
R4, R5Resistor (axial)100——2Amazon
U1Seeed Studio XIAO ESP32C3Seeed Studio1139910541Amazon
U2I²C Breakout (4-pin)——1—

Links may include affiliate referrals.

2. Cut wires

Cutting quantities by color and length

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

Cut#NetColorRouteCut LengthBends
6LEDBBlackG19 → G2218mm—
12GNDBlackJ13 → D546mm25mm (90°)
5REDBlueD14 → D1118mm—
11GNDBlueI18 → D2130mm13mm (90°)
10GNDGreenJ17 → J1515mm—
4BLUGreenG13 → F1118mm10mm (90°)
1GRNRedE13 → E1115mm—
133V3RedJ20 → J1620mm—
7SDARedK13 → G930mm15mm (90°)
3LEDRWhiteC19 → C2115mm—
9SCLWhiteL13 → H1125mm15mm (90°)
8SCLYellowM15 → L1513mm—
2LEDGYellowE19 → E2115mm—
143V3YellowI13 → E349mm9mm (45°), 31mm (90°)

Total wire: 326mm (12.9in)

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 15mm.
Bend ruler and shape for wire 2
Cut 15mm.
Bend ruler and shape for wire 3
Cut 15mm.
Bend ruler and shape for wire 4
Cut 18mm. Bend 90° left at 10mm.
Bend ruler and shape for wire 5
Cut 18mm.
Bend ruler and shape for wire 6
Cut 18mm.
Bend ruler and shape for wire 7
Cut 30mm. Bend 90° left at 15mm.
Bend ruler and shape for wire 8
Cut 13mm.
Bend ruler and shape for wire 9
Cut 25mm. Bend 90° up at 15mm.
Bend ruler and shape for wire 10
Cut 15mm.
Bend ruler and shape for wire 11
Cut 30mm. Bend 90° left at 13mm.
Bend ruler and shape for wire 12
Cut 46mm. Bend 90° left at 25mm.
Bend ruler and shape for wire 13
Cut 20mm.
Bend ruler and shape for wire 14
Cut 49mm. Bend 45° up at 9mm. Bend 90° left at 31mm.

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 · E13E11
W2 · E19E21
W3 · C19C21
W4 · G13F11
W5 · D14D11
W6 · G19G22
W7 · K13G9
W8 · M15L15
W9 · L13H11
W10 · J17J15
W11 · I18D21
W12 · J13D5
W13 · J20J16
W14 · I13E3
W1 · E13E11W2 · E19E21W3 · C19C21W4 · G13F11W5 · D14D11W6 · G19G22W7 · K13G9W8 · M15L15W9 · L13H11W10 · J17J15W11 · I18D21W12 · J13D5W13 · J20J16W14 · I13E3

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 · E13E11
W2 · E19E21
W3 · C19C21
W4 · G13F11
W5 · D14D11
W6 · G19G22
W7 · K13G9
W8 · M15L15
W9 · L13H11
W10 · J17J15
W11 · I18D21
W12 · J13D5
W13 · J20J16
W14 · I13E3
W1 · E13E11W2 · E19E21W3 · C19C21W4 · G13F11W5 · D14D11W6 · G19G22W7 · K13G9W8 · M15L15W9 · L13H11W10 · J17J15W11 · I18D21W12 · J13D5W13 · J20J16W14 · I13E3