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2 layers55 × 80 mmRelay board, the printed circuit board in 3D

Simple Relay Board, my first PCB!

Size
55 × 80 mm
Copper layers
2
Thickness
1.6 mm
Parts
26
Nets
69
Pads
169
Tracks, vias
260, 48
Pours
2
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
7 Jun 2026
Updated
7 Jun 2026

Overview

Relay board is an open-source printed circuit board by RmStorm, from the RmStorm/relay_board repository on GitHub, published under the MIT licence. It is a 2-layer board of 55 × 80 mm with 26 parts on 69 nets, routed with 260 tracks and 48 vias.

It is built around the BD82029FVJ-GE2, ULN2003A and USBLC6-2SC6, with the AWHSH105D00G, TB001-500-09BE and 12402012E212A among its other parts. Its parts include 7 capacitors, 6 switches, 5 ICs, 4 resistors and 4 connectors. It belongs with the home automation and IoT boards and the STM32 boards of this library.

Main components

6

Parts

26
QtyValueFootprintReferences
6AWHSH105D00GAWHSH105D00G:RELAY_AWHSH105D00GK1, K2, K3, K4, K5, K6
40u1FCapacitor_SMD:C_0603_1608MetricC1, C5, C6, C11
21uFCapacitor_SMD:C_0603_1608MetricC3, C4
25k1Resistor_SMD:R_0603_1608MetricR1, R2
2TB001-500-09BEscrews:CUI_TB001-500-09BEJ2, J4
11000 µFCapacitor_THT:C_Radial_D8.0mm_H11.5mm_P3.50mmC2
1100kResistor_SMD:R_0603_1608MetricR3
110kResistor_SMD:R_0603_1608MetricR4
112402012E212Ausbc:AMPHENOL_12402012E212AJ1
13220-14-0100-00conn:CONN14_3220-14_CNCJ3
1BD82029FVJ-GE2efuse:TSSOP-B8J_ROMU4
1STM32L052K8TxPackage_QFP:LQFP-32_7x7mm_P0.8mmU1
1TCR2EF33_LMCTldo:SOT-25 SMV_TOSU5
1ULN2003APackage_DIP:DIP-16_W7.62mmU3
1USBLC6-2SC6Package_TO_SOT_SMD:SOT-23-6U2

Questions

How big is the Relay board PCB?

It measures 55 × 80 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Relay board use?

26 parts, built around the BD82029FVJ-GE2, ULN2003A, USBLC6-2SC6 and AWHSH105D00G. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Relay board KiCad files?

From the RmStorm/relay_board repository on GitHub, at the commit this page was made from: the board is relay_board.kicad_pcb and its schematic relay_board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Relay board design in my own project?

Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

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