Duet switch tester

ai03-2725·duet-switch-tester·Duet-MainPCB/Duet-Switch-Tester.kicad_pcb

About the Duet switch tester PCB

Duet switch tester is an open source RP2040/RP2350 PCB design by ai03-2725, published on GitHub under the AGPL-3.0 license. It is a 2-layer board measuring 379.4 × 117.5 mm, with 253 components from 20 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the ZD25Q80BNIGR, PRTR5V0U2X and AP7313-33SRG-7. By type, the board carries 109 diodes, 108 relays, 17 capacitors, 10 resistors, 4 ICs and 2 switches.

It belongs with the displays & leds and keyboards designs in this gallery.

From the project

Switch tester designed for two of each switch for display and testability

A switch tester intended for use at events and storefronts. Displays two of each switch - one with a keycap for testing the keyfeel, and another without a keycap to show off the visuals. Can be assembled with a functioning PCB to pair the tester to a kiosk device for additional information display purposes.

Necessary if planning to pair the device to a webapp or similar: - 1x PCB (Optional if you're not looking to pair the tester to a device) - Optional hotswap standoffs for anchoring the PCB to the plate - 10x M2x3.5 Spacers - 20x M2x3 wafer-head screws

Duet switch tester, from the project README — From the project README

Main components on the Duet switch tester

ZD25Q80BNIGR PRTR5V0U2X RP2040 AP7313-33SRG-7

Duet switch tester bill of materials (BOM)

253 components, 20 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	ZD25Q80BNIGR	USON-8-1.5mm	U1
1	PRTR5V0U2X	SOT143B	U2
1	RP2040	RP2040-QFN-56	U3
1	AP7313-33SRG-7	SOT-23	U4
1	12MHZ 12MHz	Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
1	500MA 500mA	Fuse_1206_3216Metric	F1
108	CPG151101S11-16	MX-Hotswap-1U	K1, K2, K3, K4, K5, K6, K7, K8 +100
2	SW_Push	SW_SPST_TL3342	SW1, SW2
1	HRO-TYPE-C-31-M-12	HRO-TYPE-C-31-M-12-Assembly	USB1
108	1N4148W	D_SOD-123-MinimalPrint	D1, D2, D3, D4, D5, D6, D7, D8 +100
1	RB060M-60TR	D_SOD-123	D109
2	27PF 27pF	C_0402_1005Metric	C1, C2
10	0.1UF 0.1uF	C_0402_1005Metric	C3, C4, C5, C8, C9, C10, C11, C12 +2
4	1UF 1uF	C_0402_1005Metric	C6, C15, C16, C17
1	10UF-OPT 10uF-OPT	C_0603_1608Metric	C7
3	1k	R_0402_1005Metric	R1, R3, R4
1	10K-OPT 10k-OPT	R_0402_1005Metric	R2
2	27.4	R_0402_1005Metric	R5, R6
2	100K 100k	R_0603_1608Metric	R7, R8
2	5K1 5k1	R_0603_1608Metric	R9, R10

Duet switch tester design files

The KiCad project lives in the ai03-2725/duet-switch-tester repository on GitHub; these links point at the commit this page was built from.

Duet switch tester: common questions

What microcontroller does the Duet switch tester use?

The Duet switch tester is built around the RP2040, from the RP2040/RP2350 family.

How big is the Duet switch tester PCB?

The Duet switch tester measures 379.4 × 117.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Duet switch tester?

253 components, from 20 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Duet switch tester design files?

From the ai03-2725/duet-switch-tester repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Duet switch tester design in my own project?

Yes, under the terms of its AGPL-3.0 license, which ai03-2725 chose for the repository.

Can I test firmware for the Duet switch tester without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.