2 layers379.4 × 117.5 mm
Duet switch tester
ai03-2725/duet-switch-tester
Switch tester designed for two of each switch for display and testability
265 parts3AGPL-3.0
2 layers214.3 × 77.7 mm
Alphamod32
marksard/alphamod32The ALPHAMOD32 is a 32 key compact keyboard project.
- Size
- 214.3 × 77.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 84
- Nets
- 81
- Pads
- 398
- Tracks, vias
- 565, 70
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 12 Sep 2026
- Updated
- 12 Sep 2026
Overview
Alphamod32 is an open-source printed circuit board by marksard, from the marksard/alphamod32 repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 2-layer board of 214.3 × 77.7 mm with 84 parts on 81 nets, routed with 565 tracks and 70 vias.
It is built around the TLV73333PDBV, CPG151101S11-16 and PRTR5V0U2X. Its parts include 32 diodes, 32 switches, 6 capacitors, 4 resistors and 2 ICs. It belongs with the keyboards and input boards and the STM32 boards of this library.
Main components
3
TLV73333PDBV
SOT-23-5-40℃~+125℃@(Tj) 1 125mV@(300mA) 28uVrms 3.3V 300mA 34uA 5.5V 50dB@(1kHz) Fixed Positive Under Voltage Lockout、Over Current Protection、Over Temperature Protection、Enable SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
CPG151101S11-16
SMD- Mechanical Keyboard Shaft ROHSKailhMechanical Keyboard Shaft
PRTR5V0U2X
SOT-143-55℃~+125℃ 0.3pF、0.8pF 100W 10V、15V 5V 6.5V 6A 80nA ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Three channels Unidirectional SOT-143 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
README
README.mdalphamod32
The ALPHAMOD32 is a 32 key compact keyboard project.
Completed example
Layout
Support software
QMK Firmware
https://github.com/marksard/qmk_firmware/tree/own_build/keyboards/marksard/alphamod32
Build guide
Parts
84| Qty | Value | Footprint | References |
|---|---|---|---|
| 32 | CPG151101S11-16 | ai03.MX_Hotswap:MX-Hotswap-1U_F | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +16 |
| 32 | D | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +16 |
| 4 | 100nF | Capacitor_SMD:C_0402_1005Metric | C3, C4, C5, C6 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R3, R4 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 1uF | Capacitor_SMD:C_0402_1005Metric | C2 |
| 1 | 500mA | Fuse:Fuse_0805_2012Metric | F1 |
| 1 | BOOT0 | Marksard_Keyboard:TVBP06-B043CB | MSW2 |
| 1 | NRST | Marksard_Keyboard:TVBP06-B043CB | MSW1 |
| 1 | PRTR5V0U2X | Package_TO_SOT_SMD:SOT-143 | ESD1 |
| 1 | STM32F072C8Tx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | SWD | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J2 |
| 1 | TLV73333PDBV | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | USB_C_Receptacle_USB2.0 | Marksard_Keyboard:HRO-TYPE-C-31-M-12-Assembly | J1 |
| 1 | am32_PCB_Template_v1.0.0 | Marksard_Keyboard:am32_PCB_Template_v1.0.0 | H1 |
| 1 | marksard | Marksard_Audio:marksard_logos2_SM_s | H2 |
Questions
How big is the Alphamod32 PCB?
It measures 214.3 × 77.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Alphamod32 use?
84 parts, built around the TLV73333PDBV, CPG151101S11-16 and PRTR5V0U2X. 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 Alphamod32 KiCad files?
From the marksard/alphamod32 repository on GitHub, at the commit this page was made from: the board is pcb/rev1/AlphaMod32.kicad_pcb and its schematic pcb/rev1/AlphaMod32.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Alphamod32 design in my own project?
Its repository publishes it under the CERN-OHL-S-2.0 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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