2 layers42 × 42 mm
C!n tester
aroum/cn_tester
c!n tester is a hardware and software system designed for testing ProMicro-like microcontrollers.
11 parts37MIT
2 layers87 × 87 mm
Cn tester panel
aroum/cn_tester37c!n tester is a hardware and software system designed for testing ProMicro-like microcontrollers.
- Size
- 87 × 87 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 108
- Nets
- 116
- Pads
- 340
- Tracks, vias
- 804, 0
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 7 Nov 2025
- Updated
- 19 Jul 2026
Overview
Cn tester panel is an open-source printed circuit board by aroum, from the aroum/cn_tester repository on GitHub, published under the MIT licence. It is a 2-layer board of 87 × 87 mm with 108 parts on 116 nets, routed with 804 tracks and 0 vias.
Its parts include 12 switches, 8 ICs and 4 resistors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
README
pcb/README.mdPanel
In the panel folder, a 2x2 panel option is available, its size is smaller than 100x100 mm.
Gerber files
Gerber files can be downloaded in releases.
BOM
| Item | Qty | Remarks |
|---|---|---|
| MCU | 2 | target and master |
| Sockets | 12x4 | for MCU |
| SMD button 3x4x2mm | 3 | for reset and start test |
| SMD resistor 0603 1-5k | 1 | |
| SMD LED 0603 | 1 |
You can use any sockets for the target microcontroller, but if you want to test the microcontroller without soldering I recommend spring pin headers or pogo pins (H032). When using H032 you will need to press them to ensure good contact.
Thanks to @ShyPsy for choosing and testing suitable pogo pins.
Parts
108| Qty | Value | Footprint | References |
|---|---|---|---|
| 64 | NPTH | NPTH | KiKit_MB_10_1, KiKit_MB_10_2, KiKit_MB_10_3, KiKit_MB_10_4, KiKit_MB_11_1, KiKit_MB_11_2, KiKit_MB_11_3, KiKit_MB_11_4, KiKit_MB_12_1, KiKit_MB_12_2, KiKit_MB_12_3, KiKit_MB_12_4, KiKit_MB_13_1, KiKit_MB_13_2, KiKit_MB_13_3, KiKit_MB_13_4 +48 |
| 16 | MountingHole | didSwitch:mountingHole_plate | H1, H1, H1, H1, H2, H2, H2, H2, H3, H3, H3, H3, H4, H4, H4, H4 |
| 12 | SW_Push | PNCATEHO:SW_3x4x2_2legs_duplex | SW1, SW1, SW1, SW1, SW2, SW2, SW2, SW2, SW3, SW3, SW3, SW3 |
| 8 | ProMicro_r | SuperMini_nRF52840_AH_Reversible | U1, U1, U1, U1, U2, U2, U2, U2 |
| 4 | LED | didSwitch:LED_0603_1608Metric_rev | VD1, VD1, VD1, VD1 |
| 4 | R | didSwitch:R_0603_1608Metric_rev | R1, R1, R1, R1 |
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Questions
How big is the Cn tester panel PCB?
It measures 87 × 87 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Cn tester panel use?
108 parts. 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 Cn tester panel KiCad files?
From the aroum/cn_tester repository on GitHub, at the commit this page was made from: the board is pcb/panel/cn_tester_panel.kicad_pcb and its schematic pcb/c!n_tester.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Cn tester panel 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).