HardLabs

Pin check

htpkbs·pin-check·pcb/pin-check.kicad_pcb

Pin check PCB layout, top view — open source AVR/Arduino board by htpkbs

About the Pin check PCB

Pin check is an open source AVR/Arduino PCB design by htpkbs, published on GitHub under the BSD-2-Clause license. It is a 2-layer board measuring 76.2 × 53.3 mm, with 32 components from 20 distinct parts.

Its main chip is the ATmega328P-PU, from the AVR/Arduino family. By type, the board carries 8 resistors, 6 switches, 6 diodes, 5 capacitors, 4 connectors and 1 IC.

It belongs with the keyboards designs in this gallery.

From the project

A small PCB for hand-wired keyboards that uses all through-hole components.

Overview DIY PCB Components Bootloader Acrylic Window Building the Kit Designing a Keyboard QMK Acknowledgments and Sublicenses

The pin-check is a printed circuit board (PCB) for hand-wired keyboards that uses all through-hole components, and supports QMK firmware, MX or Alps keyswitches, and split layouts. The keyswitch spacing is 19.05 mm and the USB connector is USB-C.

Pin check, from the project README
From the project README

Main components on the Pin check

ATmega328P-PU

Pin check bill of materials (BOM)

32 components, 20 distinct parts.

QtyPartRefs
1
ATmega328P-PU
U1
1
16MHz
Y1
1
AVR-ISP-6
J1
1
SJ-43514
J2
1
Conn_01x04
J3
1
USB_C_Receptacle_USB2.0
P1
1
100mA
F1
4
MX-NoLED
SW1, SW2, SW3, SW4
1
Reset
SW7
1
Boot
SW8
4
1N4148
D1, D2, D3, D4
2
3.6V
D7, D8
2
22pF
C1, C2
1
4.7u
C3
2
0.1u
C4, C5
1
10k
R1
2
5.1k
R2, R3
1
1.5k
R4
2
75R
R5, R6
2
4.7k
R7, R8

Pin check design files

The KiCad project lives in the htpkbs/pin-check repository on GitHub; these links point at the commit this page was built from.

Pin check: common questions

What microcontroller does the Pin check use?

The Pin check is built around the ATmega328P-PU, from the AVR/Arduino family.

How big is the Pin check PCB?

The Pin check measures 76.2 × 53.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Pin check?

32 components, from 20 distinct parts. The full bill of materials is listed on this page.

Where can I download the Pin check design files?

From the htpkbs/pin-check repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Pin check design in my own project?

Yes, under the terms of its BSD-2-Clause license, which htpkbs chose for the repository.

Can I test firmware for the Pin check without the hardware?

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

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