swiftrax / m0110a_usb

QMK powered drop-in replacement PCB for the Apple M0110a

M0110a USB

QMK compatible drop-in replacement PCB for the Apple M0110a

The PCB is built entirely with THT parts to keep a somewhat "vintage" look to it and it uses the fullsize 40-pin DIP package ATmega32A. The controller is placed in the exact same location as the one on the original PCB meaning that it can be accessed through the plate cutout under the spacebar.

The board is now fully tested and works absolutely perfect. Firmware and a guide on how to flash the bootloader and firmware will be added soon.

Partslist

Count	Part
1	ATmega32A 40 pin DIP (32L works too)
1	40 pin DIP socket (optional but highly recommended)
1	2x3 pin header 2.54mm (for ISP flashing)
1	3mm LED (any color should work)
1	JST PH 2mm 4pin connector + cable
1	mini usb breakout board
1	500 mA polyfuse
2	6mm momentary push buttons
1	16 MHz quarz crystal
1	4.7 uF electrolytic capacitor
2	100 nF ceramic disk capacitor
2	22 pF ceramic disk capacitor
1	10 kΩ resistor
2	68 Ω resistor
2	1.5 kΩ resistor
2	3.6 V zener diode (DO-35 BZX55C3V6)
78	universal switching diode (DO-35 1N4148)

Some pictures of the first finished PCB

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.