Sesame

December 9, 2021 · View on GitHub

CC BY-NC-SA 4.0 kofibadge

Alice like ergo keyboard using only THT parts

drawing

Partslist

CountPartReferenceLCSC Part #
1ATmega32A 40 pin DIP (32L works too)U1C12703
140 pin DIP socket (optional but highly recommended)U1C2332
1USB4085-GF-A USB Type-C socketUSB1
1500 mA polyfuseF1C207122
26mm momentary push buttonsBoot,ResetC620202
116 MHz quartz crystalXTAL1C16212
14.7 uF electrolytic capacitorC1C47879
2100 nF ceramic disk capacitorC2,C3C254092
222 pF ceramic disk capacitorC4,C5C254096
11.5 kΩ resistorR1C58620
268 Ω resistorR2,R3C714279
25.1 kΩ resistorR4,R5C714593
110 kΩ resistorR6C119347
23.6 V zener diode (DO-35 BZX55C3V6)D1,D2C2508
66universal switching diode (DO-35 1N4148)D3-D68C14516

The USB port can be found here:
https://www.digikey.com/en/products/detail/gct/USB4085-GF-A/9859733


drawing drawing

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

CC BY-NC-SA 4.0