Oli W 🌱Apr 22, 2023

Taking a punt on a custom prototyping board design with an #rc2014 slant.

Only 38 pins wide as it's a push to fit 40 on the 100x100mm $5 form factor at the well known PCB house.

It's based on Troy Schrapel's HBC-56 design (https://github.com/visrealm/hbc-56/tree/master/schematics/proto). Took me *ages* to recreate it in KiCad from the picture of the original board.

hbc-56/schematics/proto at master · visrealm/hbc-56

Homebrew 6502 on a backplane computer. Contribute to visrealm/hbc-56 development by creating an account on GitHub.

GitHub
Show threadRC2014Apr 22, 2023

@evolutional People often question why the standard RC2014 modules are (barely) 39 pins.

At the time, 100mm limits were a lot more common with PCB manufacturers than they are today. Also, a lot of people used Eagle back then, which was free for hobby use up to 100x100mm.

Show threadOli W 🌱Apr 22, 2023
@rc2014 the cost from 100mm to 100.1mm is $5 for 10 to $30 for 10, so adds up...
Show threadOli W 🌱
@rc2014 I also imagine the DRC warnings you get on every job, those through holes are slightly clipped 😂
Apr 22, 2023 at 7:19pmWeb
Show threadRC2014Apr 22, 2023
@evolutional
DRC are only suggestions. Right? 😬
Show threadOli W 🌱Apr 22, 2023
@rc2014 meh if it gets another pin in there, why not.