Genovation Micropad rebuilt with Pololu A-Star MicroThis is the second Parallel Micropad 621 I have rebuilt to be USB instead of Parallel. I used a Pro Micro and jumper cables for the first conversion. This time I added a female socket header to one side of an A-Star Micro. The A-Star Micro has a different pinout than the Pro Micro. The entire left half of the board is i/o pins. I used pins 1-9 for the 9 connections to the matrix on the Micropad. The result is very clean, no jumper wires.
All that is needed now is a USB cable and some cable management.
The JSON file I used on kbfirmware.com is here, as well as the compiled hex.
More information on the disassembly of the Micropad and the matrix can be seen in the original post.