2 layers70.7 × 43.8 mm

BulkyModem UserPort Adapter
tebl/BulkyModem
My significantly more expensive, slightly less capable version of the Zimodem-hardware. Surfing the BBS-world at a blazing 1200 baud (or faster)!
27 parts11
KiCad boards from 13 GitHub repositories tagged “rs232”, the most starred first; open any of them in PCBKit.

tebl/BulkyModem
My significantly more expensive, slightly less capable version of the Zimodem-hardware. Surfing the BBS-world at a blazing 1200 baud (or faster)!

Enapter/ucm-kit-open-hardware
Enapter UCM Kit – open hardware for connecting your energy devices.