After using my last commercially made isolated TTL serial to USB converter for my last project, with no hopes of it being re-stocked in the near future. I decided to try building my own version of the device.

Barbouri's Electronics Projects
Restoring vintage electronics along with designing and building new circuits. One eye looking into the past, the other looking into the future.
After using my last commercially made isolated TTL serial to USB converter for my last project, with no hopes of it being re-stocked in the near future. I decided to try building my own version of the device.
After five years and a few prototype revisions of the Version 2.12 Programmable Voltage reference, I decided it was time to update the project based on many requests and lessons learned from prototypes over the years.
After building the ASCII Video Terminal Kit, I decided to create an updated circuit board based on the original Geoff Graham ASCII Video Terminal project, which was then later updated by Peter Hizalev and sold on Tindie.