The Charging Bay Indicators where developed by Michael Erwin.
There’s an updated an even a full digital version available. Check out the related articles.
Available at shop.printed-droid.com
General Information
The CBI (+ DPL) are similar to Teeces. They run of a Arduino breakout board.
The best one would be the Arduino Pro Mini Breakoutboard.
Because it has a second input for voltage measurement that is displayed via the 3 LEDs on Led 21-23.
The are many sketches for this, but i found only one to be good enough to run both Displays (CBI & DPL) in a good way.
These boards only take 5V!
Component list:
Astromech Threads:
https://astromech.net/forums/showthread.php?7946-Charging-Bay-Indicators-A-HW-extension-for-Teeces-v3
https://astromech.net/forums/showthread.php?13542-Help-with-Charging-Bay-Indicator-and-Data-Port-Logics