AC.gadget-15Segment

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AC.gadget-15Segment

Showing a scrolling text on 15 segment displays (5 digits) I got from a friend IN THE 80s (gasp!). IO multiplexing with three 8 bit shift registers, using PNP transistors to drive the LEDs. Wiring with display took most of the time, followed by the array of transistors and associated resistors for limiting base and LED current.

The displays (disclaimer: increased contrast)
Wiring on the back of the display board
The main board with Arduino and ESP8266 removed


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