An old “scripting” LED sign I built back in the early 80’s.04:33

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Published on November 30, 2017

This was just one of “those” projects that I did for fun. The first one that used a lot of very dim but expensive LEDs at that time.
The design is based on a string of six 4015 dual 4-bit shift registers cascaded into one big 48 bit one. It drives clusters of LEDs with buffer transistors.

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