81 LED Chaser with 2 NE555s!!
This is a variation on a well known circuit making this rather boring display much more interesting! In fact, what I added was a variable speed option for the Y-axis of the display. Normally it only has variable speed on the X-axis. Watch the video and all will be explained!
You can find the circuit schematics here:
https://www.flickr.com/photos/ededitz...
I've written an in depth article, showing the oscilloscope readouts of the pulses and pictures of the end product nicely built into a box with proper knobs and switches. You can read that here:
http://www.eddybergman.com/2017/09/81...