I made a music box with some 555 timers and an old RAM chip
17:02
I built an electronic Etch-A-Sketch without a microcontroller
23:30
How my Etch-A-Sketch circuit works
27:18
Fixing my counter's bouncy button
17:35
I built every 555 circuit in the Forrest Mims Engineer's Mini Notebook - Part 1
12:48
Für Elise
24:31
Experimenting with static RAM
30:13
How a 555 Works as a Timer.
18:14