This circuit was obtained in an old Popular Electronics. It makes use of quite common components. The speed of the effect is set to R7. The circuit drives 20 LEDs.
This memory flip-flop must be powered by 5V voltage. The circuit stores 1 bit. ...
This circuit was found in a RCA documentation from 1977. The integrated circuit is uncommon today. It is...
The output of this super-regenerative circuit must be connected to an audio amplifier. The coil...