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 circuit, which can be used as a shield, was found in a 1980s documentation. The circuit can be...
Found in an English documentation from the 90's, this oscillator has the frequency given by the LC...
This circuit was found in a 1970 IEEE publication. The circuit functions as a voltage controlled...