This decorative circuit was found in the July 1994 issue of Electronics Now magazine. It makes LEDs blink in a face-shaped allegory. The frequencies are given by the capacitors in the oscillators.
The circuit in the figure is from a source with the possibility to adjust the output voltage from...
We found this circuit in an old magazine 73 of 1974. The circuit must be powered by a continuous voltage...
This circuit is from a 1987 American publication called Electronics Handbook. The circuit can be...