Found in a PE Hobbyst Handbook, this circuit checks if there is voltage in a power outlet by emitting sound and lighting an LED.
This circuit was obtained in the 1979 publication 101 Electronics Projects. The circuit can be...
This circuit uses two sensors that are placed at the intersection of a miniature railroad, causing the LED...
This circuit causes the neon lamps in a set to flash randomly. Capacitors determine the speed of...