This circuit causes an LED to flash at a frequency determined by the capacitor. The circuit is powered by only 3 V and can be used for signaling.
This circuit was found in General Electric documentation from the 1980s. The circuit uses couplers...
Designed for the audio track, this circuit was found in a Popular Electronics from the 90's. Other...
The sound of this experimental musical instrument is produced by the movement of the hand in front...