This circuit is from an old documentation from the 80's. The circuit provides an output signal for a warning or alarm system that indicates when a fuse or circuit breaker opens.
This circuit generates sinusoidal signals from 15 Hz to 15 kHz. The circuit is from Electronics Now...
This circuit was obtained in a Radio Shack documentation from 1977. The circuit generates a...
This bird circuit found in several versions on this site uses a light sensor (LDR) firing when the...