Originally created to power an 80's RTTY printer, this circuit can be used in other applications. The circuit is from an Amateur radio of the time.
This circuit uses a common multimeter on the voltage scale. The calibration of the scale should be...
This circuit is intended to drive bistable relays and can be used as a shield for...
This circuit was found in a PE Hobbyst Handbook of 1989. It uses a black light fluorescent of the time....