We found these circuits in a Popular Electronics from the 90s. The circuit has a simple low power version and a higher power version with MOSFET (VMOS) of the time.
This different configuration of AM radio with push pull detection and amplification provides good...
This light intensity meter is from a 1978 Texas Instruments optoelectronics manual. The...
This circuit fires a xenon lamp being powered by a 300 V battery. The circuit is from a Radio...