This 4-waveband converter circuit was found in Radio Craft September 1948. The power supply is not given, but the supply voltages are indicated.
We found this simple continuity tester in a 1995 documentation. It uses two LEDs to indicate...
We found this oscillator in the 1994 National Semiconductor Handbook of Linear Applications. The...
This circuit was found in a 90s Electronic Design. The circuit directly controls a triac that is...