This RF circuit measures transmission power from 0.25 W to 10 W. The maximum frequency depends on the diode and the gauge is an analog instrument. A multimeter can be used instead.
This circuit is from a 1957 Raytheon transistor manual. The diode can be of general-purpose...
This proximity switch or approach relay uses only transistors and directly controls a Triac. The...
The circuit presented here shows how two flip-flops of a 4027 can be connected to perform a...