This interesting circuit of the 50s uses a fluorescent lamp to obtain a stroboscope useful for the rotation of motors. The circuit uses a power valve to control the 10W fluorescent lamp.
This low frequency doubler requires a 50 mV signal at the input. The circuit is from an old...
We found this circuit in GE's 1977 transistors manual. Transistors admit equivalents according to the...
This transistor tester circuit has the advantage of using a constant current source in the tests....