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.
The purpose of this project is to monitor remote loads. The windings are made in a burnt...
This circuit with germanium transistors was found in documentation from the 50's. The transistors are...
This voice scrambler is used to obtain effects in the 2.5 to 5 kHz range. The circuit is from...