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 small power supply with selenium diode appeared in Radio Electronics in October 1958. The...
This circuit consists of a frequency-voltage converter. The circuit can be used as the basis for...
This circuit of old documentation can be implemented with modern operational amplifiers. The...