This circuit is from Radio Electronics from March 1977. The integrated circuit is from that time and the circuit is intended for an infrared audio link. The modulation is in pulse frequency.
This circuit behaves like a capacitor whose value is C1 multiplied by the relationship between R1 and...
This circuit of an old 1968 magazine aims to synchronize a slide projector with a recording, but...
This switching power supply was found in an Electronic Design from the 90s. The components are...