The input and output frequencies of this circuit depend on the coils and capacitors of the tuned circuits. The circuit is from Electronics Now magazine, February 1997.
This frequency modulated light transmitter is from a 1990s documentation. The circuit may use...
The basis of this circuit is an LM380 that drives a speaker that emits sound when moisture is...
This precision circuit can provide timings from 0.2 milliseconds to 3 minutes accurately. The...