This circuit activates a horn from an audio signal. This can be used for remote control via audio signals. The circuit is from a Radio Electronics from October 1965.
This circuit is from 2001 documentation and consists of a small FM transmitter with two inputs, one...
This small source for low consumption projects was found in an old national documentation. The...
We found this receiver for medium and short waves in a publication from the 1980s. The medium wave...