This space mark demodulator for FSK signals was found in an American telecommunication documentation from the 1980s. The circuit operates with 2025 Hz and 225 Hz mark space signals.
This circuit that mimics the sound of the famous Scottish instrument was found in a Popular...
The circuit shown is from the 1960 Mullard transistor reference manual. The circuit has a common...
The circuit we show is a water pump actuator that, in addition to being automatic, has a water...