Placed near a common receiver, this oscillator is intended to generate a beating signal to receive RTTY or SSB communications. The circuit is from old telecommunications documentation.
We found this circuit in a 1982 documentation, but the circuit can still be easily assembled, as the...
This circuit uses the SQ3524, a switching integrated circuit. The circuit was found in the April...
This circuit is intended for the use as modulated light signals from digital sources. The circuit...