This circuit is the receiver for the previous transmitter modulated by an audio signal. The transducer is a ceramic capsule, in which case the circuit becomes ideal for telegraphic transmissions.
This well-designed phase shift oscillator configuration was found in ancient European...
A stereo digital mixer using the 4053 is built as shown in figure bellow. The IC must be powered...
The resistors R determine the frequencies of the oscillator together with C. The circuit is from a...