This circuit provides a signal when dialing occurs. The circuit is powered by the telephone line voltage itself. We found it in an old documentation.
This circuit was found in a 1965 Electronic Design. What it does is respond only to positive...
This relaxation oscillator, simulated in the Multisim Blue, produces two different signals. The...
This VCO or Voltage Controlled Oscillator was found in a Popular Electronics from 1991 but can be...