This RCA / GE circuit from the 90s can be applied to any modern operational amplifier. The number of entries (installments) can be changed depending on the application.
This VCO or Voltage Controlled Oscillator uses common components. TR1 can be a BF245 and TR2 a...
The transformer for this project found in a 1986 documentation is an output type, found on old...
We found this circuit in a 1978 documentation. The SCR conducts when the regulator's output...