DC Control with a Raystor (CB6325E)

Raystor is a component of the 1960s Raytheon. It consists of a light coupler that allows you to use the circuit as a DC control for signals as shown.

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VCO TTL with the 74123 (CB13135E)
The 74123 TTL integrated circuit consists of a monostable that can be configured to generate...
VCO (CB11518E)
This VCO or Voltage Controlled Oscillator was found in a Popular Electronics from 1991 but can be...
Power supply for the previous amplifier (CB23636E)
In the figure we have the power supply for the 8 W amplifier in the previous circuit. The circuit...