Light Activated OR Gate 1 (CB5319E)

This circuit uses two light-activated SCRs or LASCRs, uncommon components today. The power depends on the load. The maximum current is low.

Intercom (CB4572E)
I found this circuit in a July 1982 English magazine. The circuit is still viable by simply using...
Amplification Stage (CB6178E)
This small signal amplifier circuit was found in Motorola's 1969 documentation. The FET and the...
Three Transistor High Gain Amplifier (CB982E)
This circuit, found in a publication of the year 1968, uses a MOSFET at the input to increase...