High Power Alarm (CB20475E)

We found this circuit in a Popular Electronics from the 90's. The circuit uses three SCRs to trigger the loads.

JK 4037 Flip Flop with Reset (CB25121E)
We found this circuit in the April 1988 issue of Radio Electronics magazine. The circuit can be...
Amplifier For Magnetic Phonocaptor (CB9514E)
This amplifier allows you to recover recorded tapes from a tape player that has the mechanism in...
SCR Simulator (CB16615E)
In the figure we have the way to simulate an SCR using two complementary general-purpose...