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.

2 V Regulator (CB1160E)
This circuit is suggested by Texas Instruments in its Linear Circuits Applications. It is a...
2 Transistor Radio (CB23668E)
In the figure we have the diagram of a simple transistor radio for the medium wave band. The...
4011 Bistable (CB10929E)
This circuit was obtained in a 1991 Electronics Handbook. The publication no longer exists, but...