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.

RF detector (CB17363E)
This circuit allows the detection of RF signals using the lowest range of direct currents of a...
Frequency DoublerB 150 to 300 MHz (CB19930E)
The MC496 integrated circuit used in this application is not common today. Motorola's circuit...
Voltage level circuit (CB7909E)
This window comparator circuit was found in a Popular Electronics from the 90s. The circuit has a...