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.

Capacitor Test (CB4825E)
In this circuit the capacitor under test is charged at switch position A and then discharged...
DC lamp dimmer (CB6846E)
Found in a Motorola manual from the 1980s, this circuit uses components from the era. The circuit...
76 dB Gain Preamplifier (CB25695E)
This high-gain amplifier was found in the March 1994 issue of Electronics Now magazine. The...