Undervoltage alarm (CB8480E)

This circuit sounds when the input voltage drops below the value determined by the zener. The circuit is from a 90s American documentation.

| Clique na imagem para ampliar |

Broadband Amplifier (CB25043E)
This circuit for RF signals was found in the March 1987 issue of Radio Electronics magazine. The...
TLC272 Peak Detector (2) (CB11541E)
We found this circuit in Texas Instruments' Linear Circuits Applications. It is a low consumption peak...
Simple Diode Radio (CB19592E)
This medium wave radio must use a high impedance piezoelectric, crystal or magnetic phone and the...