This simple and economical Dew Detector Probe circuit works on 5V dc supply. It is useful for checking the presence of dew (condensed moisture) inside sensitive electronic devices like VTR, Camera,C ...

For casual ESD detection, the “rubber duck” antenna (shown above) also works OK. The detector will sense ESD events within several feet and lightning within 2-3 miles. It makes a great tool when ...

This is connected to a basic transistor flasher circuit, ... That site has several other lightning detector circuits on it and a lot more information. Report comment. Reply. Jim says: ...

Circuit Combines DC High-Voltage Drop Detector, Undervoltage Alarm Dec. 14, 2010 Description of a circuit to tell if the high-voltage supply in an industrial smokestack precipitator is functioning ...