Uploaded June 2017 | Updated September 2026, 22 minutes ago

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This is a simple Electrostatic Polarity Detector(Electric Field Detector) made of FDS8958A Chip.
This chip(FDS8958A) contains N- and P- Channel Enhancement mode power field effect transistors.
Old Version : Using 9V battery.
New Version : Using 3V battery.
The circuit diagram appears on the video. 07:13
Lightning detector : youtu.be/ZH_awUu3b-c