Uploaded January 2023 | Updated September 2026, 2 hours ago
! -Getting close to high voltage lines is very Dangerous - !
Static electricity is high voltage.
The high-voltage transmission tower periodically changes its polarity so Electrostatic Polarity Detector is two LEDs appear to on.
In fact, they alternately turn on and off 60 times per second. (60Hz AC)
! -Getting close to high voltage lines is very Dangerous - !
Static electricity is high voltage.
The high-voltage transmission tower periodically changes its polarity so Electrostatic Polarity Detector is two LEDs appear to on.
In fact, they alternately turn on and off 60 times per second. (60Hz AC)






![12V car bulb connect to 220V directly
This is series capacitor current limit circuit. Widely used in transformerless power supply.
However, it is dangerous because of the high potential difference with the ground.
In this kind of circuit, may damage the bulb by over current flows due to harmonics. (Current : 2 × π × f × C × V [A] ) 12V car bulb connect to 220V directly](https://i.ytimg.com/vi/4HI3JEzjyu8/mqdefault.jpg)



