Actually it’s an ElectroMagnetic Pulse (EMP) Detector in the roughly 40-80 KHz range. When lightning discharges (flashes), it creates an immense EMP that can be detected up to 10-20 miles away.
This fun detector uses an Arduino Nano unit to display a waveform on the Serial Plotter built into the Arduino IDE.
When lightning is detected a blue LED flashes and a green LED indicator lights up.
When the pushbutton switch is depressed, the green LED extinguishes and then flashes the number of times a lightning strike was counted since the last button press,
For example, the unit counted seven lightning strikes. When queried (button pressed), the LED blinks seven times and the count resets to zero.
Photos to follow
