Introduction: Mains Hum Detector / Static Electricity Detector
This instructable is about a small and easy circuit which detects Mains Hum i.e you can detect where mains wires are located from outside of the wall.It also detects Static Electricity and also can be disguised as a Ghost Detector.
So,Just follow the steps and you can build it in no time!
Step 1: Equipments Required
This components are required:-
1. 3 X BC547 NPN TRANSISTORS
2. 1 X 5mm LED(Any Colour)
3. 1 X 220 Ohm Resistor
4. 1 X 100k Ohm Resistor
5. 1 X 1M Ohm Resistor
6. 6-8mm Thick Strong Copper Wire(Must be Rigid) For Antenna
8. A 9volt Battery
Step 2: Circuit Diagram
Here is the circuit diagram.
This project is based from talkingelectronics.com.
Step 3: Complete!
If you touch the antenna wire,the led's gonna glow.
Make sure you strip 1cm of the antenna.
You can make various antenna to increase the sensitivity.
Hope you enjoyed this instructable.
Please Comment if you have any problems.