Static Electricity Detector - Can Sense a Hairbrush From 2 Meters [DIY]

How to make a simple static electricity sensor using transistors. This device has a simple circuit. For building this device you will need: 1. J310 (N-channel JFET) 2. BC547B (NPN bipolar transistor) 3. 10K resistor (you can use  ... ) 4. Active Buzzer