This is a simple electro meter circuit.This circuit will detect electrostatic charge from the any material such plastic,comb etc.
It can measure up to 30 cm from the target material. To use this circuit first adjust R2 when the antenna near the material until Amp meter read 1 mA. Link
Electro meter circuit Diagram
It can measure up to 30 cm from the target material. To use this circuit first adjust R2 when the antenna near the material until Amp meter read 1 mA. Link
Electro meter circuit Diagram
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