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| dual usb charger | |
| Electro meter circuit |
| 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.  circuit 2N3819 data sheet Data sheet in pdf file format. This is a 2N3819 from Fairchild semiconductor. |
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