Electro meter by 2N3819 FET
Today we try to come to see the circuit checks the static electricity is simple. OR Electro meter by FET 2N3819. It can show the electricity bill dwells to follow the inventory that has the electric charge. Such as the plastic is , hand , etc. By detect far get 30 centimeter. Fine the value R1 give the meter can read the value 1mA. [...]
Source: Electro meter by 2N3819 FET
