This circuit be Basic Timer Circuit by use important equipment is FET 2N3819. By this circuit can can delay long ago arrive at 1.5 minute. Stand S1 at a position Reset an electric bell will loud. Totter S1 come back at time an electric bell will silent until time drag will stop electric bell talk [...]
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 [...]
This circuit be Audio Mixer Circuit by FET 2N3819 numbers, build easy and the a little equipment. By this circuit lets to use the microphone since two go up or use other tool all right wasp suit amplifier same microphone. The R1 and R5 will control value reduction input each beside. Thus R1 , and [...]
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