we'll show you how to build a simple yet effective Wireless AC Voltage Detector circuit using only two BC547 NPN transistors, one 100K resistor, one LED, and one 3.7V battery. This circuit can detect the presence of AC voltage in a circuit without requiring direct contact with the live wires.
The working principle of this circuit is based on the fact that the voltage applied to the base of the first transistor can be used to control the voltage level at the collector of the second transistor. When AC voltage is applied to the base of the first transistor, it acts as an amplifier to increase the voltage level of the signal. The second transistor further amplifies the signal and sends it to the LED circuit. The LED lights up when AC voltage is detected, and turns off when there is no AC voltage.
we'll show you how to build a simple yet effective Wireless AC Voltage Detector circuit using only two BC547 NPN transistors, one 100K resistor, one LED, and one 3.7V battery. This circuit can detect the presence of AC voltage in a circuit without requiring direct contact with the live wires.
The working principle of this circuit is based on the fact that the voltage applied to the base of the first transistor can be used to control the voltage level at the collector of the second transistor. When AC voltage is applied to the base of the first transistor, it acts as an amplifier to increase the voltage level of the signal. The second transistor further amplifies the signal and sends it to the LED circuit. The LED lights up when AC voltage is detected, and turns off when there is no AC voltage.
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