Homemade Non-contact Voltage Tester
Автор: Thomas Kim
Загружено: 2018-05-25
Просмотров: 152509
Описание:
This is very cheap Non-contact Voltage Detector.
It can detect AC 110V and more voltage.
This device was tested at AC 110V, 220V, 380V, 430V, 480V, 2,000V, 6,600V, 13,200V, 25,000V, 154,000V, 345,000V.
Non-contact voltage testers work by sensing a very small amount of current that is capacitively coupled from the live circuit to the tester and back to ground. Non-contact voltage testers light up when they detect this current without needing to make direct contact.
A built-in sensor at the tip of the tester detects the presence of voltage when touching a conductor, outlet, or supply cord. By holding the tool, you are the ground reference through capacitive coupling. When the tip glows red and the unit beeps, you know voltage is present.
Materials :
1. AAA 1.5V Battery - 2EA
2. C1815 NPN transistor - 2EA
3. A1015 PNP Transistor - 1EA
4. 1N4007 Diode - 1EA
5. Red LED - 1EA
6. 10V 220V Electrolytic Capacitor - 1EA
7. 2.2kΩ 1/8W Resistor - 2EA
8. 20 Ω 1/8W Resistor - 1EA
9. Buzzer - 1EA
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