Homemade AC Voltage Detector ⚡
➡️10 High-Quality PCBs for $5: https://www.pcbway.es/
In this project, we'll make a voltage detector or phase detector (non-contact voltage tester). To do this, we'll use a pencil. At the end, we'll leave the normal writing function and add the AC voltage detection function.
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➡️Materials:
3 x C945 Transistors
1 x 27A Battery
1 x 1K ohm 1/4 W Resistor
1 x 100 ohm 1/4 W resistor
-1 x 5 mm LED diode
-1 x 104 ceramic capacitor