How to make voltage detector

how to make voltage detector; electrical wires tester from a distance;
voltage detector

electrical wires tester from a distance (voltage detector) : It is a small device that checks electrical wires is it conductive or it cut or damaged.

The wire tester consists of a small and simple electronic circuit, and it can be made easily, as shown in the following video:

Electronic components needed :

To make this electronic circuit we need these following components

  • 3 Transistor NPN C945
  • 1 Led
  • 1 Resistance ( between: 220 Ohm – 560 Ohm )
  • 1 Copper wire ( between: 10cm – 15cm )
  • 1 small wire
  • 5V source ( battery or charger )


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