A continuity tester is an item of electrical test equipment used to determine if an electrical path can be established between two points; that is if an electrical circuit can be made. This is simple continuity tester circuit diagram.

Simple Continuity Tester Circuit Diagram

simple continuity tester circuit diagram
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Parts List For Continuity Tester Circuit

  • Parts List:- Transistor BC547/548/2n2222 or any NPN Transistor
  • Diode IN4001-4007 1pc, LED any color
  • Resistor 1k, 100k, 100ohm 1pc each
  • 3volt battery (comos Battery/cell)
  • Probes red and Black or you can use wire also

How To Make Simple Component Tester Watch the Video