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

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