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Continuity tester circuit diagram using LM3909

A very simple continuity tester electronic project can be designed using the LM3909 LED flasher integrated circuit .

This continuity tester project , require few external electronic parts and can be used for testing continuity of coils and cables .
This continuity tester project must be powered from a 1.5 volt DC power supply , you can use a 1.5 volts battery cell .

The C1 capacitor must have a value of 10uF an R1 resistor must a have a value of 1kohms . Speaker used for this project can be a small 8 ohms impedance speaker .
Simple electronic continuity tester project circuit using LM3909 IC

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