Diy Polarity and Continuity Tester

This is my homemade polarity and continuity tester (max. 14 volts)
I used : 
2x Bright Leds
1x Resistor (depends on leds and voltage)
and some wires 
Circuit was made in multisim

Comments

[simplyconnected]

What you've built is a voltage checker with polarity indicator.
A continuity checker (like for checking fuses out of the circuit) has its own battery and it needs no polarity indicator.

What did you use for the body housing and probe?

[tutdude98]

old pen

[tutdude98]

Continuity tester is small battery