Cigar Tube Circuit Tester Demonstration - Switching Polarities

This is a supplemental video to our page titled "Make a Cigar Tube Circuit Tester".

This video is meant to demonstrate the cigar tube circuit tester one can learn to make at motbots.com. The way this circuit tester works in the video demonstration is by attaching the alligator clip probe to the negative terminal of a 9V battery. You then touch the paper clip probe at the end of the cigar tube handle to the positive terminal of the battery and then the white LED within the circuit tester's handle lights up, indicating a negative ground reading. Switch the probes around and the red LED lights up, indicating a positive ground reading.

Video for Blog Page: "Make a Cigar Tube Circuit Tester"
Page URL: https://motbots.com/make-a-cigar-tube-circuit-tester/
Description: This is a supplemental video for a post made on our website.
Website: https://motbots.com