Anyone, and I mean, anyone can build a conductivity meter from 2 stripes of wire 1 battery and 1 LED...Originally Posted by vibez
just simply connect 1 stripe to the negative pole of the battery, connect the positive pole (longer lead) of the LED to the positive pole of the battery and finally connect the other stripe to the negative pole of the LED - that’s it!
Now whenever you connect both ends to a conducting peace (close the circuitry) the LED must light up and you know which is connected were...
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