How to make continuity tester from ball pen

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You can test by it wire,coil,transistors,diode,bulb etc. please use it to test without power supply otherwise it will burn. for details visit http://technoreview85.blogspot.in/ our face book page https://www.facebook.com/trv85/ ******************************************************************** music from - Easy Jam by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100245 Artist: http://incompetech.com/

Published by: Technoreview85 Published at: 7 years ago Category: علمی و تکنولوژی
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