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| Advice for a Short circuit detector |
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| Greybeard:
--- Quote from: zanzeoo on January 05, 2023, 09:39:11 pm ---I thinking to buy or make a Short circuit detector more simple or less expensive. --- End quote --- Maybe DIY is a way to go: https://www.pa4tim.nl/?p=5339 https://www.edn.com/milliohm-squawker-great-at-finding-shorts-and-reverse-engineering-pcbs/ https://www.eevblog.com/forum/repair/diy-magnetic-probe-to-find-a-short/msg1329343/#msg1329343 https://web.archive.org/web/20060311135708/http://www.polarinstruments.com/manuals/service/Toneohm%20700%20and%20550%20Service%20manual.pdf |
| kripton2035:
you need 0.1mΩ resolution to find a short with enough spatial precision. I assume you did but are you using a 4 wires probes ? it's strange you don't find any differences with a milliohm meter. |
| 807:
If you have an LM317 handy, then here's a cheap way of doing it... |
| artag:
I was looking for a Toneohm. There are some on ebay but they're expensive - £3-400. But I've found a few Omnitest Hy Trak for 1/10 of that (eg https://www.ebay.co.uk/itm/225274209822). They appear to do nominally the same thing : measure milliohms with a display and a tracking audio tone. Are they equivalent ? I've read that Toneohm have some special technique for finding groundplane shorts but that might apply to only some models, and I don't know how good it is. |
| Miti:
How about this short finder project? I have one from jdobry and the troubleshooting technicians love it. https://www.eevblog.com/forum/testgear/finding-short-on-motherboards-with-a-shorty-(with-display)/ |
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