Editing OtherElectronicProjects
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http://electronicdesign.com/Articles/ArticleID/19871/19871.html | http://electronicdesign.com/Articles/ArticleID/19871/19871.html | ||
check out Schottky and germanium diodes if you are concerned with forward voltage drop. | check out Schottky and germanium diodes if you are concerned with forward voltage drop. The parasitic diodes in MOSFETs have large parasitic capacitances and long recovery times. | ||
"Ultimate Continuity Tester", per Electronic Design, October 2, 2008: The article claims normal continuity testers trigger through connections of as much as a few hundred Ohms, which sometimes is too crude. Sometimes what's needed is a continuity detector that will not trigger through as little as ten Ohms. The circuit described is cheap, robust, and very sensitive. I'd like to try to build this. | "Ultimate Continuity Tester", per Electronic Design, October 2, 2008: The article claims normal continuity testers trigger through connections of as much as a few hundred Ohms, which sometimes is too crude. Sometimes what's needed is a continuity detector that will not trigger through as little as ten Ohms. The circuit described is cheap, robust, and very sensitive. I'd like to try to build this. | ||
http://electronicdesign.com/Articles/Index.cfm?AD=1&ArticleID=19768&bypass=1 | http://electronicdesign.com/Articles/Index.cfm?AD=1&ArticleID=19768&bypass=1 | ||
Sounds like you care about the actual resistance, which you can easily measure with an ohmmeter. | Sounds like you care about the actual resistance, which you can easily measure with an ohmmeter. Something you could do is make a 555 audio oscillator with resistance across the test probes influencing the frequency. That would give you audible feedback of magnitude rather than a binary go/no-go test. [[User:67.101.45.157|67.101.45.157]] 19:58, 27 October 2008 (PDT) | ||