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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.  
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)
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)




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