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- Newsgroups: sci.electronics
- Path: sparky!uunet!cs.utexas.edu!asuvax!ennews!enuxha.eas.asu.edu!gsulliva
- From: gsulliva@enuxha.eas.asu.edu (Glenn A Sullivan)
- Subject: Re: DMM w/inductance
- Message-ID: <1992Jul23.014806.17467@ennews.eas.asu.edu>
- Summary: Do you need a design for a 0.0 to 1.0 uH inductance meter?
- Sender: news@ennews.eas.asu.edu (USENET News System)
- Organization: Arizona State University
- References: <15421@ucdavis.ucdavis.edu>
- Date: Thu, 23 Jul 1992 01:48:06 GMT
- Lines: 19
-
- gbchoy@taco.ucdavis.edu (Garett Brandon Choy) writes:
- ....... [lots deleted]
- > trying to find a fairly good DMM that can read capacitance and INDUCTANCE.
-
- Inspired by an article in RF DESIGN magazine (good read by the way),
- I designed a CHEAP 1.0 microHenry Fullscale Inductance meter. Uses ONE IC,
- a NE602, a PNP, and some 2-sided PC board material. Runs at about 10MHz.
-
- Resolves 5 or 10 nanoHenries; uses phase-shift method (from RF DESIGN) to
- ignore resistance. Good at sorting 100 nanoH surface mount inductors, etc.
- Or measureing scope probe ground leads, or tweezers.
-
- You zero it with a 10 ohm resistor. Then calibrate it with some known coil
- Send mail, and I'll email the design.
-
- Allen Sullivan gsulliva@enusha.eas.asu.edu
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