Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!bu.edu!purdue!news.cs.indiana.edu!news.nd.edu!spool.mu.edu!sdd.hp.com!cs.utexas.edu!asuvax!mcdphx!citek.mcdphx.mot.com!hbg6 From: hbg6@citek.mcdphx.mot.com Newsgroups: sci.electronics Subject: Re:Burglar alarm on an electronic thermometer. Message-ID: <14822@mcdphx.phx.mcd.mot.com> Date: 9 Apr 91 16:41:32 GMT Sender: listen@mcdphx.phx.mcd.mot.com Reply-To: hbg6@citek.mcdphx.mot.com Organization: Motorola Microcomputer Division, Tempe, Az. Lines: 17 In article maddog@oneb.wimsey.bc.ca writes: > a 2 cm long piece of metal embedded in the plastic. >QUESTION - Could there be some sort of magnetic induction switch > functioning here ? I have seen a hand-held meter that had a drop-in recharger that had no electrical connections. Essentially there is a transformer with the primary in the base and the secondary in the hand-held portion. John ..................................................................... Have fun, Play nice, Don't fight. OK Dad. ..................................................................... John Schuch - Motorola Inc., Computer Systems Division (602)438-3008 All opinions expressed are mine and not Motorolas, their loss. .....................................................................