Article View: sci.electronics
Article #9663Re: Light-Dimmer Noise, was Re: Ferrite Beads
From: Marvin Minsky
Date: Wed, 23 Jan 1991 04:59
Date: Wed, 23 Jan 1991 04:59
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In article <1007@eplunix.UUCP> raoul@eplunix.UUCP (Nico Garcia) writes: >In article <4931@media-lab.MEDIA.MIT.EDU>, minsky@media-lab.MEDIA.MIT.EDU (Marvin Minsky) writes: >> Sorry about last message. Does anyone know if ferrite beads can >> reduce the RF noise from light-dimming devices? > >We avoided the whole issue and replaced the SCR light-dimmers with the >bulky, hairy old linear light dimmers. They work great and don't make >the occasional buzzing noise of the SCR's, which was a problem for our >audio experiments. How do the "linear" ones work? A rheostat would be too hot, and a variac too expensive (not really) -- and both are too large to fit in a standard domestic switch-box.
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arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!think.com!snorkelwacker.mit.edu!mit-eddie!media-lab!minskyReferences:
<1991Jan18.162458.29063@bronze.ucs.indiana.edu> <4931@media-lab.MEDIA.MIT.EDU> <1007@eplunix.UUCP>Show Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!think.com!snorkelwacker.mit.edu!mit-eddie!media-lab!minsky From: minsky@media-lab.MEDIA.MIT.EDU (Marvin Minsky) Newsgroups: sci.electronics Subject: Re: Light-Dimmer Noise, was Re: Ferrite Beads Message-ID: <4992@media-lab.MEDIA.MIT.EDU> Date: 23 Jan 91 04:59:50 GMT References: <1991Jan18.162458.29063@bronze.ucs.indiana.edu> <4931@media-lab.MEDIA.MIT.EDU> <1007@eplunix.UUCP> Reply-To: minsky@media-lab.media.mit.edu (Marvin Minsky) Organization: MIT Media Lab, Cambridge MA Lines: 12