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Article #22501Re: Teddy Ruxpin's Audio Frequency Modulatinon
From: Mark Zenier
Date: Fri, 02 Mar 1990 19:08
Date: Fri, 02 Mar 1990 19:08
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In article <12595@nigel.udel.EDU>, berryh@udel.edu (John Berryhill) writes: > > The data packets are about 8 milliseconds > long with 4 milliseconds between them. Inside each packet is some > sort of triangle wave that has a variable delay at the upward zero > crossing, i.e. > ... > Has anybody out there managed to figure out what sort of modulation > this sucker uses? One of the winners in the Circuit Cellar Ink design contest last year was a project for generating Teddy Ruxpin data. They havn't published the details yet. It looks like the pulse postion modulation used in radio control, where the analog value is encoded in the time between pulses. markz@ssc.uucp
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arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!uwm.edu!ogicse!blake!milton!uw-beaver!uw-entropy!dataio!pilchuck!ssc!markzReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!uwm.edu!ogicse!blake!milton!uw-beaver!uw-entropy!dataio!pilchuck!ssc!markz From: markz@ssc.UUCP (Mark Zenier) Newsgroups: sci.electronics Subject: Re: Teddy Ruxpin's Audio Frequency Modulatinon Message-ID: <519@ssc.UUCP> Date: 2 Mar 90 19:08:50 GMT References: <12595@nigel.udel.EDU> Organization: SSC, Inc., Seattle, WA Lines: 18