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Article #9207Re: 12V car --> 3V cd player
From: Wm Randolph Franklin
Date: Mon, 31 Dec 1990 21:46
Date: Mon, 31 Dec 1990 21:46
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In article <2374@casbah.acns.nwu.edu> squishy@casbah.acns.nwu.edu (Shishin Yamada) writes: > >+12V Fuse L1 1 _________ 2 D1 D2 D3 >O-------O~O---UUUUU---+------+---| |-----+---->|--->|--->|----O +3V > +| | | 7805 | | > === === |_______| === C3 >Ground | C1 | C2 |3 | >O---------------------+------+-------+---------+--------------------O Ground > > Where, L1 is say 1 uH, C1 is say 2200uF, C2 is 0.33uF, C3 is 0.1uF, >D1 D2 and D3 are silicon rectifying diodes (like 1N4001). All components >should be rated at least to 16 volts. What does C2 do since it's so much smaller than C1? My guess it that it also has a smaller inductance and so traps hi freqs better. Is this right? Thanks. -- Wm. Randolph Franklin Internet: wrf@ecse.rpi.edu (or @cs.rpi.edu) Bitnet: Wrfrankl@Rpitsmts Telephone: (518) 276-6077; Telex: 6716050 RPI TROU; Fax: (518) 276-6261 Paper: ECSE Dept., 6026 JEC, Rensselaer Polytechnic Inst, Troy NY, 12180
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!rpi!wrf From: wrf@mab.ecse.rpi.edu (Wm Randolph Franklin) Newsgroups: sci.electronics Subject: Re: 12V car --> 3V cd player Keywords: CD, cd, cd player, car, power supply Message-ID: <%BS^BG*@rpi.edu> Date: 31 Dec 90 21:46:44 GMT References: <1990Dec29.070556.7022@qiclab.uucp> <1990Dec31.081024.16910@yenta.alb.nm.us> <2374@casbah.acns.nwu.edu> Organization: Rensselaer Polytechnic Institute, Troy NY Lines: 22 Nntp-Posting-Host: mab.ecse.rpi.edu