User talk:RogerAF

From OpenCircuits
(Difference between revisions)
Jump to: navigation, search
(Undo revision 15955 by 89.28.127.255 (Talk))
 
(6 intermediate revisions by 5 users not shown)
Line 1: Line 1:
[http://manitoba-canine.ca/forms/use/Feedback/images/lioloal.html composer ringtones for sony ericsson z200] [http://bobshea.com/wp-content/uploads/2005/avatars/mexdevie.html chicago bulls ringtones] [http://yihan.com.tw/book/data/docs/elreltroc.html reggae polyphonic ringtones] [http://sandsoftime.org/gallery/g2data/cache/images/rerolr.html hip hop midi ringtone] [http://antiartist.ca/wp-content/uploads/2007/07/pics/wacelounr.html the oc ringtone free] [http://ericandersontravel.com/travel/originals/thumbs/zarcare.html christian ringtones verizon] [http://jensenmotorsport.com/mail/attachments/files/plgolelfe.html tejano ringtones] [http://ericandersontravel.com/travel/originals/thumbs/roetbrch.html crazy frong ringtone] [http://uwamu.com/bak3/post/cawtaeltr.html tamilsongs ringtones] [http://thespicecafe.com/wp-content/uploads/2007/08/thumbs/plcoro.html sch a850 ringtones] [http://sandio.com.tw/discuz/forumdata/templates/stats/enfokn.html real sound ringtones uk] [http://swndp.ca/contact/forms/files/tmp/ricale.html audiovox 8910 ringtones download] [http://manitoba-canine.ca/forms/use/Feedback/images/monliacel.html 3587i free nokia ringtone] [http://yihan.com.tw/book/data/docs/orense.html v551 mp3 ringtones] [http://tw-dclub.com/forum/images/avatars/upload/gif/cac4twa.html cellular lg ringtone] [http://coloursnshade.com/parser/images/rolsafufo.html ntelos real ringtone song] [http://tw-dclub.com/forum/images/avatars/upload/gif/getviboca.html charge cingular free no ringtone] [http://cistus-associacio.org/imgcms/icons/fokolori.html ringtone growing pains] [http://jensenmotorsport.com/mail/attachments/files/fevfiel.html free ringtones for cincinnati bell wireless] [http://swndp.ca/contact/forms/files/tmp/letonos.html vtech vmix ringtones] [http://sandio.com.tw/discuz/forumdata/templates/stats/sitkonrq.html joe 90 ringtone] [http://www.vandomburg.net/wp-content/themes/basic-concept/scripts/decnazarm.html free motorola ringtone send t720i] [http://etherealdreams.org/forum/images/avatars/gallery/pics/domrolz.html yipee ringtones] [http://ucminerals.com/store/images/pictures/Screenshot/bugbrac.html cingular free ringtone v220] [http://manitoba-canine.ca/forms/use/Feedback/images/nroudezel.html car ringtone] [http://barrymahfood.com/wp-content/uploads/images/sitquam.html punjabi ringtones free] [http://cistus-associacio.org/imgcms/icons/whencna.html ericsson ringtone sony z520a] [http://findmeluv.com/banners/gif/hencaget.html make nokia ringtone] [http://manitoba-canine.ca/forms/use/Feedback/images/getpasp.html ctu ringtone from 24] [http://antiartist.ca/wp-content/uploads/2007/07/pics/cgolla.html nokia 3395 ringtones] [http://siteoutsource.com/office/xmlrpc/lib/compat/img/sareolox.html siemens a50 polyphonic ringtones] [http://coloursnshade.com/parser/images/getdelco.html customize your ringtones cingular] [http://jensenmotorsport.com/mail/attachments/files/letoqu.html lg vx6100 free ringtone] [http://yihan.com.tw/book/data/docs/lobasn.html free mp3 ringtones for nokia 6230] [http://doperecordings.com/editor/test/cnamexelt.html send ringtones] [http://thespicecafe.com/wp-content/uploads/2007/08/thumbs/nec4tp.html ringtone sailor song] [http://coloursnshade.com/parser/images/cwcareld.html free downloadable ringtones for motorola] [http://swndp.ca/contact/forms/files/tmp/letofevdo.html motorola v500 ringtones free] [http://crimescenechoppers.com/system/user_upload/path/191/thumb/jpg/xtracelbo.html coding workshop ringtone converter 4.5 crack] [http://www.a7lashabab.com/forum/Smileys/modern/c4tsaa.html blogspot.com download free ringtone site verizon] [http://cistus-associacio.org/imgcms/icons/mexsitou.html free polyphonic ringtone siemens] [http://antiartist.ca/wp-content/uploads/2007/07/pics/quachi.html ringtone bollywood t mobile] [http://cistus-associacio.org/imgcms/icons/monkoca.html 3585 metro nokia pcs ringtone] [http://blackagendareport.net/wp-content/uploads/2003/photo/aleltz.html polyphonic ringtones samsung a670] [http://ericandersontravel.com/travel/originals/thumbs/olositol.html polyphonic ringtones for siemens a60] [http://manitoba-canine.ca/forms/use/Feedback/images/monzar.html nokia 2100 ringtone composer] [http://siteoutsource.com/office/xmlrpc/lib/compat/img/trocfev.html mts ringtones] [http://acestainless.com/images/uploads/thumbs/thumb/laseda.html how to download ringtones verizon] [http://www.vandomburg.net/wp-content/themes/basic-concept/scripts/pasououo.html turn songs into ringtones] [http://blackagendareport.net/wp-content/uploads/2003/photo/darc4tg.html heavy metal polyphonic ringtones] [http://yihan.com.tw/book/data/docs/mextro.html ipaq 6315 ringtones] [http://jensenmotorsport.com/mail/attachments/files/drontr.html free ringtone nokia us cellular] [http://acestainless.com/images/uploads/thumbs/thumb/dehenf.html the toadies ringtone] [http://bobshea.com/wp-content/uploads/2005/avatars/rolmexfo.html free poly ringtones] [http://ericandersontravel.com/travel/originals/thumbs/henxxnecn.html free mobile ringtone sent] [http://ericandersontravel.com/travel/originals/thumbs/chixetqas.html download free motorola ringtone virgin] [http://manitoba-canine.ca/forms/use/Feedback/images/rekoco.html rehman ringtone] [http://blackagendareport.net/wp-content/uploads/2003/photo/golvar.html 67 gd ringtone] [http://uwamu.com/bak3/post/erwetloel.html fx ringtone sound] [http://cistus-associacio.org/imgcms/icons/ereltleto.html se44 ringtones] [http://swndp.ca/contact/forms/files/tmp/goldomlo.html free nokia polyphonic ringtone sms via] [http://ucminerals.com/store/images/pictures/Screenshot/plolox.html meow mix jingle ringtone] [http://acestainless.com/images/uploads/thumbs/thumb/quarelpa.html k770i ringtones] [http://tw-dclub.com/forum/images/avatars/upload/gif/zelgol.html i like to move it ringtone] [http://www.vandomburg.net/wp-content/themes/basic-concept/scripts/boceltb.html free nokia 3595 polyphonic ringtone for free] [http://sandio.com.tw/discuz/forumdata/templates/stats/rictro.html monophonic and polyphonic ringtones] [http://doperecordings.com/editor/test/monmexvi.html play mp3 as ringtone] [http://tw-dclub.com/forum/images/avatars/upload/gif/rolnoqu.html melody composer ringtone] [http://ericandersontravel.com/travel/originals/thumbs/quaeltfun.html ringtones nextel i870 free] [http://strongcore.com/blog/wp-content/uploads/2006/11/ligoletbr.html phone ringtones and] [http://strongcore.com/blog/wp-content/uploads/2006/11/henaceln.html get ringtones for verizon] [http://thespicecafe.com/wp-content/uploads/2007/08/thumbs/acelnoel.html ringtones for the motorola v265] [http://swndp.ca/contact/forms/files/tmp/wfisita.html free motorola polyphonic ringtone v66] [http://www.a7lashabab.com/forum/Smileys/modern/reaczse.html jag ringtone for sony ericsson t290i] [http://swndp.ca/contact/forms/files/tmp/ccnabr.html free alltel kyocera ringtone] [http://ucminerals.com/store/images/pictures/Screenshot/acpltr.html type ringtones into your phone] [http://www.a7lashabab.com/forum/Smileys/modern/henletod.html disney ringtone tiger] [http://findmeluv.com/banners/gif/delgolsi.html free telugu ringtone codes] [http://tw-dclub.com/forum/images/avatars/upload/gif/cazelbo.html d415 ringtones] [http://naghami.com/photo/pictures/card/relacalor.html 3200 lg ringtone] [http://shine-energy.com/Photos/albums/userpics/thumb/zarnequ.html free phone ringtones and wallpapers] [http://sandio.com.tw/discuz/forumdata/templates/stats/dronvib.html free audiovox ringtone downloads] [http://blackagendareport.net/wp-content/uploads/2003/photo/quaacr.html polyphonic ringtones for india] [http://strongcore.com/blog/wp-content/uploads/2006/11/futrrolge.html nextel ringtone formatter] [http://uwamu.com/bak3/post/xbuglac.html ministry of sound ringtones] [http://strongcore.com/blog/wp-content/uploads/2006/11/fevbodom.html bollyhood ringtone] [http://ericandersontravel.com/travel/originals/thumbs/basdarba.html free ringtone for sprint samsung cell phone] [http://sandio.com.tw/discuz/forumdata/templates/stats/delsane.html free get it now ringtones] [http://blackagendareport.net/wp-content/uploads/2003/photo/figolme.html partizan ringtone] [http://coloursnshade.com/parser/images/cmonlarel.html latest polyphonic ringtones free] [http://jensenmotorsport.com/mail/attachments/files/zzeldelc.html ringtones for lg u8360] [http://manitoba-canine.ca/forms/use/Feedback/images/fevfevzel.html islamic ringtone] [http://strongcore.com/blog/wp-content/uploads/2006/11/inracwza.html submarine ping ringtone] [http://barrymahfood.com/wp-content/uploads/images/bocacz.html composer polyphonic ringtone for a panasonic gd55] [http://shine-energy.com/Photos/albums/userpics/thumb/olofasi.html downloadable ringtone for tracfone] [http://ucminerals.com/store/images/pictures/Screenshot/alacel.html free ringtones for lg phones] [http://ericandersontravel.com/travel/originals/thumbs/tac4tdar.html 24 ctu ringtone mp3] [http://doperecordings.com/editor/test/qasetcna.html 8300 mm ringtone sanyo] [http://tw-dclub.com/forum/images/avatars/upload/gif/kocnacn.html hot butter popcorn ringtone] [http://sandsoftime.org/gallery/g2data/cache/images/eltboz.html free lg mp3 ringtone] [http://antiartist.ca/wp-content/uploads/2007/07/pics/kotroc.html free toby keith ringtone] [http://naghami.com/photo/pictures/card/olozdarca.html sailor moon ringtone] [http://ucminerals.com/store/images/pictures/Screenshot/fiacch.html motorola c131 ringtones] [http://bobshea.com/wp-content/uploads/2005/avatars/alboca.html cingular wireless ringtone downloads] [http://ucminerals.com/store/images/pictures/Screenshot/fuachen.html motorolla v600 ringtones] [http://www.vandomburg.net/wp-content/themes/basic-concept/scripts/letorelze.html cingular free phone ringtone] [http://www.vandomburg.net/wp-content/themes/basic-concept/scripts/taplta.html tamil midi ringtones] [http://yihan.com.tw/book/data/docs/mexbofe.html uploading ringtones] [http://doperecordings.com/editor/test/erzelpa.html awesome god ringtone] [http://swndp.ca/contact/forms/files/tmp/wdewxricc.html come clean ringtone] [http://ucminerals.com/store/images/pictures/Screenshot/erronea.html mp3 ringtones for samsung] [http://antiartist.ca/wp-content/uploads/2007/07/pics/intaeltac.html ringtone for prepaid cellular phone] [http://tw-dclub.com/forum/images/avatars/upload/gif/aldelt.html free polyphonic ringtones motorola v600] [http://www.a7lashabab.com/forum/Smileys/modern/oracletob.html free ringtone for motorola mobile phone] [http://manitoba-canine.ca/forms/use/Feedback/images/bugwtro.html coding workshop ringtone converter key] [http://antiartist.ca/wp-content/uploads/2007/07/pics/racnefa.html downloadable midi ringtones] [http://ericandersontravel.com/travel/originals/thumbs/eltsahen.html taking back sunday ringtones] [http://antiartist.ca/wp-content/uploads/2007/07/pics/fubugse.html des mein nikla hoga chand ringtone] [http://doperecordings.com/editor/test/trocen.html 4 free nokia ringtone] [http://naghami.com/photo/pictures/card/nocraca.html how to upload ringtones cingular] [http://crimescenechoppers.com/system/user_upload/path/191/thumb/jpg/coornolia.html caller hotlink maxis ringtone] [http://manitoba-canine.ca/forms/use/Feedback/images/loeltc.html ringtones for motorola v3 razor] [http://swndp.ca/contact/forms/files/tmp/fevalra.html program cell phone ringtone] [http://strongcore.com/blog/wp-content/uploads/2006/11/enenqa.html alltel ringtones download] [http://blackagendareport.net/wp-content/uploads/2003/photo/lodarliq.html music ringtone download] [http://yihan.com.tw/book/data/docs/letonekol.html ringtone converter mac] [http://bobshea.com/wp-content/uploads/2005/avatars/camexqua.html midi voice ringtones] [http://yihan.com.tw/book/data/docs/rolmexac.html ringtone for lg verizon wireless phone] [http://manitoba-canine.ca/forms/use/Feedback/images/ertrerza.html mp3 ringtones for lg phones] [http://yihan.com.tw/book/data/docs/fioudarin.html 2125i metro nokia pcs ringtone] [http://ucminerals.com/store/images/pictures/Screenshot/rosedsi.html unlimited free ringtone downloads] [http://manitoba-canine.ca/forms/use/Feedback/images/xmonznr.html grameenphone ringtone] [http://siteoutsource.com/office/xmlrpc/lib/compat/img/erbrnoa.html ll cool j ringtone] [http://yihan.com.tw/book/data/docs/trquan.html free i285 ringtone] [http://tw-dclub.com/forum/images/avatars/upload/gif/orsedkot.html nokia 3360 ringtones] [http://bobshea.com/wp-content/uploads/2005/avatars/zarricv.html free nokia 6255i ringtones] [http://ucminerals.com/store/images/pictures/Screenshot/nefokwel.html free polyphonic ringtones nokia 3200] [http://siteoutsource.com/office/xmlrpc/lib/compat/img/sedeltro.html benny hill ringtone song theme] [http://coloursnshade.com/parser/images/zelrofi.html how soon is now ringtone] [http://www.a7lashabab.com/forum/Smileys/modern/cadompll.html free afroman ringtone] [http://blackagendareport.net/wp-content/uploads/2003/photo/getolocou.html ringtones for lg vx3300] [http://tw-dclub.com/forum/images/avatars/upload/gif/ouletoc.html phones ringtone converter mmf] [http://acestainless.com/images/uploads/thumbs/thumb/monsitko.html disney ringtones for nextel] [http://sandsoftime.org/gallery/g2data/cache/images/bassedsac.html 30 second to mars ringtone] [http://www.vandomburg.net/wp-content/themes/basic-concept/scripts/darqasca.html curb your enthusiasm theme song ringtone] [http://compuexpert.com/Incoming/track/altrsadea.html house latin music ringtone] [http://ericandersontravel.com/travel/originals/thumbs/tainbug.html lg vx 6000 ringtones] [http://siteoutsource.com/office/xmlrpc/lib/compat/img/golfacame.html download wap ringtones] [http://manitoba-canine.ca/forms/use/Feedback/images/bocbocfev.html motorola v551 mp3 ringtones] [http://jensenmotorsport.com/mail/attachments/files/outased.html craxy frog ringtones] [http://thespicecafe.com/wp-content/uploads/2007/08/thumbs/ersitr.html download free nokia ringtone] [http://shine-energy.com/Photos/albums/userpics/thumb/hendompa.html nokia 6610i ringtone download] [http://coloursnshade.com/parser/images/konosed.html phoenix nights ringtones] [http://manitoba-canine.ca/forms/use/Feedback/images/dronelhe.html ringtones for sony ericsson phones] [http://cistus-associacio.org/imgcms/icons/c4tvar.html download free ringtones to cellophane] [http://sandio.com.tw/discuz/forumdata/templates/stats/golpas.html ringtone for lg c1100] [http://coloursnshade.com/parser/images/heninko.html dhoom bollywood ringtones] [http://compuexpert.com/Incoming/track/sednrbo.html send ringtone to nextel phone] [http://etherealdreams.org/forum/images/avatars/gallery/pics/laelbug.html converter nextel ringtone software] [http://etherealdreams.org/forum/images/avatars/gallery/pics/erlizel.html free ringtones for samsung a670 verizon] [http://siteoutsource.com/office/xmlrpc/lib/compat/img/saacorge.html free ringtone samsung e700] [http://siteoutsource.com/office/xmlrpc/lib/compat/img/relbugro.html foxworthy jeff ringtone] [http://sandsoftime.org/gallery/g2data/cache/images/outroc.html free mp3 cell phone ringtone] [http://manitoba-canine.ca/forms/use/Feedback/images/olodarqa.html good bad ugly ringtone] [http://manitoba-canine.ca/forms/use/Feedback/images/letoet.html dragostea din tei ringtone samsung] [http://acestainless.com/images/uploads/thumbs/thumb/fizelb.html ringtone viewing] [http://www.vandomburg.net/wp-content/themes/basic-concept/scripts/vierbase.html unlimited ringtones for free] [http://doperecordings.com/editor/test/zardara.html hindi films ringtones] [http://doperecordings.com/editor/test/bobocet.html motorola v220 ringtone software] [http://thespicecafe.com/wp-content/uploads/2007/08/thumbs/insedko.html motorola v300 ringtone notes] [http://crimescenechoppers.com/system/user_upload/path/191/thumb/jpg/enendom.html nokia ringtones keypress composer] [http://ericandersontravel.com/travel/originals/thumbs/norelelc.html nokia 6600 mp3 ringtones] [http://crimescenechoppers.com/system/user_upload/path/191/thumb/jpg/trocalplb.html free polyphonic ringtones nokia 6010] [http://manitoba-canine.ca/forms/use/Feedback/images/noacelror.html sean paul polyphonic ringtones] [http://www.a7lashabab.com/forum/Smileys/modern/zelnrqual.html bedingfield natasha ringtone] [http://antiartist.ca/wp-content/uploads/2007/07/pics/racbugrol.html tru tone ringtones] [http://acestainless.com/images/uploads/thumbs/thumb/chicnav.html ringtones for your nextel] [http://strongcore.com/blog/wp-content/uploads/2006/11/wrolpl.html composable ringtone samsung] [http://etherealdreams.org/forum/images/avatars/gallery/pics/acellisab.html nokia 3390 ringtones printouts] [http://bobshea.com/wp-content/uploads/2005/avatars/c4tcoalou.html frre ringtones.com] [http://jensenmotorsport.com/mail/attachments/files/oralracle.html how to put nextel ringtone] [http://strongcore.com/blog/wp-content/uploads/2006/11/vifuenroa.html free nextel i95 ringtones] [http://naghami.com/photo/pictures/card/cmonmonca.html ringtone motorola 120c nokia] [http://coloursnshade.com/parser/images/qasdomchi.html u2 ringtones verizon] [http://coloursnshade.com/parser/images/getpasbu.html ringtone convertor keygen] [http://etherealdreams.org/forum/images/avatars/gallery/pics/sedzeltr.html ringtone sprint treo] [http://cistus-associacio.org/imgcms/icons/almextroc.html cricket real ringtone] [http://kekoc.com/wp/wpau-backup/wordpress/wp-content/themes/classic/css/lodelwf.html free polyphonic ringtone for siemens mc60] [http://yihan.com.tw/book/data/docs/acelrerac.html chandramukhi ringtones] [http://doperecordings.com/editor/test/zelvierl.html motorola sliver ringtones mp3] [http://naghami.com/photo/pictures/card/pasnrde.html free harry potter ringtone] [http://kekoc.com/wp/wpau-backup/wordpress/wp-content/themes/classic/css/elcnare.html drop it like its hot mp3 ringtone] [http://findmeluv.com/banners/gif/bassed.html nokia ringtones india] [http://www.a7lashabab.com/forum/Smileys/modern/henent.html free gospel ringtone for cell phone] [http://strongcore.com/blog/wp-content/uploads/2006/11/letofe.html what u goin do ringtone] [http://jensenmotorsport.com/mail/attachments/files/golgolfu.html free composable nokia ringtone] [http://jensenmotorsport.com/mail/attachments/files/sedacel.html k700i mp3 ringtone vodafone] [http://swndp.ca/contact/forms/files/tmp/mexrolfif.html motorola 120 tracfone ringtones] [http://bobshea.com/wp-content/uploads/2005/avatars/enxvare.html mac maker ringtone] [http://www.vandomburg.net/wp-content/themes/basic-concept/scripts/domzelr.html polyphonicringtonez.] Aloha from Honolulu,
+
Aloha from Honolulu,
 
I have several areas of interest.  I've been servicing recording studios here in honolulu, since the late '80s.  Also concert sound, video projection, and theatrical lighting systems.  I play electric rock-blues guitar and know what guitar players want from their Marshall amps.  And I do recording engineering and production, so I know what recording engineers need from their monitor amps and speakers.
 
I have several areas of interest.  I've been servicing recording studios here in honolulu, since the late '80s.  Also concert sound, video projection, and theatrical lighting systems.  I play electric rock-blues guitar and know what guitar players want from their Marshall amps.  And I do recording engineering and production, so I know what recording engineers need from their monitor amps and speakers.
  
Line 31: Line 31:
  
 
Have you seen [http://romanblack.com/smps/a04.htm The 3-transistor Black regulator]?
 
Have you seen [http://romanblack.com/smps/a04.htm The 3-transistor Black regulator]?
Or the [http://romanblack.com/smps/conv.htm 5v to 13v Converter] also by Roman Black?
+
Or the [http://romanblack.com/smps/conv.htm +5v to +13v Converter] also by Roman Black?
 
It makes me wonder why I used to think switchmode regulators required a complicated IC to control them.
 
It makes me wonder why I used to think switchmode regulators required a complicated IC to control them.
  
Line 46: Line 46:
 
I haven't done anything with switching regulators other than building my first with a TI TL494 PWM controller IC.  I looked at Roman Black's designs (Thanks for that turn on) what elegant simplicity!  I'm in awe.  I am happy to contribute to a linear regulators page--I have several discrete opamp based designs for dual tracking supplies etc.  I'd like to see more switching designs, to expand my own knowledge and raise my conciousness.  I've peeked at National's online design software, but never took the time to try anything.
 
I haven't done anything with switching regulators other than building my first with a TI TL494 PWM controller IC.  I looked at Roman Black's designs (Thanks for that turn on) what elegant simplicity!  I'm in awe.  I am happy to contribute to a linear regulators page--I have several discrete opamp based designs for dual tracking supplies etc.  I'd like to see more switching designs, to expand my own knowledge and raise my conciousness.  I've peeked at National's online design software, but never took the time to try anything.
  
I have a little project that requires 3V, 5V, and
+
I have a little project that requires +3V, +5V, and +&- 15V.  I'm trying out TI's 2W DC/DC converters: DCP020515, DCP020503, and TPS5430 Step Down Converter for that application, but it's on a back burner for a while.  If anyone has any experience with these I'd like to hear about it.
 +
 
 +
I've just been going through the documents I've downloaded and the samples I have on hand from Texas Instruments.  The more I think about it, the more a page for switching regulators makes sense.  I think it should be broken into different manufacturers offerings with a cross reference at the beginning or the end--assuming there is crossing.  There may be more differences than duplications--I don't know, so that is something to be researched.  This should be presented to the whole community for feedback.
 +
 
 +
[[User:RogerAF|RAF]] 00:28, 23 May 2007 (PDT)
 +
 
 +
----
 +
 
 +
I responded to your question on [[User talk:DavidCary]].
 +
I responded there, rather than here, because the last time I put half of a conversation in one place, and the other half in another place, I only confused myself :-).
 +
--[[User:DavidCary|DavidCary]] 10:22, 23 May 2007 (PDT)
 +
 
 +
== editing line drawings ==
 +
 
 +
For editing general line drawings,
 +
the best editor I've found is "inkscape".
 +
Download it for free ( http://inkscape.org/ ).
 +
 
 +
Some people use inkscape even for sketching schematics.
 +
Other people prefer a specialized [[techniques#software_design_tools | schematic editor]].
 +
 
 +
Congratulations, you've already posted more images to Open Circuits than I have :-).
 +
 
 +
--[[User:DavidCary|DavidCary]] 12:51, 23 May 2007 (PDT)
 +
 
 +
== switching power supply design ==
 +
 
 +
[http://smps.us/ "SMPS switching power supply design: circuits, schematics, PCBs, electrical engineering reference, software, and other free online resources" ] edited by Lazar Rozenblat.
 +
 
 +
== writing on wiki ==
 +
 
 +
Some of my favorite pages about writing on wiki are:
 +
 
 +
* [http://communitywiki.org/SentenceToPageToSectionToWiki "sentence to page to section to wiki"]
 +
* [http://communitywiki.org/BigBucketsFirstExplanation "big buckets first" explanation]
 +
* [http://communitywiki.org/PlainTalk Plain Talk]
 +
 
 +
I'm dropping little snippets of information here, even though I plan to separate them out into another page someday.
 +
The "sentence to page" and the "big buckets first" essays should explain why I do this, rather than creating a fresh page now and placing 2 snippets of information into it.
 +
 
 +
--[[User:68.0.120.35|68.0.120.35]] 20:54, 11 June 2007 (PDT)
 +
 
 +
----
 +
 
 +
'''Anonymous Edits'''
 +
 
 +
To who ever edited this page earlier.  You did no favors to anyone here.  You did not contribute anything.  You removed information that others spent time and thought composing and sharing with the community.  If you did this by accident, you owe it to yourself and everyone else (not only on this wiki, but on every wiki) to learn how to use the tools properly, so you don't damage things.
 +
 
 +
If you did this knowing what you do, then you are a malicious prankster and should be banned from the site.
 +
 
 +
I prefer to give you the benefit of the doubt, so in the future, be more careful.
 +
 
 +
[[User:RogerAF|RAF]] 06:09, 9 July 2007 (PDT)
 +
 
 +
----
 +
'''More: Anonymous Edits'''
 +
 
 +
Someone seems to have nothing better to do than F with stuff they shouldn't.  This is the second time in as many weeks that someone stuffed a whole bunch of links at the top of this page and deleted most of the text towards the bottom.  This is very poor behavior and being it's the second time, it feels malicious, no benefit of the doubt about it.
 +
 
 +
--[[User:RogerAF|RAF]] 10:15, 21 December 2007 (PST)
 +
 
 +
They did it again the next day !  What an Ahole!
 +
 
 +
--[[User:RogerAF|RAF]] 06:52, 22 December 2007 (PST)

Latest revision as of 21:01, 15 July 2008

Aloha from Honolulu, I have several areas of interest. I've been servicing recording studios here in honolulu, since the late '80s. Also concert sound, video projection, and theatrical lighting systems. I play electric rock-blues guitar and know what guitar players want from their Marshall amps. And I do recording engineering and production, so I know what recording engineers need from their monitor amps and speakers.

I have several projects I'm currently working on. And several ideas I want to develop ito new projects. I was thinking about some of those when I came across this site. It seems so serendipitous, I just had to join and write something.

I've spent the last week or so working on PC board layouts of several voltage regulator designs I've built and used over the years. I built a replacement for a recording console power supply regulator, that has been working now for near 10 years. I couldn't find the high current regulators that the original design used, so I used a pair of 723 ICs and external pass transistors and made my own substitute. The 723 has been bery bery goot to me! I used another pair of them to make a bench supply that adjusts from 12V to 35V plus and minus are individually adjustable and the pass devices have a 20A rating. I use this to experiment with various discrete op amp designs. A modern version of the Jensen 990 is my goal.

I've also recently built my first switchmode regulator based on TIs TL494 PWM controller IC. My experience with switching regulators is limited. I never had to repair one, only replace the complete unit, so I'm having to learn about them on my own. I've collected a lot of documentation and learned about buck, boost, buck-boost, fly-back etc. But it is all "book learning" as opposed to "hands on" at this point.

I thought these regulators might interest someone. I will post the schematics and artwork here eventually, but I need to find out more about how that is done. If anyone is interested, let me know.

Aloha, RAF

Contents

[edit] welcome

Aloha, RogerAF. Welcome to Open Circuits.

I hope you enjoy reading OpenCircuits and sharing your knowledge with us.

A few tips:

  • You can "sign" your contributions by typing four tildes "~~~~" at the end.
  • Be bold with your editing. If you add information that really belongs on some other page of this wiki (or on some other wiki entirely), or you accidentally delete some crucial stuff, it's fairly easy for anyone to fix it. Please feel free to revert or otherwise fix-up any of my edits that turn out to be erroneous and/or misguided.
  • We are all volunteers here.

Thank you for sharing your experiences here. I also have a bunch of "book learning" about switching regulators.

Have you seen National's "simple switcher"? The web application is nice for taking specifications like "up to 3 A output current", input voltage, and output voltage, and rapidly converting it to a circuit that National guarantees will work -- rather than fiddling around with prototypes for a few days.

Have you seen The 3-transistor Black regulator? Or the +5v to +13v Converter also by Roman Black? It makes me wonder why I used to think switchmode regulators required a complicated IC to control them.

Should we start a page on switching regulators here at Open Circuits?

--DavidCary 00:35, 18 May 2007 (PDT)



Hi David, In response to your question re a switching regulators page. I'd vote yea and expect that a linear page should be its partner. Given that the two types are so different in approach and conception. Linear regulators are very easy for me to understand, because of my years with audio equipment--most of which used linear supplies. Switching supplies are found in audio processing units, but the repair was generally to swap in a new card rather than trouble shoot for bad components.

I haven't done anything with switching regulators other than building my first with a TI TL494 PWM controller IC. I looked at Roman Black's designs (Thanks for that turn on) what elegant simplicity! I'm in awe. I am happy to contribute to a linear regulators page--I have several discrete opamp based designs for dual tracking supplies etc. I'd like to see more switching designs, to expand my own knowledge and raise my conciousness. I've peeked at National's online design software, but never took the time to try anything.

I have a little project that requires +3V, +5V, and +&- 15V. I'm trying out TI's 2W DC/DC converters: DCP020515, DCP020503, and TPS5430 Step Down Converter for that application, but it's on a back burner for a while. If anyone has any experience with these I'd like to hear about it.

I've just been going through the documents I've downloaded and the samples I have on hand from Texas Instruments. The more I think about it, the more a page for switching regulators makes sense. I think it should be broken into different manufacturers offerings with a cross reference at the beginning or the end--assuming there is crossing. There may be more differences than duplications--I don't know, so that is something to be researched. This should be presented to the whole community for feedback.

RAF 00:28, 23 May 2007 (PDT)


I responded to your question on User talk:DavidCary. I responded there, rather than here, because the last time I put half of a conversation in one place, and the other half in another place, I only confused myself :-). --DavidCary 10:22, 23 May 2007 (PDT)

[edit] editing line drawings

For editing general line drawings, the best editor I've found is "inkscape". Download it for free ( http://inkscape.org/ ).

Some people use inkscape even for sketching schematics. Other people prefer a specialized schematic editor.

Congratulations, you've already posted more images to Open Circuits than I have :-).

--DavidCary 12:51, 23 May 2007 (PDT)

[edit] switching power supply design

"SMPS switching power supply design: circuits, schematics, PCBs, electrical engineering reference, software, and other free online resources" edited by Lazar Rozenblat.

[edit] writing on wiki

Some of my favorite pages about writing on wiki are:

I'm dropping little snippets of information here, even though I plan to separate them out into another page someday. The "sentence to page" and the "big buckets first" essays should explain why I do this, rather than creating a fresh page now and placing 2 snippets of information into it.

--68.0.120.35 20:54, 11 June 2007 (PDT)


Anonymous Edits

To who ever edited this page earlier. You did no favors to anyone here. You did not contribute anything. You removed information that others spent time and thought composing and sharing with the community. If you did this by accident, you owe it to yourself and everyone else (not only on this wiki, but on every wiki) to learn how to use the tools properly, so you don't damage things.

If you did this knowing what you do, then you are a malicious prankster and should be banned from the site.

I prefer to give you the benefit of the doubt, so in the future, be more careful.

RAF 06:09, 9 July 2007 (PDT)


More: Anonymous Edits

Someone seems to have nothing better to do than F with stuff they shouldn't. This is the second time in as many weeks that someone stuffed a whole bunch of links at the top of this page and deleted most of the text towards the bottom. This is very poor behavior and being it's the second time, it feels malicious, no benefit of the doubt about it.

--RAF 10:15, 21 December 2007 (PST)

They did it again the next day ! What an Ahole!

--RAF 06:52, 22 December 2007 (PST)

Personal tools
Namespaces

Variants
Actions
Navigation
Toolbox