User talk:RogerAF

From OpenCircuits
Revision as of 09:14, 28 October 2007 by 216.56.61.90 (talk)
Jump to navigation Jump to search

motorola hs850 prince buster key sat seca dragonsta azioni italia motorola hs810 i killer recupero backup dati site the best of rod stewart con radio mp3 lg lettori ordet - la parola prestito trapani myair can t get enough terratec cinergy 1400 dvb t rotic.info www scavolini com coop holmail nepeta cataria i cowboys del deserto goldminer online code tps canal sat pizza napoletana rotic.info eyed hallowen processori p4 820 preciza generi comunicativi giardino delle ninfe argento orecchini united soccer anche in italia mini dvd jeep cherokee 2004 nytromobile.info video porno gratis de michelle vieth sxc luana la vergine sacra ragazzo cantu mimo dani dvd tx musiche per matrimonio www blinblineo net com masterizzatore dual interno notebook tgcom olimpiadi lesbiche pelose configurare adsl soldaduras sony mdr v-300 il prigioniero del re praktica luxmedia 5008 packard bell lettore mp3 radio policlinico gemelli hobby creativi url el perreo bust a mov sigla passaparola organi power shot canon uova in camicia donne nere xxx nvidia nx6600 babay h tariffe enel dragon bal nulla sul serio fainal fantasy ytunnelpro v1 3 build 272 free studentesse salerno laghetto arredo giardino hally barry viaggi epifania eddi dee don homar tara reid eve queen mouse bluetooth ottico camere un dolce addio lavoro strasbourg cecchetto gioca jouer finepix s2 pro fujifilm ragazzo siviglia on your knees warioland 4 roper bluetooth nandina robert cummings quicksand accusato di omicidio noli pavillon pereire arc de triomphe nifty japan nuova psp pensiero stupendo ligos codec download definizione adolescente narcisista Hotel urbino servi futbol juegos caviar wd3200sd odense lbc wcam 300a nfh crociera gay manhunt cokie car charger geni peternorth prencis call on me hp psc 6215 www sexparty otm srl mess i numer raz venus con hbh 35 fax hp 5510 phd los morancos nx6110 py500et dmc lz1 mii spa video sci snowboard ingmar bergman dhany ismene.info big boy jonnhy deep p9 sony eva pocker puma future cat gt boy sex gial bermuda hotel wall plugged tan da cuple dx 3255 zippho amilo m3438g 1 86 firewall server vpn elchat con remix mh 18 vogue sposa plasma 42px11 sab autoservizi coppie belluno torgnon lcd acer 32 fuji a340 finepix ganni dany crack vhdl cd cover pro mp3 512 mb sacar rey misteryo www cne gov kiss me sunlight limao subwoofer 200w emac g4 mobic 15 30 cpr 15 mg lts a go corpsegrinder gros ventres yh 925 lamar dairi cmi8330 dormi schlanders the reason kim amd 4400 toledo www laposte fr csuivi fat man dannii voralpen this loce meduno gymnite.info philips dect 111 finepix s2 pro fujifilm bootsy rubber rover upadance nx9105 sempron badmington magix cd mahjong shangai boogie oral b 7500 kill bill2 zelda wind waker bloming garden derided.info jo coker blocker sky hex files 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

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

Retrieved from "http://www.opencircuits.com/index.php?title=User_talk:RogerAF&oldid=10239"