_[sdiy]_+-12V_supply

[Oren Leavitt]

I've used 78xx/79xx for years and never had a problem with them.

I'll admit, though, there is some fun in DIY'ing a nice bench power 
supply...

This fellow designed a very nice discrete transistor bench supply:
http://members.ispwest.com/edgrochowski/powersupply.htm

His accomplishments make me feel *very* small - small enough to trip 
over a tin whisker...

Oren

James Patchell wrote:
> Making blanket statements about parts sucking always cracks me up.  
> Since the 78xx/79xx regulators are the biggest selling regulators, that 
> either means everybody is stupid, or the parts must have true value.  I 
> have run into a few engineers who felt the same way.  After fixing their 
> mistakes, the parts have always worked flawlessly.  There are 
> applications where they will not work.  I think I have only encountered 
> one of those in 30 years....
> 
> At 07:02 AM 1/14/2005 -0700, Scott Gravenhorst wrote:
> 
>> =?iso-8859-2?Q?Roman?= <modular at go2.pl> wrote:
>> >if putting 723 instead of 7812 is an overkill, how would you call
>> >someone who made 1.5A power supply using regular opamps,
>> >darlington transistors, lots of other components, and 10ppm/K
>> >reference IC, where LM317/337 would be more than enough?
>> >
>> >You're right, a crazy maniac.
>> >But I just wanted it so bad.
>> >
>> >BTW, IMHO 78xx and 79xx suck
>> >
>> >Roman
>>
>> Hmm.  Well, everyone is entitled to an opinion, I use 78xx and 79xx
>> and I don't have problems with them.  I just don't hear the noise
>> that they're supposed to make.  Not only do I use these nasty 3
>> terminal regulators, I use them with AC wallwarts and halfwave
>> rectifiers.
>>
>> >
>> >---- Wiadomo¶æ Oryginalna ----
>> >Od: "Roy J. Tellason" <rtellason at blazenet.net>
>> >Do: synth <synth-diy at dropmix.xs4all.nl>
>> >Data: Thu, 13 Jan 2005 20:50:36 -0500
>> >Temat: Re: [sdiy] +-12V supply
>> >
>> >> On Thursday 13 January 2005 06:55 pm, Chris CROSSKEY wrote:
>> >> >  Toss out the 7812/7912 and use a 723 on each side with a big bypass
>> >> > transistor.....
>> >>
>> >> Why,  if the simpler setup will do what you need?  Did I miss 
>> something there
>> >> that indicated a massive current draw requirement or something?
>> >>
>> >
>> >
>>
>> ---------------------------------------------------------
>> - Where merit is not rewarded, excellence fades.
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>>
>> -- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
>> -- Linux Rex         | RedWebMail by RedStarWare
>> -- FatMan: home1.gte.net/res0658s/fatman/
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>> -- Autodidactic Master of Arcane and Hidden Knowledge.
> 
> 
>         -Jim
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> http://www.oldcrows.net/~patchell
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