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PICList Thread
'Need DIY Power Supply Kit or cheap bench supply'
1998\12\14@123354 by beking

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I would like an inexpensive bench supply that provides fixed +/-5v, +/-12v
and variable +/- 0-15v.  I also would like current limiting on all sections.
I am sure 1-2A max will be more than adequate.

The PS will be used to power PIC breadboard projects.

My preference is to build one from scratch using known-good plans or a kit
primarily to keep the cost as cheap as possible.  I would consider pre-built
but I have yet to see an economical PS with the features I desire.  I am not
up to designing one which is why I am looking for an off-the-shelf type of
solution.  A quick search of the net found a few near possibilities but they
would require modifications which I really would prefer not to spend time
on.

Ideas?


Thanks,

Barry

1998\12\14@171035 by Scott Shidel...

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face
On Mon, 14 Dec 1998, Barry E. King wrote:

> I would like an inexpensive bench supply that provides fixed +/-5v, +/-12v
> and variable +/- 0-15v.  I also would like current limiting on all sections.
> I am sure 1-2A max will be more than adequate.

Have you considered a simple setup using the 7805, and 7812 ICs?  its
really not that difficult.
Radio Schmuck also has a book there for building power supplies, with alot
of projects.  I know you said you dont want to design it yourself, but its
really simple compared to most pic projects.

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Scott
-71 Pinto, stock 2.3 turbo, 13.67@98, radials
       8.1@85 1/8th mile on slicks
-85 Merkur 13.764@98 on radials&3300lbs! Under $300 in mods!
------------------------------------------------------------------------

1998\12\14@175043 by beking

picon face
Yes I have and you are right, they are rather simple.  My original intent
was to have something I didn't even need to think about but in retrospect
even the amount of time spent typing these messages would have built one by
now  ;)

I saw that RS book when looking for something else but didn't take the time
to browse through.


Regards,

Barry


> {Original Message removed}

1998\12\14@190937 by Scott Shidel...

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On Mon, 14 Dec 1998, Barry E. King wrote:

> Yes I have and you are right, they are rather simple.  My original intent
> was to have something I didn't even need to think about but in retrospect
> even the amount of time spent typing these messages would have built one by
> now  ;)
>
> I saw that RS book when looking for something else but didn't take the time
> to browse through.
>
I have the book.
I can look thru it tonite and see if there are any projects in there that
suit your needs.  If so, I can scan them and send them to you this
evening. Its the least I can do for the help I have gotten so far on this
list.
Let me know, its really no big deal.

-----------------------------------------------------------------------
               The Pinto Page:  http://www.eng.usf.edu/~shidel
                  Join the Ford Turbo Mailing List!
                 http://www.FindMail.com/list/turbo/
Scott
-71 Pinto, stock 2.3 turbo, 13.67@98, radials
       8.1@85 1/8th mile on slicks
-85 Merkur 13.764@98 on radials&3300lbs! Under $300 in mods!
------------------------------------------------------------------------

1998\12\14@204029 by Eric Borcherding

picon face
Barry,

I have found that downloading the PDF file from national semi concerning
these 78XXX parts have lots of application notes.    The LM150 and LM317
PDF files aree also nice as they have references to variable designs.
These PDF files have schematics and can be based off AC wall
transformers with rectifiers and Caps in your circuit.   Can be design
need specific.

Eric

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