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Old 1st May 2005, 06:24 PM   #11
sklimek is offline sklimek  United States
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Default P2P reg. bd.

Hi Jarros, if you still wanted to do P2P maybe this would help.

Stan
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Old 2nd May 2005, 07:25 AM   #12
jarros is offline jarros  Canada
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Default Re: P2P reg. bd.

Quote:
Originally posted by sklimek
Hi Jarros, if you still wanted to do P2P maybe this would help.

Stan
Thanks for the pic Stan. That looks fairly simple, I should be able to pull it off.

Where's the best place (cheapest) to buy components for these projects?

Jared
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Old 2nd May 2005, 02:51 PM   #13
sklimek is offline sklimek  United States
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Default Parts...

Check for a Radio Shack nearby and anything else use;

http://www.digikey.com/
http://www.alliedelec.com/default.asp
http://www.partsexpress.com/

Keep your new soldering "tinned".

Stan
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Old 2nd May 2005, 03:34 PM   #14
sklimek is offline sklimek  United States
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Default Also...

This is where the schematic came from it will help in sourceing...

http://www.diyaudio.com/forums/showt...035#post451035
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Old 2nd May 2005, 10:26 PM   #15
hermanv is offline hermanv  United States
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Default parts availability

Almost all the IC manufacturers now allow you to buy directly from thier web sites. The parts are reasonable but if you only buy one item the shipping cost is disproportionate.

For regulator ICs try ON Semi, Fairchild Semi, Philips, National Semi or just search for three terminal regulator on a search engine.

Digikey and Mouser are two tried and true suppliers that carry lots of stuff. You will need to be pretty sure of what you want before you go to their sites because they offer little general help. The advantage is that resistors , capacitors, heat sinks etc can all be purchased at once so you only pay shipping once. I think both suppliers wave handling fees if your order exceeds $25.00

Once you buy from them a nice thick catalog will eventually arrive in the mail for the next time you need somthing. Both will get you the stuff as fast as you can afford. I've ordered in the afternoon and had it in my hands the next day before noon but there is a steep premium for this kind of service.
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Old 2nd May 2005, 10:58 PM   #16
jarros is offline jarros  Canada
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Awesome info guys, I really appreciate the help.

One thing I noticed in digi01's post regarding the regulator was that the trim pot allows the output voltage to be adjusted from 20V to 32V, which is a little high for the range I'm looking at.

I just noticed that in the Class D forums motherone also used digi01's regulator board, but made a few small changes as noted in this post. I'm a little unsure as to where these changes take place in the schematic, so I asked in that thread as well. One change includes using a LM1085 regulator instead of the LM338 that digi uses. Would this enable me to set the regulator to 13V, or should the LM338 be able to do this aswell?

Again, thanks for taking the time to help me out. I feel we're getting pretty close!

Jared
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Old 2nd May 2005, 11:28 PM   #17
sklimek is offline sklimek  United States
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20 to 32 volts is more an indication of the used transformer for I believe a Gainclone in Digi's thread. Go to National Semi and download LM312 and LM1085 and check their capabilities. After you dial in the correct volts w/ the trim pot replace it w/ a fixed resistor. If Motherone is able to answer you'll be in good hands.

http://www.national.com/
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