Thread: Anyone try a Forward Converter?

Okay, here is the schematic, added to the PhotoPoint album. Post comments in this forum.

Presslab

Schematic Files

PressLab that looks intresting!
I'll give that a try this week when i get some free time.
For quick reference can you please tell me part numbers for the D1,D2,D3. Just want to know what you used.
Thanks

Originally posted by Fosgate:
<STRONG>PressLab that looks intresting!
I'll give that a try this week when i get some free time.
For quick reference can you please tell me part numbers for the D1,D2,D3. Just want to know what you used.
Thanks</STRONG>

D1 is a BYV32E. D2 are two SMBJ28A in parallel. D3 is a MBR745. The reason no part numbers are listed, is that those three devices are not the optimum parts. They are just what I had in my junk box.

Anything with a similar operation to the above parts will work, and actually the parts used are overkill. If you'd like you could use the same parts.

Presslab

press i know i could do the electronics in this but i'm not sure about winding the trransformer is there any way that you could do the transformer and sell it as a kit if you have the time

Hi PressLab,

thanks for you schematic, it's a big help, but what I still don't understand is the transformer part, the winding-stuff. In the pic you put up it says 3 turns, 2 strands (x3 on the primary site) and, just to pick one, 4 turns & 3 strand on the secondary site.
first: is the number of turns a ratio? as it would seem to me that only 3 turns would create a short circuit?
second: what is "3 strand"?

ohw noticed something else :
in one of your earlier posts you mentioned "National Semi. LM2671M-ADJ " but I can't find it in your schematic?

thanx & keep up the excellent work!

[ 08-17-2001: Message edted by: marsjell ]

[ 08-19-2001: Message edited by: marsjell ]

I was just wondering if anybody got a psu working the way presslab describes it?

Yeah.. me too...

I would like to do this, but don't exactly know where to start..

Maybe, someone (who managed to 'convert' their PS) is able to put a web site toghether along with some pictures exactly describing what to do...
(I volunteer in Making a site for this if someone could make pictures, and a 'manual' on how to do this..)

Greetz

Raas

Same here, this is the only REASON i havent started on the next box for customers or what not. Someone (**cough**) PressLab, Jeff...needs to have a site, step by step for all we wannabe electronic guys on what to do, i just hope we don't get electricuted doing it though

Charles,
if it is for a customer, have them pay for a real power supply.

I would not take the chance of a vehicle fire/totalling of a customer's car and the later lawsuit when you could charge him $200 more up front and buy an approved power supply.