Voodoochile
Supafly & The Funky Pimps
- Joined
- Sep 13, 2002
- Posts
- 4,883
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Hey, I said this was going to be minor... I finished up the NAPS-1 using the board I made with trimpot pads for setting the output. While I was poring over the datasheets for the Linear Tech regs, I noted that there was mention of how critical it is to keep the 'feedback' resistors (R1 and R2 in this schematic) as close to the output pin as possible. Solder it directly if possible, to maintain the best regulation performance, in essence. Well, by swinging D1/R1 and D4/R2 90 degrees, the schematic is basically unchanged, but the resistor it at the pin, instead of 3/4" away, and after the junction of the diode.
I'll probably move this (layout) around a bit to allow the parts to lie down before I use this again, but it was quite straightforward, and it does check out to be tighter regulation, though I am starting to split hairs here. A detailed picture is here, and for reference, the original parts positioning is shown on this version, which is stock, no trimpots.
Just a thought for anyone building a similar PS, even if they were to build the actual PS1, this mini-tweak would work on the commercial board as well.
edited for crummy typing
I'll probably move this (layout) around a bit to allow the parts to lie down before I use this again, but it was quite straightforward, and it does check out to be tighter regulation, though I am starting to split hairs here. A detailed picture is here, and for reference, the original parts positioning is shown on this version, which is stock, no trimpots.
Just a thought for anyone building a similar PS, even if they were to build the actual PS1, this mini-tweak would work on the commercial board as well.
edited for crummy typing