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From: email@example.com (N. Thornton)
Subject: Re: How to make/solder a circuit fast?
Date: 15 Sep 2002 07:36:38 -0700
References: <firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org>
NNTP-Posting-Date: 15 Sep 2002 14:36:38 GMT
OK, I understand your temp figure now. But pushing a little reg to its
specification limits in a project like this is not an issue to be
honest. As someone rightly said, when youre doing home experimenting
you can push things further than a comercial house would.
Its a real shame youre not tapping into a steady 12v supply rail. Are
you really sure thers not a way you could do it safely?
BTW if you want a newspaper PCB to look professional, give it a quick
spray paint. PCB colour preferably. Or easier use a sheet of coloured
paper or card on the top. And if you must hide the rat nest
underneath, er, more papier mache? Lol.
email@example.com (The little lost angel) wrote in message
> On Sat, 14 Sep 2002 15:24:55 +0000 (UTC), Ian Stirling
> >Red can have a voltage of down to about 1.6V, Blue LEDs can be closer
> >to 4V (all at 20ma)
> Even the superbright reds would go that low?
> >I'd say you'r going way too complex, if the device is in a PC, it's
> >much easier.
> >You have a regulated 12V supply available, there is absolutely no
> >point in putting in another regulator.
> It's not quite exactly in a PC... these guys have all these
> PSU with transparent fans. The hot thing now is the Antec with lights
> in them... but costs a megabuck. A friend of mine wondered if we could
> just put LED into an existing PSU for the same effect.
> So I looked at one and realized it could be done by tapping
> the +12V line that goes to the fan. It has a plug that can be
> unplugged easily. However the PSU thermal controls that +12V line so
> it goes from 6v to 12V. Which is why I don't have a regulated +12V for
> I don't think anybody here would advice me to attempt to tap
> from the regulated +12v since I could very well end up blowing the PSU
There must be ways to connect it that would be safe and secure. It'd
make life far easier. BTW why is the 12v out supply any more
vulnerable than the fan supply? If anything I would think it is better
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