Clean 12V Supply
Is there a convenient way to get a clean supply out of the regular battery line when powering an LCD other than using the computer supply? Magic voltage reg. perhaps?
I would probably use the computer power supply to keep it simple. that way, everything would have the same power supply possibly avoiding ground loops and interference.
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Paralleling voltage regulators is very tricky, as one will always sink more current then the other. In that situation, one will heat up faster and go into thermal cutout. The other will then do the same, at which point they will both cool down and the cycle will repeat. If you are going to use regulators, get the TO-3 equivelant of the 7812, or just use the PC power supply. You will also need filter capacitors no matter what approach you take.
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Would you have this trouble running the max series of voltage regulators? Am planning on building a Dc-Dc PSU similar to the sproggy design, but I want to doubble up on the current...was considering just doubbling up on the circuits (ie. 2 * 5v etc)Hmmm
any schematics out there for these circuits you guys are talking about?
Check my website, it has schematics and PCB layout for a simple DC-DC converter.
I build it myself, it supplies 5V@10A (two MAX787 in parallel) and 12V@3A (with the MC34167T). The regulators and coils can be ordered FOC as samples (check the links in the menu).