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Author Topic: Trouble with a boost converter  (Read 2335 times)
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Hofstadter's Law: It always takes longer than you expect, even when you take into account Hofstadter's Law.
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If you are looking to get 25V at a significant current, you would be better off using a higher voltage to begin with, then reducing it to 5V for the Arduino and any other logic.

Two things that are very critical for a successful switching regulator are the inductor (high enough saturation current, low enough loss) and the circuit layout - in particular the path taken by the switched current.
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That is an annoyingly good idea.  I can get a 24 V supply right out of the wall.
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What I'm looking at now is starting with a 24 V wall wart.

I have a current-limited loop that I want to have the full 24 volts available to, in the hopes of saturating it so I can control it properly.  Then I also want to power the Arduinos with it since it's available, it cuts down on my cables from 3 to 1, so I'm using a buck converter to drop it down to 12 V.

My inclination is to put the current-limited loop in a non-complicated parallel setup with the buck converter, but my inclinations have been wrong in the past. (For instance, I just discovered that the polarity of capacitors does mean something, and about half of my capacitors are hooked up backwards as a result.  Crap.) Do I need to fancy this up at all?
« Last Edit: August 05, 2012, 05:12:56 pm by aoeud » Logged

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Oh, PCB is being suggested for soldering stuff to.  I'm ordering stuff now, but I'm not sure what exactly I'm looking for in that regard.  Can anyone help me with this?
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Yes IF you state accurately your power supply requirements. This is a link to an easy to use part available in several different current capacities... I used a lot of them from 2003 to 2006 and they all worked very well for me.
http://www.stanford.edu/class/ee122/Parts_Info/datasheets/LT1170.pdf
Figure out what You'll need and let me know. I'll be happy to help as much as I can.

Doc
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