m00dawg Posted November 7, 2009 Report Posted November 7, 2009 Because of the way I am powering my MB-6852, I wanted to supply 5V to the 40mm case fan in the MB-6582. Just to have something, I bought a cheap RadioShack 40mm fan and it works well - once it gets going. 5V is not enough to get the fan to start spinning (I have to help it), but once it's going it works well. My question is - does anyone have any recommendations for a 40mm fan that will run at 5V? I looked on Performance-PCs.com (the site Wilba recommends from the wiki) and did find quite a few 40mm fans, but none that were rated for 5V. Yes, I could use the 9V supply but I'd rather not since these power the SIDs analog parts and I don't want to introduce any noise by the fan if at all possible. Thoughts? Quote
lylehaze Posted November 7, 2009 Report Posted November 7, 2009 Because of the way I am powering my MB-6852, I wanted to supply 5V to the 40mm case fan in the MB-6582. Just to have something, I bought a cheap RadioShack 40mm fan and it works well - once it gets going. 5V is not enough to get the fan to start spinning (I have to help it), but once it's going it works well. My question is - does anyone have any recommendations for a 40mm fan that will run at 5V? I looked on Performance-PCs.com (the site Wilba recommends from the wiki) and did find quite a few 40mm fans, but none that were rated for 5V. Yes, I could use the 9V supply but I'd rather not since these power the SIDs analog parts and I don't want to introduce any noise by the fan if at all possible. Thoughts? Fans aren't as picky as chips when it comes to voltage, as you have found.. Since the 5 volt regulator is usually running warm anyway, I would not add the fan to that load, but what is your unregulated voltage? After the bridge, before it goes into any regulators, you could tap power without adding heat from any regulators. Or you could add a pull rope like my lawnmower to get it started from 5 volts. :) LyleHaze Quote
latigid on Posted November 7, 2009 Report Posted November 7, 2009 I'm probably wrong, but can't you add a series capacitor to get motors cranking? But I agree; using some unregulated voltage is a good idea. You could even add a resistor to control the speed (noise). Quote
lylehaze Posted November 7, 2009 Report Posted November 7, 2009 I'm probably wrong, but can't you add a series capacitor to get motors cranking? But I agree; using some unregulated voltage is a good idea. You could even add a resistor to control the speed (noise). If I understand "Series Capacitor".. that would pass AC but block DC.. Since it's a DC fan, I'm guessing that wouldn't help much. But I may be misunderstanding you.. :) LyleHaze Quote
fussylizard Posted November 8, 2009 Report Posted November 8, 2009 I used a 5V fan from Mouser, p/n 664-AD0405DB-G70-LF along with fan guard 562-08149. Work great. Quote
latigid on Posted November 8, 2009 Report Posted November 8, 2009 If I understand "Series Capacitor".. that would pass AC but block DC.. Since it's a DC fan, I'm guessing that wouldn't help much. But I may be misunderstanding you.. :) LyleHaze Ehh, yeah, I'm thinking of an AC motor. Please ignore :blink: Quote
m00dawg Posted November 8, 2009 Author Report Posted November 8, 2009 Unregulated power might be an option for some, but I am supplying power using an external PSU that feeds the MB-6582 9V and 5V. The great thing about this is that all the heat from the regulation is external to the case and I have more room to use things like power resistors, etc. The PSU is still a work in progress, but works quite well. The only downside is that I am limited in my fan choice, although it looks like the fan from Mouser will perfect! Thanks for the help! Quote
Wilba Posted November 8, 2009 Report Posted November 8, 2009 Can you guys please update the MB-6582 wiki with pics and links to the Mouser offerings? :) Quote
fussylizard Posted November 8, 2009 Report Posted November 8, 2009 Can you guys please update the MB-6582 wiki with pics and links to the Mouser offerings? :) Will do. I have my entire parts list I need to add to the wiki from my build with all the Mouser part numbers, bolts/hardware from McMaster-Carr, etc. I've been meaning to post all this for ages. Quote
tarzan boy Posted January 7, 2010 Report Posted January 7, 2010 Will do. I have my entire parts list I need to add to the wiki from my build with all the Mouser part numbers, bolts/hardware from McMaster-Carr, etc. I've been meaning to post all this for ages. Would you mind pm'ing me that mouser list? Its still not on the wiki. thanks tb Quote
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