Darin, the clock may get a little warm, but I think you may be worrying overtly. The holes under the case allow air to circulate up and through/around the PCB and out the holes around the tubes by convection. If you do plan on adding a fan (I don't think this is necessary, but hey it's a free world), take into account that the circuit has a 500 mA polyfuse, so if you plan on adding the fan to the circuit side 12V rail make sure it doesn't draw more than 100 mA or so.
Nick On Tue, Oct 7, 2014 at 6:52 PM, Dman777 <[email protected]> wrote: > I will drill some small holes for cool air intake on the sides and on >>> top. >> >> > The fan will be drawing out air from the bottom. I won't change that. With > the heat dispersed, it will not be issue as it is in one concentrated > spot. I am more concerned with the questions I have in mind from the > original post, please. > > Thanks, > -Darin > > On Tuesday, October 7, 2014 8:18:59 PM UTC-5, Dman777 wrote: >> >> I have a 6 digit Nixie ZM5660 clock that I got from pvelectronics that is >> beautiful and super cool. Everything is perfect about it. However, since it >> is multiplexed there is one spot that has a very high concentration of >> heat. I want to place a fan underneath the clock to draw out this hot air, >> otherwise the life of the clock will not be as long as it will without the >> heat. >> >> I will be taking dremel and drilling a large area underneath the case and >> placing a fan against the case surface(outside of the case) to draw out the >> hot air. I will then wire the 12v fan to the power supply connectors. When >> done, I will be placing the clock case on two blocks so there will be about >> 3 inches of area between the bottom of the clock(with the fan) and the >> shelf it sits on. I addition, I will drill some small holes for cool air >> intake on the sides and on top. >> >> A few questions come to mind, please: >> >> 1) The case is only 3/4 of inch deep. Should I go for a 2 inch fan or 1 >> inch fan? Typically, a 2 inch fan will draw more heat out. But since* >> there will only be able 3/8" of space between the fan and circuit board*, >> I am not sure which would be more effective in drawing heat out. >> >> 2) The source of heat is in the center middle of the clock. If I place >> the middle of the fan directly underneath the heat concentration, will that >> heat just sit since it won't be above the blades but instead above the >> rotor? Should the fan be off center to the actual heat concentration? >> >> 3) I would like a fan with a good ratio of not to loud but move enough >> heat out. Not sure which would be a good cfm. >> >> 4) I don't understand why, the heat concentration is in the dead center >> of the clock, but the source of what I think is the source of the >> heat...the 7805 voltage regulator... is of to the side of the source of the >> heat concentration area. >> >> 5) Do I need to worry about trace erosion from air flow and friction? On >> my old Xbox I had the fan running high in it and one of the traces eroded. >> >> Here are some of the fans(Would like to stick with ball bearing) I have >> been looking at. I am big fan of Sunon: >> 1 inch: >> http://www.jameco.com/1/1/2967-kde1203pfb2-8-ms-dc- >> brushless-tubeaxial-fan-bearing-type-ball.html >> http://www.jameco.com/webapp/wcs/stores/servlet/Product_ >> 10001_10001_1708465_-1 >> >> 2 inch: >> http://www.jameco.com/webapp/wcs/stores/servlet/ >> ProductDisplay?refineValue=Ball&refineType=1&langId=-1& >> position=1&productId=1950446&refine=1&catalogId=10001&history=6fqaemmj% >> 7CsubCategoryName~DC%2BBrushless%2BFans%5Ecategory~ >> 3715%5EcategoryName~cat_37%5EprodPage~15%5Epage~SEARCH% >> 252BNAV%401bnairch%7Ccategory~371530%5EcategoryName~cat_ >> 3715%5Eposition~1%5Erefine~1%5EsubCategoryName~DC% >> 2BBrushless%2BFans%2B%252F%2B2.00%2522%2B%252850mm%2529% >> 5EprodPage~15%5Epage~SEARCH%252BNAV%40dnogx9g3%7CrefineValue~SUNON% >> 5ErefineType~1%5Eposition~1%5Esub_attr_name~Manufacturer% >> 5Erefine~1%5EprodPage~15%5Epage~SEARCH%252BNAV&sub_ >> attr_name=Bearing&storeId=10001&ddkey=http:StoreCatalogDrillDownView >> >> Thanks, >> -Darin >> >> >> >> >> >> >> >> >> >> >> >> >> -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/5d257e7b-2330-407e-ba00-147f62ee78f7%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/5d257e7b-2330-407e-ba00-147f62ee78f7%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CAOX%2BRHJgurcFjwwGWAM6vhH7-5_i5sEshGow319e2EMB2qumCw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
