892
edits
Difference between revisions of "Open Biotech/PCR"
Jump to navigation
Jump to search
m
→Fans and heatsinks
| Line 181: | Line 181: | ||
== Fans and heatsinks == | == Fans and heatsinks == | ||
5 or 12 vdc 5x5 cm. | Should be 5 or 12 vdc 5x5 cm. We should use standard CPU coolers since they are cheap an easy to find, which is important since this is the only moving part in the PCR machine and will likely need to be replaced at some point by the user. | ||
*[http://www.digikey.com/product-detail/en/KDE1205PHV2%20MS.A.GN/259-1357-ND/1021206 $4 fan from digikey] (drops to $2.90 for 100). | *[http://www.digikey.com/product-detail/en/KDE1205PHV2%20MS.A.GN/259-1357-ND/1021206 $4 fan from digikey] - no heatsink included (drops to $2.90 for 100). | ||
*[https://www.sparkfun.com/products/9648 $5 fan from sparkfun | *[https://www.sparkfun.com/products/9648 $5 fan from sparkfun] - no heatsink. | ||
*Fan with built in heatsink for $6.20 [http://www.google.com/shopping/product/13394255327842041335?q=cpu%20fan&hl=en&psj=1&bav=on.2,or.r_gc.r_pw.r_qf.&bvm=bv.42261806,d.cGE&biw=1024&bih=613&sa=X&ei=SvkZUamMBaKsjAKMhYDwAQ&ved=0CH8Q8wIwAA&prds=scoring:tp via google] | *Fan with built in heatsink for $6.20 [http://www.google.com/shopping/product/13394255327842041335?q=cpu%20fan&hl=en&psj=1&bav=on.2,or.r_gc.r_pw.r_qf.&bvm=bv.42261806,d.cGE&biw=1024&bih=613&sa=X&ei=SvkZUamMBaKsjAKMhYDwAQ&ved=0CH8Q8wIwAA&prds=scoring:tp via google] | ||
*Fan with built in heatsink, but a bit too big for $5.00 [http://www.outletpc.com/c1987.html?utm_source=c1987&utm_medium=shopping%2Bengine&utm_campaign=googleproducts via outletpc.com] | *Fan with built in heatsink, but a bit too big for $5.00 [http://www.outletpc.com/c1987.html?utm_source=c1987&utm_medium=shopping%2Bengine&utm_campaign=googleproducts via outletpc.com] | ||
| Line 191: | Line 191: | ||
Assuming the fans are 12 volts, the NPN 2N3904 can be used (but it's max 200 mA) [https://www.sparkfun.com/products/521 via sparkfun] at $0.75 but they're less than 10 cents at 100x. | Assuming the fans are 12 volts, the NPN 2N3904 can be used (but it's max 200 mA) [https://www.sparkfun.com/products/521 via sparkfun] at $0.75 but they're less than 10 cents at 100x. | ||
= Power supply = | = Power supply = | ||