Battery Powered Desk Fan

prusaprinters

When the weather got hot this summer, I designed a portable desk fan to keep me cool.   I'd been experimenting with the battery connector for a little while and wanted to try it in a useful application. When the winter comes I'll use a similar design to power lights on my bike. I used a Noctua NF-P12 Redux fan and a Lidl (Parkside) battery.  Any fan of the correct voltage and size should work and I think some other manufacturers make batteries of the correct geometry. You might also be able to redesign the battery connector to fit other brands of battery. Surprisingly stable because most of the weight is in the battery. Airflow can be felt over a metre away. Designed to be compatible with printed nozzles or laminarisers. Could be throttled using PWM (if the fan has 3 or 4 pins).This setup can run for many hours before it needs to be recharged. (in theory over 22 hours but I've not tested it yet)BOM: 1x fan mount1x fan bracket1x fan battery1x 120mm x 25mm 12v computer fan1x triangular 12V battery pack4x M4x30 bolts (not countersunk. Use M4x35 or longer if you want to add a nozzle)4x M4 nuts3-5x M3x8 countersunk bolts3-5x M3 nuts2x 1mm x 3-5mm x 45-55mm brass/copper strips (I cut these from a 1mm sheet using snips) 2x electronic wireselectronic solder