HP DPS-700GB 80mm fan shroud

thingiverse

This is a fan shroud for the inexpensive HP DPS-700GB hot swappable server power supply. It's a great supply for many applications up to 700W and voltage can be tuned to about 13.5v. The power supply does not come with a fan, as it relies on the server's fans, so you must supply your own. It will otherwise overheat on idle. I use this to power 2x ISDT SC-608. Since they require about 13.4v to get full 150W power output, I added a 1.3kOhm voltage adjustment resistor, which boosts voltage to about 13.5v. You may use something like a 2kOhm resistor for closer to 12.7v, or neglect the resistor entirely to use just about ~12v. This will be enough to power the ISDT SC-608 at about 120W. I charge at 8C sometimes so I chose to add the resistor. Requires: 1x HP DPS-700GB 700W PSU 2x M3x6 screws 1x M3 nut 1x standard 80mm x 80mm x 25mm fan (optional) 2x M4x30 screws (optional) 2x M4 nuts (optional) 1.3kOhm resistor The tolerances are designed so that the fan press fits into the mount. However, M4 mounting holes are included in the print. The print needs just minimal support for the screw mounts. To mount the shroud, simply screw in the M3 screws as in the picture. The top M3 is threaded into the PSU, but the side M3 screw hole is not threaded, so you will need to use a nut. Included is a partial pinout. You must bridge the 3 marked connections to turn the power supply on. I soldered the voltage adjustment resistor for 13.5v. Next I soldered power out connections; the holes on bottom are for your wires out, and they will fit an XT60 connector, but it's recommended you thread your wires through the holes before soldering. I believe the 12v rails are separate, so distribute power draw accordingly. I would keep power draw to 15A per pair of pads, but you may easily parallel pads on top/bottom. Finally, I installed my fan and then soldered the wires to the 10v rail, for slightly lower noise. Remember that the fan wires must go inside the shroud before you solder or you will not be able to wire it in. Please let me know if you have any questions or issues. Printed on a Lulzbot Taz6 with .5mm nozzle head and .35mm layer height. Print Settings Printer Brand: LulzBot Printer: TAZ 6 Rafts: No Supports: Yes Resolution: .3mm Infill: 15 Notes: Have fun