Tevo Flash: Fight the noise (2 x 12V Fans)

thingiverse

Hello,\r\nI love my Tevo Flash but the noises of the main fan are too loud for me.\r\nYou can find many creative solutions on the web, this is one I came up with. The first step towards reducing noise is to increase air intake to 35-37mm. The original cutout had a diameter of only 30mm and produced unnecessary wind noise that bothered me. Since choosing quiet radial fans is very limited and a 50x15 fan is too hazardous for long term operation, I use two better 12V fans instead. The 50x15 fan is relatively quiet at 25db and inexpensive to get. The 40x40x30 fan is designed for server use and can run continuously for days on end. Even if the 50x15 fan were to fail, the performance of the 40x40x30 fan would be enough to protect my electronics. To ensure that two 12V fans operate safely at 24V, I simply connect them in series. This is the easiest option but may not always result in the quietest operation. Another approach is to use a suitable step-down circuit to reduce 24V to 12V, which would require connecting the fans in parallel. I also appreciate that this setup allows me to adjust fan speed with a potentiometer.\r\n In my case, I reduced the voltage to 7.5 volts and achieved an excellent balance between cooling power and noise.\r\n Give it a try!