08-19-2016, 05:46 PM
(08-19-2016, 05:31 PM)montero65 Wrote: Looks good. Can I ask how loud it is with the fan running? Do you hear it or is it small enough that you don't notice?
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The fan is a standard 5v 140ma brushless motor with horizontal curved blades, which can move up to five cubic feet per minute !
Yes, it is noisy. Everything from a white noise whirrrr to a very high pitched tone. That is why it is necessary to drive the motor via PWM and a driver transistor (PN2222, 2N2222). Other transistors will work too.
I have posted plans my driver circuit and python soft pwm codes on this forum. I will be updating those tonight (changes to the codes, and pics for how to mount the PN2222 in-line (no circuit boards).
With the motor speed controller circuit the fan is whisper quiet , yet still moves enough air to keep things efficiently cool.
marcushh777 
please join us for a chat @ irc.pine64.xyz:6667 or ssl irc.pine64.xyz:6697
( I regret that I am not able to respond to personal messages; let's meet on irc! )
please join us for a chat @ irc.pine64.xyz:6667 or ssl irc.pine64.xyz:6697
( I regret that I am not able to respond to personal messages; let's meet on irc! )
