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Thanks so much for this perfect duct. I have printed this in ABS and I also bought two Sunon 5015 blowers.
These two blowers are 12V so I connected them through a buck converter. One problem I now discovered was
that I can't control the fan speed (I think it's called PWM), probably because of the buck converter.
My question is, can I remove the buck converter and instead connect these two blowers in series (12V+12V=24V), and
in that way be able to control the fan speed again? I dare not try until some technical expert confirms that this is totally okay. :-)