(07-21-2016, 10:28 PM)MarkHaysHarris777 Wrote: @ Boring, no, it DOES NOT WORK to control a motor speed (particularly brushless motors) with a potentiometer in-line with the motor. Motor speed is controlled with pulse width modulation (a duty cycle where the 5v is on 30% and off 70% will slow the motor to %30)... and still have 5v running to the motor... no energy is lost to heat.
@Bluphire, please read through this entire blog on the Raspberry PI site. It contains my journal (with pics) for cooling my Raspberry PI 3B units in the Black Ice Zebra Case... I'm using the Gertboard's ULN2803 as the motor driver, and the PWM of the PI to control the speed duty cycle. Of course this same technique will work with any SoC (system on a chip) and any SBC (single board computer), including but not limited to the PineA64, the Raspberry PI, the Arduino, the pyboard, &c.
marcushh777
Thank you, I will check it out and bug you via IM when I undoubtedly have questions.
Matt
ETA: Nevermind, I guess I will not be doing what I wanted to do. That process looks far too advanced for me to do. Thank you for your help anyways.
Matt
+1 me if I have helped you in any way. Thank you.