Hi there,
I'm working on a research project where I would like to expose different substances to a range of air speeds. I figured that using a PWM fan in a small wind chamber I constructed would be a good way to carry this out. I learned about Arduino semi-recently and thought that it would be great to try to use it as a way to interface with the fan.
I understand that my PWM fan has 4 wires {Blue=PWM, Green=Tachometer/Sense, Yellow=12V,and Black=Ground}. I know that the Blue wire will go into one of the PWM pins in my Arduino and that the Black Pin will need to share a common ground with the Arduino and my external power supply.
I have googled around for quite some time for help with coding for an application that I thought would be fairly straightforward but given my limited coding experience I've found extremely daunting.
Basically, I have two questions:
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Is it possible to have a simple setup comprised of just the Arduino UNO, an external PSU, and a 12V PWM fan controlled by the Arduino? Or will I need to add other electrical components into my circuit(i.e.resistors) to make it work? I've found conflicting opinions on this matter.
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Most of the projects I've found online deal with powering multiple fans. I just need to power a single fan. Could someone point me in the right direction of a functional Arduino sketch? I've tried modifying and understanding several pieces of code I've found online but none of them seem to work once I reduced them to a single fan instead of multiple of them.
This is the fan I'm trying to use:
I have a Keithley 2450 Sourcemeter to power my fan:
and I'm using the Arduino UNO.
I reiterate, my ultimate goal is to control the fan speed using the Arduino. I would like to essentially be able to turn the fan on and off as well as be able to control the fan speed.
Thank you for any and all help.
