In advance English ain’t my first language so this post might be a little bit hard to read, sorry for that.
Also I am in no way familiar with electronics my major is actually in mechanical engineering and I am just starting.
So let’s get straight in.
In this project I am using:
- The Arduino Uno (Rev.3)
- An old 4 wired Dell brushless fan, 12V. Lost the label, so I am not sure if it’s either 0.75 or 2.5 A, though I think it’s 0.75 A since my AC adapter doesn’t have any problems running it
- An AC adapter, 12V 1A
- 4 led’s (3 red, 1 blue), a few resistors, a potentiometer, on-off switch…
I have got a little circuit going on to control the speed of my 4 wired, it should work as planned and I have made grate progress by just googling or researching the answers to my questions.
Now I have come upon a little problem that I haven’t found an answer for yet and annoys me a lot.
I have read all over the internet that I have to wire the arduino and the fan to it’s own power circuit with a common ground. This works totally fine but I need to use one power supply for both ther arduino and the fan. I don’t mean to hook the fan directly to the arduino, but just to share the output between the arduino and the fan, as shown in the graphic below.
Maybe I am missing something but it seems like this could be the simple solution.
But fellow potential problems I have found at my researches:
- too high Ampere draw from the arduino (shouldn’t be the case since the fan isn’t directly hooked to the arduino)
- higher voltages for the arduino means higher heat distribution (going to solve that by applying a heat sink if necessary)
- Power supply to weak to mange both, the arduino and the fan
- electrical noise from the fan
Well those are the few things I have found, but I have no clue if those apply to my scenario and if so how to solve them.
I should mention that I am going too hook up the 3 led’s and the potentiometer to the arduino, if this is a problem.
I also might switch to the arduino nano, if this problem is manageable, since it would fit more into my purpose.
And remember guys I am a total newbie to this stuff, so be patient with me