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1  Using Arduino / General Electronics / Re: LM317 Help on: July 08, 2011, 06:17:42 am
Ok, so I finnaly got my hands on all the parts I need, but there's a problem... It's not working smiley-sad

When I tap the FET the fan starts spinning and if I don't do that nothing happens...

I'm guessing that the FET is damaged, but am not sure...

What do you think?
2  Using Arduino / General Electronics / Re: LM317 Help on: June 01, 2011, 01:59:42 pm
I'm currently "worried" so to say about the divider.

Will it allow me to change the voltage 2x a second?
3  Using Arduino / General Electronics / Re: LM317 Help on: May 29, 2011, 06:39:16 am
For the divider I'm not sure if 1k resistor and a 18uF capacitor will suit my needs...

For the fan control I will be regulating 12V, the voltages which will be "available" for the fans are: 7V, 8V, 9V, 10V, 11V, 12V and will be changed as the temperature of the CPU Changes. I'm expecting the voltage change to occur no higher than 2x a second.
4  Using Arduino / General Electronics / Re: LM317 Help on: May 28, 2011, 01:06:48 pm
Thank you! smiley-grin
5  Using Arduino / General Electronics / Re: LM317 Help on: May 27, 2011, 04:57:53 am
I think I found something that will fit my needs: http://eu.mouser.com/ProductDetail/Fairchild-Semiconductor/FDP7030BL/?qs=sGAEpiMZZMvECErq9cesgOhjwE8m5zTM4sOaJqrLpIU%3d


Now for the (hopefully) last question: How do I connect everything? smiley-razz

Something like this?

                                                                      12V
                                                                       |
                                                                       |Source pin
                                                                       |
|Digital Pin 9|----|Resistor|----|Capacitor|--Gate--|MOSFET|
                                                                       |
                                                                       |Drain pin
                                                                       |
                                                                      Load(Fan)
                                                                       |
                                                                       |
                                                                       |
                                                                     GND
6  Using Arduino / General Electronics / Re: LM317 Help on: May 26, 2011, 11:48:33 am
@Grumpy_Mike

So: N-Channel FET, TO-220, 5V Turn on voltage, low on resistance, low resistance drain-to-source, and of course, drain source voltage high enough and same for current ?
7  Using Arduino / General Electronics / Re: LM317 Help on: May 26, 2011, 06:12:47 am
Can anyone tell me what I must pay attention to when choosing a FET for using it to regulate voltage with Arduino?
8  Using Arduino / General Electronics / Re: LM317 Help on: May 26, 2011, 04:12:51 am
I found something a bit cheaper than the previous I linked and am not sure if it will work...

http://eu.mouser.com/ProductDetail/Fairchild-Semiconductor/FDP6030BL/?qs=sGAEpiMZZMutXGli8Ay4kBEMMAKgSkd8MdwkNnQ%2fGU8%3d
9  Using Arduino / General Electronics / Re: LM317 Help on: May 25, 2011, 01:42:13 pm
Alright! smiley

Now, if only I could find that in Eagle smiley-razz
10  Using Arduino / General Electronics / Re: LM317 Help on: May 25, 2011, 12:48:38 pm
@Grumpy_Mike

Thanks! smiley-grin

I hope I'm not too annoying with all these questions smiley-razz, maybe something like this? http://www.nteinc.com/specs/2900to2999/pdf/nte2987.pdf

Could you also tell me what exactly am I look for? N-Channel MOSFETS?
11  Using Arduino / General Electronics / Re: LM317 Help on: May 25, 2011, 09:21:13 am
So I use Frequency dependent potential divider with low pass filter connected to a FET, and the divider is hooked up to Arduino PWM output pin? And if so, which FET should I use?
12  Using Arduino / General Electronics / Re: LM317 Help on: May 25, 2011, 08:10:31 am
Can you give me more info on using FET's with Arduino? Schematic(s), Maybe even some example code  smiley-wink
13  Using Arduino / General Electronics / Re: LM317 Help on: May 24, 2011, 12:48:34 pm
I'll be using the same PSU for: Pumps (Water Cooling), Micro Controllers, Fans
14  Using Arduino / General Electronics / Re: LM317 Help on: May 24, 2011, 12:05:35 pm
Thanks for the replies guys smiley-kitty

Any idea on how I would get more than 12V with a PC PSU?
15  Using Arduino / General Electronics / LM317 Help on: May 24, 2011, 11:51:15 am
Hello again smiley

I will be making an Arduino fan controller which will regulate the voltage on the fan with the help of the LM317 Voltage Regulator, now I have made a schematic and I have a question:

The input voltage will be 12V from a PC PSU, will the LM317 be able to give 12V output?



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