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post #1911 of 1963
That's a shame! Now I have no alternative but to use Darlene's expertise since I don't have any experience with SMD soldering.

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post #1912 of 1963
hello Shoggy how do we get to know if the A6's for sale after the new revision is released are really the new revision ones ?

Since i'm "stuck" with 20 corsairs PWM fans its important for me to be sure that i'm buying the right one smile.gif
post #1913 of 1963
Without having the device in your hand and the knowledge where to look there is no way to tell if it is a current or earlier version.
post #1914 of 1963
Quote:
Originally Posted by Shoggy View Post

Without having the device in your hand and the knowledge where to look there is no way to tell if it is a current or earlier version.

Ok then, i wait for May or June since i still have a lot of parts to buy for the new computer ,i can order the A6 later thumb.gif

I'll send you guys an email to Aqua computer by that time ,just to be sure that i'm having the new revision biggrin.gif

Thanks
post #1915 of 1963
Quote:
Originally Posted by geggeg View Post

That's a shame! Now I have no alternative but to use Darlene's expertise since I don't have any experience with SMD soldering.

Gegged i'm sure you'll be more than OK with Darlene's expertise smile.gif
post #1916 of 1963
thumb.gif
post #1917 of 1963
I've PM'd Shoggy relative to the mod, now that he's let the cat out of the bag . . . .

Assuming a positive response, I'll try it on one of my A6's, and compare the results to my PCB's, and see just how much effort is involved.

Hopefully, I can help out some of you that already have a lot of Corsair fans and a current version A6.




A little more update . . . .

Shoggy was a sweetheart and filled me in on what he was referring to, and what range they expect to change the resistor values to.

I'm going to finish up my new PCB this weekend, and replenish some of my smt supplies this week.

My next 10 fans shipped today from PPCs, so they'll be here sometime next week so I'll have 18 total to use for testing.

I'll try to do the mod on one of my A6's, at least to 1 channel of it, and compare the results to what I get with my PCB next weekend.



Darlene
Edited by IT Diva - 3/14/14 at 4:57pm
post #1918 of 1963
Anyone know what microcontroller(s) I might use to create and analog voltage to pwm duty cycle converter? I'd really like to make the other channels on my aq5 lt pwm.
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post #1919 of 1963
Quote:
Originally Posted by Shoggy View Post

No, we will not offer anything like that.

If you have some experience with SMD soldering you can write us an e-mail or contact me directly to get information how it can be modified.

This is not very proper for those who bought the current version.
post #1920 of 1963
Quote:
Originally Posted by SeeThruHead View Post

Anyone know what microcontroller(s) I might use to create and analog voltage to pwm duty cycle converter? I'd really like to make the other channels on my aq5 lt pwm.


I've actually done quite a project on converting an analog, 0V to 12V output, to 0% to 100%, 5V, PWM signal.

The original purpose was to be able to use a Lamptron CW611 to run PWM pumps based on temp, but it would convert the 5 series, 2, 3 &4 channels to PWM just as well. . . . if you made several of them.


http://www.overclock.net/t/1395117/diy-voltage-controlled-scalable-pwm-controller

Ultimately, I concluded that using variable pump speed to manage temps was not a worthwhile pursuit, and after developing a perfectly working prototype for the analog input processing circuit that interfaced to the voltage controlled the PWM generator circuit, didn't pursue that part further.

I did however extensively develop the voltage controlled PWM circuit, and it's what I now use for all my PWM kit related testing.


But back to your inquiry;

Any of the popular microcontrollers with A/D conversion inputs and PWM outputs could be used. . . . maybe make a nice Arduino, (atmel controller) project

The equally tricky part is getting the voltage level translations managed, and buffering the micro controller's output.

You'll need to re-span the nominal 12V range to something useable by the rest of the design.

In mine, 0 to 100% needed 1/3 Vcc to 2/3 Vcc, or ~1.66V to 3.33V, if you use a micro, it'll be 0 V to Vref.

And then use a summing/differencing amp with an offset source to align the variable voltage to the proportional PWM %.

I did mine with analog technology, as it was a work in progress, with expanding capabilities as it progressed, and because some things are easier to have as hardware adjustable, like span and calibration trim pots so you don't have to write the extra code to set up span and calibration routines to run with digipots that complicate the circuitry even more.

Working with the CW611 was further complicated because its output is +rail referenced, so I needed an inverting differential amp to condition that input.


Anyway, It is an idea to ponder, and revisit . . . . . I just might have to have another go at this from a different end use perspective.


Darlene
Edited by IT Diva - 3/15/14 at 5:49am
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