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PostPosted: Sat Aug 12, 2017 2:21 pm 
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Hello there mates,

I am endeavoring to make a circuit of fan speed controller as my school expands. As the going with circuit shows up:

The circuit is made up by a 12V DC fan speed controller using LM2914CT which is conveyed by Texas Instruments. According to the datasheet of P0080EBMCLRP2, https://www.icrfq.com/part/543989-P0080EBMCLRP2.html it positive voltage controller incorporates the ability to source 1A of yield current with an average dropout voltage of 0.5V and a most outrageous of 1V over the entire temperature run. Moreover, the LM2941CT is protected from the pivot battery foundations or two-battery ricocheted.

I am sure that the IC is sensible for my wander. I similarly got the required yield on the breadboard, However, I fail to get yield on PCB when the organization is done on sell programming; I figure I don't know to use the fledgling programming. So would anybody have the capacity to please help me the arrangement of this circuit?It will be of giant offer help.

Warm welcome and Regards !


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PostPosted: Sat Aug 12, 2017 3:53 pm 
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I don't think this site is the place to ask this question.
But anyway in the hp series the fan control is a PID algorithm using PWM.
p=proportional
D= derivative.
G=gain
Using a rise and slope for the p value of the temperature difference from actual to setpoint.
PWM =pulse width modulation ( which is just a way to pulse the power on and off to go from 12vdc to say 2vdc to the motor.Insted of say a dimmer that lowers the voltage. Does the same thing but using a different method.

There are tons of articles on pid and you need to google them.
For what they call tuning a pid is somewhat a experienced talent. playing with each of the pid component values to achieve success.
If you want to try, start with the p portion then add the I portion then the integral.
Then the gain.

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PostPosted: Sun Aug 13, 2017 6:25 am 
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Thanks for guiding me, I hope it would be helpful for me.


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PostPosted: Sun Aug 13, 2017 8:46 am 
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Oh my, yes, this site probably does have some people that "did" play with building their own circuits back in the day.
I think I still know where my soldering iron is but have not used it in years.

I think you would need a more Electronics related forum with what your doing. As you know, now days everything is pretty much plug n play and the art of circuit building is being lost.

Now days one can buy something cheaper then building it:
http://www.ebay.com/itm/12V-PWM-PC-CPU-Fan-Temperature-Control-Speed-Controller-Module-High-Temp-Alarm-/112174066548?epid=516837131&hash=item1a1e186b74:g:~aMAAOSwA3dYCLQH

But I realize the fun of doing it your self is the whole point :-)
Good Luck and enjoy.

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