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Old 8th August 2005, 06:14 PM   #1
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Location: Lego Land
Default Thermo-Fan Project

can someone please help me with this, I want to built a Thermo-Fan controller, so in other words if the amp get's hot the fan must go on.

Example : http://sound.westhost.com/project42.htm

I want to built this one but I cant get or make the pcb design

So can someone please help me ?
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Old 8th August 2005, 06:18 PM   #2
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I wouldn't worry about the pcb, that circuit is simple enough to knock up on prototyping perfboard.
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Old 8th August 2005, 07:03 PM   #3
AndrewT is offline AndrewT  Scotland
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Hi,
look up the pulse width controller on this site. http://www.cpemma.co.uk/index.html
all the construction details are there including stuffing the perfboard to give a variable speed fan to keep your sink cooler.
PWC is better than lowered voltage since the full 12v is applied to the motor in short bursts and prevents it stalling, which can happen with lowered voltage drive. See if you can find some info on preventing PWC interfering with the input signal.
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