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pwm

 
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Codehunter
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pwm
PostPosted: Mon Nov 20, 2006 6:54 am     Reply with quote
Hi,

i want to use a pic18f452 for controlling my fans with pwm. Is it possible that i can use the harware pwm for only 2 fans?

Greets,
Codehunter
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Nov 20, 2006 1:00 pm     Reply with quote
You have two PWM channels in the 18F452. Use one channel for each fan.

The PIC can't supply much current to the fans, so you'll need an
external driver for each fan. I assume the fans run from +12v.
We used a logic-level FET (IRLIZ44N) as a low-side switch to control
a motor. There are many ways to do it.
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