Using PR11 to build smart ventilation system

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Using PR11 to build smart ventilation system

Postby Benjamin » Mon Sep 20, 2010 12:36 am



Hi, can i one of the temperature sensor with LDR,
and can i replace one of the brush fan with servo motor?
did I need any servo motor driver for it and which servo motor driver is suitable for it.
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Re: Using PR11 to build smart ventilation system

Postby redips_id » Mon Sep 20, 2010 1:26 pm

Hi Benjamin, this is my opinion..

Benjamin WROTE:Hi, can i one of the temperature sensor with LDR.

You mean, you want to replace one of the temperature, LM35 (3 pins) with LDR (2 pins)? Yes you can, but you need to modify your circuit and need to add a pull up resistor (about 10kohm).

Benjamin WROTE:can i replace one of the brush fan with servo motor?

Yes, but you need to modify your circuit again. If you refer to PR11 schematic, there only have 2 pins for fan A, now you need to change it to be 3 pins for servo (VCC, GND and servo pulse).

Benjamin WROTE:did I need any servo motor driver for it and which servo motor driver is suitable for it.

There have many ways to control servo, to be easier you can get the servo controller. However you also can program it directly from PIC, but you need to use interrupt timer program to produce 50Hz at servo pulse.
Request for complete solution for FYP? Why don't request for graduation certificate?
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Re: Using PR11 to build smart ventilation system

Postby Benjamin » Tue Sep 21, 2010 10:41 pm

Thankz
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Re: Using PR11 to build smart ventilation system

Postby Benjamin » Fri Sep 24, 2010 4:23 pm

I think the circuit have something wrong with the 12V power supply which connected to ground.According to the schematic that is uploaded.is it real?
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Re: Using PR11 to build smart ventilation system

Postby sich » Sun Sep 26, 2010 7:29 pm

which part do u mean?
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Re: Using PR11 to build smart ventilation system

Postby Benjamin » Mon Sep 27, 2010 11:01 pm

i mean this part..
270920101058.jpg
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Re: Using PR11 to build smart ventilation system

Postby hyng » Tue Sep 28, 2010 9:37 am

May i know what schematic is this? Your own schematic? Can you please upload another photo which zoom in at the part that you feel wrong.
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Re: Using PR11 to build smart ventilation system

Postby ober » Tue Sep 28, 2010 10:36 am

Benjamin WROTE:I think the circuit have something wrong with the 12V power supply which connected to ground.According to the schematic that is uploaded.is it real?

Checked schematic provided under PR11, din really notice there is connection that show 12v connected to Gnd, the 12V from adapter is connected to main power switch and also brushless fans which are further controlled by transistor..... which part is connecting to the Gnd?
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Re: Using PR11 to build smart ventilation system

Postby Benjamin » Sat Jan 15, 2011 9:00 am

I so sorry for it...the problem is solve.This is due to my misunderstood with the circuit.
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