How can I upgrade/develop this circuit to become more effective, efficient and complex.

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E/E Engineering

Joined Apr 15, 2016
2
FINAL CIRCUIT FOR LAPTOP COOLER (photo).png

My circuit is a automatic laptop cooler. I have try to add two more comparators in to the current circuit where each comparator lights a colored LED when a certain temperature is sensed, however i tried, but did not work for the reason i do not know how to combine them together. another idea was when a certain temperature is senered they will be a fixed voltage and they will be three LED with 3 fixed voltage, that come on when that certain temperature hits. e.g. 25ºC will be 5v which will light up LED 1 and 35ºC will be 8v which will light up LED 2, however this was too complex and did not work.

I will appreciate any help or advice and thank you for reading this.
 
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