At present we can see the temperature of this planet is increasing day by day so that the people use various types of things to overcome that matter some rich countries use air conditioners but poor countries cant use ac machines because they have to pay unbearable electricity bill.you all know Free Circuit Diagrams 4U always think about all the nations ,all the ages etc. we always try to be balance when we post something that is why we have come to this level.OK, Today we are going to give you a Automatic fan circuit .That means you can operate this circuit with 6V to 12V power.The special thing of this circuit is this circuit is switched on and off according to the temperature of the environment.Here we have used LM35 as the temperature sense sensor and BC 548 to amplify the current.
Note : Build this circuit on a PCB
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