Birdie Posted August 12, 2005 Report Share Posted August 12, 2005 hiI need some help in my school project.. i'm supposed to make a temperature controling system... where when it's hot a fan works & when it's cold a heater works... My problem is that I don't know what the realy switch is .. i never worked with it before & i dunno its connection so can anybody help me please... Quote Link to comment Share on other sites More sharing options...
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