Hello, I just started a project with LM35 (temperature sensors) with Arduino, after mounting it on my breadboard I noticed that the values in the serial monitor are inconsistent and vary in a strange way, for example I get 21°, 20°, 22° 24° successively which is impossible I get the same result with 5 different sensors, even whern i use a heat source the temperature the values vary also in a strange way and I don't know where the problem is can someone help me please? 
