Sometimes LM35 analog temperature sensors give inconsistent readings. Reading fluctuations are simply too high. Specially if LM35 sensor is connected using a cable that is a meter long or longer. There are some techniques tu compensate for those fluctuations and get more consistent readings.… Read the rest
Starting from hardware side of things, all components were tested separately on breadboard. Putting all this together in a manageable package is just a bit of work.
The compnents used here are: