Hi, I’m going to implement a PID controller to control the temperature of the air inside a box/electronic enclosure or anything else that I decide to use, I’m going to use and control a heating element and a fan to keep the temp inside the box at 50c or close to it. Now below are the components I am planning to order, if you do have any suggestions, that would be appreciated. Please note there is no other restrictions on the type of components, power consumed or anything else.
Box: The dimensions I’m looking for is more or less Length: 200mm, Width: 150mm, Height: 150mm. Now I’m planning to buy a simple electronic metal enclosure that allows some air in, then I will need to cut the top of it to install a fan and some other holes to allow in the heating element, is there a better option than electronic metal enclosures?
MOSFET: Will be used as switch to turn on/off power supply to heating element and fan.
Heating Element & Fan: I am lost at choosing a heating element, I’d rather use 12V DC that doesn’t draw too much power, almost all options out there are 220V AC(UK) and there is a lot of them, I really don’t know what to choose. I haven’t looked at the fans yet but that’s probably going to be a 12V DC fan that I can change its speed.
Temp sensor: At the moment my choice is LM35 because I have one, other options are thermocouple or thermistor.
And of course some other basic stuff like resistors, diodes, capacitors and etc. Am I missing something ? anything needed for safety measurements ?