Diy termostat using acurator and relay?

[JeppeC]

Hello i have an upcoming projekt with a projektor in an insulated enclosure that has to be used in january for a month.
Ny plan is to make a mechanism that can open for Air intakte at the bottom and Air out at the top.. since its vinter Air Will circulate without a fan..
my question is if i Can use a termostat app to controll an accurator like this

Controlled with a relay somwhow to open and close according to a temp set point ?
Or i Will have to make manual rulles to achive ny request. Intended use case?

[csteele]

I think a Thermostat App is too much, since it deals with heat/cool and fan.

You're just taking a temp sensor and comparing a value to some limit you create. Above that, turn on the mechanism (via relay) and below that limit, turn off the mechanism. I'd seriously suggest you build in some hysteresis so that tiny changes in temp don't have the mechansim running all the time (open/close/open/close forever) by having a limit for turn on and at least a degree lower for shutting it.

[JeppeC]

That was also my first thought .. but then I was thinking if I could make it smarter so it didn’t always close fully and open all way.

Or I just manually try to find how long time the acurator need to turn on to open enough
It moves about 9 millimetre pr second.

I can remote monitoring and update values along the way.. I have 3 projectors to monitor

I can imagine that Fress air needed to keep the enclosure at 20 degrees is very different when it outside temp +3 than if it minus 20

Thanks

[JohnRob]

You might consider a small computer fan ( maybe a 30 mm X 30 mm fan). It will be easier to control as its ON/OFF. so a simple thermostat application might work.

The issue with any system is the large time lag. Perhaps using an approach similar to a house thermostat might work.

For example:
The fan will be turned on every 10 minutes. How long it stays on is a function of the temperature error in the box.