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Good point about the 14V. However, the vast majority of the time the servo isn't going to be in use. So, the load will primarily just be the arduino which doesn't really pull much power (~45 mA per a quick google search). However, I will keep an eye on the regulator temp. I'd like to keep this as simple as I can. If it becomes an issue, I'll look into changing it.
I like the idea of closed loop control to create equilibrium. Perhaps that'll be stage 2 once I get it installed and working.
Ideally, I'd also like to come up with a way to close the grill block when the car is shut off. This would help retain some heat in the engine for a bit longer. If anyone has any ideas on that, I'm all ears. I'm not sure how much this would really be super useful though if it takes much more complication to implement.
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