This is my first time posting on the Arduino forums, and I haven't actually gotten an Arduino board yet, but I'm very excited to get into some home automation. My project idea is very grandiose, as I'm sure everybody's has been at some point, but I'm hoping it's not too daunting. I would like to put thermo-sensors in every room of my house, and use that data to control the heating/cooling to provide the most control and comfort as possible. To gain more control over the system I want to use motorized duct dampers to keep the air moving only to where it is needed. So that's the grand plan, but obviously the devil is in the details. Since this is such a large project, I may just keep every post in this thread, depending on the etiquette here. So the first task I want to tackle is making my own motorized duct dampers. These are my requirements for my motor -Able to turn to a specific location every time -Powered off brake (Holding brake) -Low power usage -Low maintenance
So after some searching it appears that either a servo motor or a stepper motor is my best bet. I really like stepper motors because they seem to be more maintenance free in that they don't have any brushes, the only problem I have with them is that they don't have any feedback loop. Server motors seem like an ideal fit, but I'm not sure of the longevity of those.
The next question would be the powered off brake. Would it be better to use an EM brake, or using a worm gear. I'm really liking the idea of using a worm gear since EM brakes can be pricey and the spring ones can be large.
With that said would it be best for me to try to create my own servo using a stepper motor with a feedback loop and a worm gear, or rig a worm gear into an existing servo motor. I know the gear ratios for a worm gear aren't ideal for most applications but speed is not really a concern with this project.
Thanks for all your ideas.