Help with my brainstorm
I have an idea for a new gizmo that I'm trying to make a working model of. It will use a 12volt electric motor and want to spend as little as possible on it until I'm pretty sure it will work, so I'm going to scavenge for parts when I can. The most expensive parts that will go into it is the electric motor and the battery and I have a few questions:
1- Does an electric motor draw whatever power it needs or is the power forced into it?
2- If it draws what it needs, can I take a 12volt motor and use an 18v battery with it without problems? So if I scavenge an electric motor from a 12v battery powered drill can I run it with an 18v lithium battery?
3- What about the amps? If I use a 12v motor that normally runs off a 12v car battery, can I run it with an 18v lithium battery that has less amps?
4- Any other specs I need to focus on?
5- When I find the right electric motor, which I think will be a small 12v gearmotor, where should I go to find a low cost supplier?
I'll have more questions later but if you could help me with this I can get started. Thank you!