I need to control a slow and silent motor. It doesn't have to be precisely at a specific speed, but approximately 1 rotation per minute. I can of course work with gears to slow the final rotation down. But the slower the motor itself, the easier the transmission to ~1rpm is.
The important thing however is, that it should be as silent as possible.
The motor itself doesn't need to be very powerful, but should be able to lift a weight that is about 100 gram.
Its for an art exhibition, that constantly moves a scroll of paper (like an endless scroll), and therefor would be good if its silent enough to not disturb.
Does anybody know, which kind of motor I should use for this and whether I should control it with an Arduino or just a constant power supply with resistors?
Thank you in advance
What you want is called a "timer motor" - for example:http://www.allelectronics.com/make-a-store/item/ACM-339/1-RPM-115-VAC-TIMING-MOTOR/1.html
Of course the above is surplus (which is why it's marked @ $4.50 USD), and is meant for a 120 VAC/60 Hz mains supply. These are typically used for controlling the timing cycles of electro-mechanical dishwasher, clothes washing machine, and clothes dryer controllers. I've also seen them used in certain old "flip-digit" clock radios (for the clock). They are very common, and should be fairly easy to obtain in the mains standard voltage/frequency of your country.
They are virtually silent, relatively powerful for their size, highly reliable, and fairly accurate (if that's needed). Just wire up a simple lamp cord to the leads, and plug it in. No need for an Arduino, no need for complex circuitry, no need for expensive solutions.