I want to build a musical instrument based on tunable vibrating motors. I have bought a couple of these from amazon:
http://www.amazon.com/gp/product/B00CFSYQCS/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
which I believe will change their RPM, and therefore frequency, by changing the voltage going to them.
Can someone recommend a very simple circuit, using a 9V battery or wall power supply, that would allow me to "tune" the frequency of this? I'm assuming involving a potentiometer and hopefully not a lot else!
Assuming I can get that to work, the idea is to have 8 or 12 of them running, all powered from the same power source, but each with a different voltage so I have a whole octave. But the first step is to make one or two tunable. Thanks for any advice!!
http://www.amazon.com/gp/product/B00CFSYQCS/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
which I believe will change their RPM, and therefore frequency, by changing the voltage going to them.
Can someone recommend a very simple circuit, using a 9V battery or wall power supply, that would allow me to "tune" the frequency of this? I'm assuming involving a potentiometer and hopefully not a lot else!
Assuming I can get that to work, the idea is to have 8 or 12 of them running, all powered from the same power source, but each with a different voltage so I have a whole octave. But the first step is to make one or two tunable. Thanks for any advice!!