Hello everyone: I'm not an electronic engineer, I wonder if someone can answer these 2 questions:
1. How can a DC motor (3.5 volt) be turned off when its turning is resisted. For example. Motor turns a cam, cam is blocked by an object, the motor can't turn. Is there a very simple way to detect the resistance and cut the power to the motor?
2. Motors often have very high RPM's. 9000.... 13000 - I want to use a cheap motor for a project, but, I would like to cut the RPM without gears. Can this be done by restricting the voltage? or, PWM? If PWM, whats the cheapest chips to use for PWM....
thanks / simon
1. How can a DC motor (3.5 volt) be turned off when its turning is resisted. For example. Motor turns a cam, cam is blocked by an object, the motor can't turn. Is there a very simple way to detect the resistance and cut the power to the motor?
2. Motors often have very high RPM's. 9000.... 13000 - I want to use a cheap motor for a project, but, I would like to cut the RPM without gears. Can this be done by restricting the voltage? or, PWM? If PWM, whats the cheapest chips to use for PWM....
thanks / simon