I've got an iPod Touch and am trying to create an electrical circuit that, when turned on, will trigger the touch sensor in a specific spot (the spot that whatever component of the circuit provides capacitance is resting on, I guess).
For the life of me, I cannot figure out how to trigger a...
Just to let you know, nvn: as a test, we measured the amount of voltage required to make the wheels slip when starting from standstill and resolved your equation for mu. After plugging in the numbers, the result we got was almost exactly equal to the published coefficient of friction between our...
I've got a robot with four wheels, two of which are driven by 12V DC motors. I can vary the voltage sent the motors using a PWM speed controller. The coefficient of friction between the wheels and the surface is very low. My problem is: I need to limit the amount of voltage sent to the motors to...