Lab 4 - Abstract

For this lab, we have a better hall effect sensor for the iTouch motor. Instead of about 20 quantized signal levels, we now have about 200 levels. We even enhanced the precision of the sensor by implementing the signal amplifier using an op amp chip. Using this improved signal, we were able to construct better virtual spring and virtual damper system. We also differentiated the location sensor value to get the velocity value. This velocity value gave us another way to construct the virtual damper system. Lastly, we connected the iTouch and Arduino with the computer via MIDI protocal to generate sound. We used PD (Pure Data) to synthesize the sound.