1. Computer Input Output
... off a highly-reflective mouse pad onto a sensor. The mouse pad had a grid of dark lines. Each time the mouse was moved, the beam of light was interrupted by the grid. Whenever the light was interrupted, the sensor sent a signal to the computer and the cursor moved a corresponding amount. The paddle control is the simplest of the analog input devices. Like all variable resistors, the paddle control varies its resistance, thereby changing the voltage of the input circuit in ... relation to the movement of the paddle's control knob. The track ball mechanically combines ... ...
- Word Count: 2738
- Approx Pages: 11
- Grade Level: High School