How an optical mouse works and Whats inside


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and optical mouse works in a completely different way it shines a bright light down onto your desk from an LED light emitting diode mounted on the bottom of the mouse the light bounces straight back up off the desk into a photocell photoelectric cell also mounted under the mouse a short distance from the LED the photo cell has a lens in front of it that magnifies the reflected light so the mouse can respond more precisely to your hand movement as you push the mouse around your desk the pattern of reflected light changes and the trip inside the mouse uses this to figure out how you're moving your hand the scroll wheel at the front of the mouse is mounted on a switch mechanism that detects both how much it's rotated and whether you suppress it it's functions like the central button of a conventional Mouse unlike the switch detects when you press the right mouse button there is an identical switch on the other side to detect the left mouse button and optical mouse is much more high-tech than a ball mouse where a ball mouse has quite a few moving part and optical mouse is almost entirely electronic it has almost no moving parts here the inside of the typical optical mouse and a few of the main components the most interesting bits are in the center where the LED light shines down under your desk and at the front where button presses are detected by switches and LED at the back generates red light and shines at horizontally from the back of the mouse droid the front from the left to the right of this photo of lossless light drive channels the light from the LED at an angle down onto the desk a light detector chip measures light reflected back up from the base converting the analog movement of your hand include digital signals that can be sent to your computer [Music] rotations of the scroll wheel can be detected in a variety of different ways some might use potentiometers broadening variable resistors similar to the volume control on a radio but able to turn around multiple times others use various kinds of rotary switches or optical rotary encoders to convert analog uyou movements to digital signals a micro switch detects when you press the right mouse button there is an identical switch on the other side to detect the left mouse button the USB cable connection carries digital information from the mouse through your computer thanks for watching and don't forget to subscribe my channel