Optical Mouse Electronics Seminar Topic Abstract

Every day of our computing life, we reach out for our mouse whenever we want to move our cursor or activate something. Our mouse senses our motion and our clicks and sends them to the computer so that it can respond appropriately.

It is amazing how simple and effective a mouse is, and it is also amazing how long it took Mice to become a part of everyday life. Given that people naturally point at things — usually before they speak — it is surprising that it took so long for a good pointing device to develop.

Although originally conceived in the 1960s, it took quite some time for mice to become main stream.

In the beginning there was no need to point because computers used crude interfaces like teletype machines or punch cards for data entry.

The early ex terminable did nothing more than emulate a teletype (using the screen to replace paper), so it was many years (well into the 1960s and early 1970s) before arrow keys were found on most terminals.

Full screen editors were the first things to take real advantage of the cursor keys, and they offered humans the first crude way to point.

An optical computer mouse or “optic mouse” uses a light-emitting diode and photo diodes to detect movement relative to a surface, unlike a mechanical mouse which has a ball which rotates orthogonal shafts which drive chopper wheels for distance measurement.

Refer to Optical Mouse Related Link:

Optical Mouse Seminar Report

The earliest optical mice detected movement on per-printed mouse pad surfaces, whereas the modern optical mouse works on most opaque surfaces; it is unable to detect movement on specular surfaces like glass.

Laser diodes are also used for better resolution and precision. Battery powered, wireless optical mice flash the LED intermittently to save power, and only glow steadily when movement is detected.

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