Design construction and testing of an infra-red remode controller

Abstract

Infra-red remode controllers are widely used in every day life (eg. Television). The perpose of thiS project is to design, construct and test such a remode controller whiCh will probably used in controlling the gate of a garage. The main advantages of thiS construction against other infra-red remode controllers are: 1] The encoding of the signal (production of a burst) in the transaiter and decoding of the signal in the receiver, leads to high reliability of the system, and interference is impossible. Even somebody with the same transmitting device cannot interfere due to the dip-switches coabination(somebody with the same transaiter has only 1 out of 4096=122 POSSibility to interfere). 2] The diodes of the transmitter are not working constantly (drived by DC) but they are driven by a burst(AC). As a result of this, the aean value of the power that diodes can handle, increases making the distance of transimion to increase as well. This system could also be achieved by using LASER, ~TIAVIOLET, ULTRASONIC or MICROWAVE ratiations. Laser, ultraViolet and microwave are not used due to the difficulties iD constraction, and the damage that these ratiations can cause on human if these are used every day life Ultrasonic is not used because: a) It is very difficult to encode ultrasonic Signals b) Uitrasonic can be interfere by bats or special dog wistles Which radiate ultrasonic.