The board is connected directly to the Light IO board via PL4.
This circuit is very simple. +5V is applied via PL4 pin 4 to the circuit, and 0V is connected to pin 1 of PL4. When power has been applied, which is controlled by the processor1 board, Infra-Red LEDs D1 and D2 will emit Infra-Red light. If you look at the board, these LEDs are the two clear ones. D3 and D4 are two photodiodes, which will detect infra-red. If the sensor board goes over a reflective surface, the infra-red transmitted by D1 and D2 will be reflected back to D3 and D4. This will cause D3 and D4 to conduct, and and cause pins 2 and 3 of PL4 to go low. If the sensor does not pass over a reflective surface, such as a black line, then no infra-red will be reflected back, and pins 2 and 3 of PL4 will remain high.
Resistor R1 limits the current passing through D1 and D2. R2 limits the current passing through D3, and similarly R3 for D4.
The diodes are paired up for left and right. This is so that the sensor will be able to detect the edges of a thick line. D3 and D4 are the two dark LEDs. The reason that they are dark is because the plastic encapsulation acts as an optical filter. The filter is tuned for infra-red, so that visible light will not affect the operation of the device.
Robotics is the branch of technology that deals with the design, construction, operation, structural disposition, manufacture and application of robots. Robotics is related to the sciences of electronics, engineering, mechanics mechatronics, and software
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Line Follower ROBOT Plermjai Inchuay, firstname.lastname@example.org Award winner from VingPeaw Competition 2543, the robot built with 2051, L293D, and four IR sensors. Simple circuit and platform, quick tracking and easy-understand program using C language. I designed my robot, which use ...
Robokit perception kit Robotic perception kit allows you to experience what it feels robot endowed with only an ultrasonic sonar and infrared sensor. Kit for robot perception of the world, created by Paul Granzhonom (Paul Granjon), includes goggles, a helmet ...
This article is a continuation of Arduino hardware part 1 that talks about Arduino Board, COMMUNICATION CABLE (Serial / USB), Arduino power supply, PC / LAPTOP +-USB Serial Adapter. In this section we will discuss more about Arduino Hardware : ...
Robotics Short Story
The word robotics was derived from the word robot, which was introduced to the public by Czech writer Karel Čapek in his play R.U.R. (Rossum's Universal Robots), which premiered in 1921.
According to the Oxford English Dictionary, the word robotics was first used in print by Isaac Asimov, in his science fiction short story "Liar!", published in May 1941 in Astounding Science Fiction. Asimov was unaware that he was coining the term; since the science and technology of electrical devices is electronics, he assumed robotics already referred to the science and technology of robots. In some of Asimov's other works, he states that the first use of the word robotics was in his short story Runaround (Astounding Science Fiction, March 1942). However, the word robotics appears in "Liar!"
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