This is a good project for beginners. It is easy to build.This running LED light uses seven bicolor led’s red and yellow, they light up in a pattern that can be made within the program code.The program code is written in assembler. ATMELs AVR STUDIO is used to write the program.
The project uses the AT1200 but the AT2313 can also be used. As a clock source a 4Mhz ceramic resonator is used, this is cheaper than a crystal. The board has to be powered with 5V DC.
Because each I/O port of the AT2313 can draw 20mA current, each I/O port can drive a LED. The LED’s are connected to the port B and port D of the AT2313.
By connecting one end of the LED to port B and the other end of the LED the port D the polarity of the LED can be reversed. By putting a 1 on port B and a 0 on port D, the LED will go red. By putting a 0 on port B and a 1 on port D, the LED will go yellow. Now by writing sequently different bytes to the port B and port D, you can create different patterns in which the LED’s will light up.
For more detail: Running LED bicolor
About The Author
Ibrar Ayyub
I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough research and presenting information in a structured and logical format.
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