Block Diagram for Led Animation

Block Diagram

On the right of the diagram is the LED matrix which consists of seven rows of 64 LEDs. Each of the rows has a switch circuit, which supplies current from the power supply when activated. These row

switches are controlled by a set of seven latches which receive data from the data bus. An eighth latch is used to activate the piezoelectric sounder circuit. 

  

The columns also have switch circuits, these being designed to sink current to ground when activated. The column switches are also controlled by latches. Arrange in eight groups of eight. Each group can be written to from the data bus under the control of eight column group select lines which make up the select bus. Both the data and select busses are buffered before connection to the column latches. 

On the left side is the CPU circuitry. The clock circuit provides the master timing reference. While the reset circuit ensures that the CPU starts executing program instructions from the beginning when power is first applied. The EPROM and RAM are connected to the CPU via common address and data busses and are selected under the control of the memory address decoder circuit.

The I/O (lnput/Output) address decoder circuit uses control signals from the CPU to select the row latches. The column latches and the keyboard buffer. The keyboard buffer reads both the keypad and the DIL switches simultaneously. The data bus, select bus and the row latch signals are connected to the display section via a 20-r.r'ay ribbon cable. While a I/O-way rib-'on cable is used to connect the keypad to the keyboard buffer.

LED display signs can be programmed to have changing images or lettering, or animated graphic displays that keep alternating as different lights come on and off. Neon signs, while they can be made to show an animated design with different tubes switching on and off, have less overall versatility. LED display signs tend to be seen as modern, but often rather clinical and cold. Neon signs are perceived as warmer and more inviting, with a retro feel that often suits small businesses attracting individuals.

The smallest unit of the LED display screen that can be controlled and can be turned off or on at various brightness levels. The full name of pixel is “picture element”. In a 3 colour LED display, the pixel is made of 3 different colours – red, green and blue. Each part is made up by one LED or several LED’s, in theory that the different 3 colours can display every colour by adjusting the led brightness.  Therefore, pixels are points of light that illuminate together to form letters, words, graphics, animation and video images.