Digital Seven Segment

The viewer is used seven segment common anode, the anode of the LED must be connected to VCC and in the writing program to turn the LEDs are logic 0. To turn on the 8x7 segment is used 2 pieces PORT, the PORT (8 bits) is used as the data led seven segment, and one another PORT (8 bits) is used as the digit seven segment of voters who will be lit. Composition data segment in seven segment viewer is shown the following picture:

 

Ignition-digit operating techniques of the driving circuit is a 8x7-segment display using the scanning method. This method works display data from the microcontroller ports on many-digit seven segment in turn. However, the use of high speed then it would seem as if simultaneously. So it will look something like writing.