7-segment displays comprise 8 LED elements – 7 linear segments that form numerals, plus a circular dot. Numbers 0-9 and some letters (A, C, D, E, F, H, L, O, P, U) are represented using combinations of the 7 lines. The dot creates decimals.
Each element connects to a dedicated pin, allowing individual control. Pins receive high or low signals to turn elements on/off based on the desired character.
7-segment displays come in common anode or common cathode configurations, impacting signal requirements. With common anode, segments are activated by a low signal. Common cathode uses high signals.
For more details on 7-segment displays, including interfacing and character mapping, please refer to the dedicated topic in the sensors and modules section. Proper understanding of the display type and driving signals is crucial for successful implementation in code.
Connection Diagram of 7-segment with ATmega16/32
7-segment Display Code for ATmega16/32
#define F_CPU 8000000UL
#define LED_Direction DDRA /* define LED Direction */
#define LED_PORT PORTA /* define LED port */
LED_Direction |= 0xff;/* define LED port direction is output */
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