7 SEG DISPLAY FULL
7 SEG DISPLAY PRO

This is a free software with NO WARRANTY. Interfacing PIC16F887 with common anode 7-segment display. Since the 4 digits are multiplexed we need to refresh the display very quickly (display one digit at a time, others are off), for that I used Timer0 module (8-bit timer) interrupt with 1:16 prescaler, this means Timer0 overflows every 2048 microseconds.

7 SEG DISPLAY FULL

if you need to integrate other type of display into your product, please see Full customization LED display.

7 SEG DISPLAY PRO

The following C code is for mikroC PRO for PIC compiler, it was tested with version 7.2.0. 7 segment Display show complete detail of arabic numerals and some capital / lowercase English letter. Interfacing PIC16F887 MCU with 7-segment display C code: In this project the PIC16F887 microcontroller runs with its internal oscillator 8 MHz, MCLR pin is configured as an input pin. The push button which is connected to PIC16F887 pin RB4 (#37) is used to increment the displayed number.ДЄ common anode 7-segment display is used in this example. The 4 transistors are used to supply the display LEDs with sufficient current because the PIC16F887 microcontroller may not be able to do that (maximum output current is 25 mA).Д®ach transistor emitter pin is connected to +5V and each transistor base is connected to the PIC16F887 through 4.7k resistor as follows:Дigit 1 (most left) transistor base is connected to PIC16F887 pin RB3 (#36)Дigit 2 transistor base is connected to PIC16F887 pin RB2 (#35)Дigit 3 transistor base is connected to PIC16F887 pin RB1 (#34)Дigit 4 (most right) transistor base is connected to PIC16F887 pin RB0 (#33)Д®ach 100 ohm resistor is used for limiting the current that passes through the segment LED. That means each transistor supplies one digit segments. In the circuit there are 4 transistors of the type PNP, the collector of each transistor is connected to common anode pin of 1 digit. Project circuit schematic diagram is shown below.ДЄll the grounded terminal are connected together. Interfacing PIC16F887 MCU with 7-segment display circuit: PIC16F887 microcontroller -> datasheet.So, for a 4-digit display weвЂ™ll have 7 pins of the 7 segments, 4 pins of the 4 digits (common terminals) and 1 pin for the decimal point (DP) which means a total of 12 pins. ThisВ technique minimizes number of pins used. In multi-digit 7-segment display (for example 4-digit) all pins of the same segment are connected together (segment A of digit 1 with segment A of digit 2 вЂ¦), and each digit has its common pin alone.

7 seg display