7 Segment Counter using IC 555 and IC 4026

日期 : Feb 2017 - May 2017

Digital counters are needed everywhere in this digital world, and 7 segment display is one the best component to display the numbers. Counters are needed in object/products counters, digital stopwatches, calculators, timers etc. To use the 7 segment with ease, there is a 7 segment driver IC which is IC CD4026, so we are building 7 segment counter circuit using 4026 IC. IC CD4026 4026 IC is a 4000 series IC. It is a CMOS seven-segment counter IC and can be operated at very low power. It is a decade counter, counts in decimal digits (0-9). It is used to display numbers on seven segment displays and it increment the number by one, when a clock pulse is applied to its PIN 1. Means more the clock pulse rate, faster the numbers change in 7 segment Display. Below is the pin diagram and pin description of 4026 IC: Seven Segment Display It consists 8 LEDs, each LED used to illuminate one segment/line of the unit and the 8thLED used to illuminate DOT in 7 segment display. We can refer each line/segment "a,b,c,d,e,f,g" and for dot character we will use "h". There are 10 pins, in which 8 pins are used to refer a,b,c,d,e,f,g and h/dp, the two middle pins are common anode/cathode of all he LEDs. IC 4026 is used to drive common cathode 7 segment display. In common cathode 7 segment display cathodes of all the LEDs are connected together, and all the positive terminals are left alone Components 555 timer IC 4026 IC Common cathode 7 segment display Two- push ON, push OFF button. Resistors – 10k (3), 100k Capacitor 1uF, 22uF Circuit is quite easy and self-explanatory, we have interfaced the 7 segment to the 4026 IC, PIN 4,5,14 are left open as we haven’t used them, PIN 15 used to Reset the counter with the help of a PUSH button Switch. PIN 2 is kept LOW to avoiding the freezing and PIN 13 is kept HIGH to enable the IC. Now, the another main component of this circuit, other than IC4026, is 555 timer IC. 555 timer is used here to provide the clock pul