MOD-10 7 Segment Display

MOD-10 7 Segment Display

Introduction:

This project is a simple counter based on sequential circuit design that displays up to 10 digits counted from 0 to 9.  555 timer will be in astable mode and it will generate a clock pulse, which would be controlled by 100K potentiometer. This clock pulse will be as a  input to 74LS90 IC which is a decade 0-9 ripple counter. The 74LS90 IC is actually a MOD-10 decade counter that gives a BCD output code. For this circuit a 74LS47 IC is also important . which act as a decoder and convert BCD to 7-segment display. That 7-segment code is then used to glow the corresponding LEDs in the display so that the BCD number can be displayed in decimal form.

Circuit Diagram:

1

Components:

  • 74LS47 IC
  • 74LS90 IC
  • 7 Segment Display Common Anode
  • 555 Timer
  • 1mF & 2.2mF
  • 100k(potentiometer), 47k & 1k
  • 9V battery with clip
  • Connecting wires

2

3

Applications:

  • To display tokens in Banks and Hospitals
  • To count up to the limited numbers
  • In many digital devices even for indications using these counters.

 

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