Hi i need to build a 4 bit binary counter that displays a decimal number on a single 7 segemnt display.I dont know anyhting about it right now.I mean i just came out of my DLD class with a piece of paper saying that i should submit the project by next wednesday.Now I need to build a counter that either increments or decrements a decimal number when i press a switch .i mean to say there should be a switch which when i press decrements the decimal number and another one that increments the decimal number.The numbers i need to display are from 0 to 9.so ill be using a single 7 segment dispaly .Now whats next??.I will be glad if you explain it in detail as the only limited knowledge i have about this topic is how to display a decimal number on a 7 segment display with the help of 7447 decoder and thats all.I have no knowledge about cloaks and other IC's that'l be used in this project so please please be explanatory and help me people.thank you