Sequence adder

This circuit adds two digit . Give first digit by first four bits in upper 7 segment display and 2 digit by four bits at lowest last 7 segment display . Then starts play button and wait for some time . When upper display becomes zero see the result in lowest last diplay.. Initial value upper display =15(F) Loswest display = 9 So answere will be Upper display = 0 Lower display = 24 (If sum is more than 9 then the ten's digit of result in lowest first display and one's digit in lowest last diplay) (Dont give more than 9 in 2 diplay . I locked it so it will not work properly if 2 digit is more than 9) Max sum =>> 15+9=24

published 11 years ago