Can you be more specific? If you are asking for help deciding on a digital logic project for a school project, you have several good choices: (simple) logic probe, flip-flop with LEDs, pulse generator, 555 timer circuits, (more complex) pic controller, PLC. Tell us more and we can help more.
i am working on random number generator circuit and actually i want to make a dice...i dont know how to generate a random ...but i do know that after generating i will show it by bcd decoder and than i will use seven segment to get the output..can you plea help me in this case that how can i generate a random number??
You can use a fast counter that runs while a button is pressed (to roll the dice). If the counter runs fast enough, human reaction time is slow enough so the result is random.
/mike
Be sure to have really good regulation on the power supply, since minor variation in current can favor some number over others. It won't be that obvious, unless you track the number over a lot of presses.