RevisedRevised a small three digit ( LED Displays need to be 2" tall digits) countdown timer with buzzer when time hits 0. total cost of assembly with case to be under $20.

Design a small three digit (LED Displays need to be 2" tall digits) countdown timer with buzzer when time hits 0 a buzzer sounds. Also need 2 buttons 1 that if pushed and held will enter a mode to set the time or push and release to start the count down, the second button to choose the time for each digit, either rolling numbers and they select the number when it appears, or push the second button to get to the number they want, repeat for remaining to digits.. Total cost of assembly with case to be under $20. 2" LED displays at lcsc.com. Project needs to be completed in 5 days or sooner.