hi..i'm working with the counter project now..i'd like to design up/down counter circuit with number 0-99....the circuit must have up switch and down switch...
This part uses up/down decade counters.
ex: initial zero...push switch up...display '1'....and push again, displays '2' and continuous.....then whwn i push down switch....the counting should be decrease...say that i'm at 30 now..when i push it..the counting will be '29' and the process countinous....
This part would use ic's, like a 74LS47 decoder LED driver.
another switch is when we push it..the 7seg will display 'FL'.....
This is difficult, not many, decoder LED drivers will display values greater than '9'.[ eg: H E L P etc]
any circuit..??plz up if you have....also up the thread/link/website with the similar project..tq