im new at coding pics, but i was wondering if someone could provide me with some help with coding a count down timer using a keypad to enter the time, then using 2 dual seven segment leds to display the count. i wanted to use one 16f84 for the keypad, then send that data to a second 16f84 that is connected to a 4 to 16 line decoder, however i am not sure about how to set up multiplexing or how to code the pic for the timer to work properly. any help would be appreciated