I am in the process of building a rpm counter that uses IR to count the amount of transitions a color coated wheel (attached to a motor) makes. It is pretty much my first real, "made up" project and I'm having trouble w/ displaying the counter's value on two LED displays. Could anyone tell (or show) me how to drive two LED displays. I have a 7 bit BCD counter (counts to 127). Once the two displays reach 99 I want the display to freeze and then I will reset it manually. Preferably the simplest cheapest IC/setup possible. Thanks,
mpuvdd
mpuvdd