The number Bit displays information that it receives from the Bits before it. It's a great way to measure the input from sensors or count things like the score in a game.
Count mode has 2 settings: up (from 00-99) and down (from 99-00). A step to the next number happens on input low-to-high transitions. The voltage on the output bitSnap is a filtered PWM value that is proportional to the number on display. For example if the displayed number is 50 then the output voltage is 50% of 5V or 2.5V.