I am using two 4510 counters which I want to connect together so I can count from 0-99. I have connected carry of the right BCD to the clock of the left. However when carry is low, and I change the direction of the BCD, the left number jumps. Carry is low when the number is 0 when counting down and 9 when counting up. So if I have a number containing 0, e.g. 60, and I change the direction to count down, the number jumps. How can I stop the numbers jumping when changing the direction at 0 carry?
Thanks for the help. I can include a schematic.
Thanks for the help. I can include a schematic.