Archive: 4 posts

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I have built a board to display score/money. It is essentially a decimal based string of individual digital displays that have increment and decrement inputs. They also have outputs for incrementing and decrementing the next higher digit when needed, so they can be chained together and controlled by one input pair (e.g. ones chain to tens, tens to hundreds, and so on). Now this works fine, and I think I can get it to work well enough for what I want. I've been thinking that since the display on the digits itself is set by a selector, I can input a digit directly to be displayed. I would much prefer to be able to just say "subtract 20", or "add 10" to the display and have it do that than have to activate 10 increment pulses to do the same thing. Does anyone know the logic to do this? I've also built the counter in binary if that is easier, but I've not yet figured out how to implement a decimal display for it. thanks

2011-01-22 06:33:00 Author: tdarb Posts: 689

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Why not try to add in separate counters attached to a switch or a button. And add those counters to the pre existing ones though a combiner switch? For example to add in a value of 10, make a button that has a counter of 1. Then attach the counter to the input of the primary counter for the second digit though a combiner node. Seems relatively possible but haven't tested. Why not add me and we can give this a go? I also have a mic btw. psn ID: SomethinAmazinn

2011-01-22 06:57:00 Author: Unknown User

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Well, I am trying to make it as non level specific as possible. As it is, I can use a counter, and a timer object along with a not gate, and make an input for any number I want. The counter is also scalable so I can use as many or as few digits in the display as I need. It's just a matter of chaining them together. I was hoping to be able to find a way to just do basic addition and subtraction without having to increment a digit one by one. You just made me realize something though. I need to move my combiner onto the output circuit so that I only need one input for the digits instead of one for up and one for down. Also, your counter idea is similar to the one I am using in my count buffer, but I hadn't thought of using a counter for each place. I'll have to use that. This thing is ugly right now. I still need to clean up the circuits, label everything, and document it with notes. I'd be glad for some input though. If you're around tomorrow, we can take a look at it and see if you have any ideas.

2011-01-22 07:25:00 Author: tdarb Posts: 689

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Yeah that sounds good to me. Looking forward to it.

2011-01-22 19:57:00 Author: Unknown User

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