Recent content by dtrueb

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    Scoreboard Project

    Gorgon: Thanks for the tips and comments. I will get back to you after I get a chance to study your comments. thx D
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    Scoreboard Project

    Kris: Great response. Understand totally. Wonderful offer on your part. My understanding is... 1. The table lookup can easily be done by the PIC 2. Put in a BCD and receive out the proper 1s and 0s on the 13 output pins Rest of the design is un-effected by this component. I'm not the...
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    Scoreboard Project

    Kris: By the time I finished my last comment, you had already added another post. Thanks for that. Not following all you say about EEPROMs, but will attempt to educate myself further. So... EEPROMs are mostly serial, not parallel? I didn't know that. So what kind of memory chip do I need to...
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    Scoreboard Project

    Kris: Thanks too for your input. Like in my response to Harald, the 4511 could take care of 7 of the 13 segments and the other 6 could be encoded separately. I think what you are referring to in your comment is constructing a ROM using diodes. Similar to diagram 9-4 in my CMOS Cookbook...
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    Scoreboard Project

    Harald: Thanks for that reply. I had already thought about using the 4511 and then adding some other logic to decode the other 6 (13-7) outputs. Seemed however, maybe easier to encode the whole table into a single EEPROM (except for my lack of knowledge about how to do that). If anybody can...
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    Scoreboard Project

    I am working to restore to operation a 1950's vintage basketball scoreboard. The electro-mechanical system is totally shot and inoperative and will be replaced with something electronic ... CMOS counters, drivers, etc. There are 7 single digit displays as follows A. 8 minute count down timer...
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