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7400 competition entry: 1 bit microcontroller

Posted on Wednesday, October 31st, 2012 in 7400 contest, contest by DP

Check out Giuseppe’s Open 7400 competition entry. It’s a 1 bit microprocessor based on the MC14500 CMOS chip.

This circuit is based on the CMOS chip MC14500. This chip is an ICU (industrial control unit) built from Motorola few years ago, it is a 1 bit processor that can do some logical operations. This chip is now discontinued but can be found on ebay and other sites.
My circuit probably doesn’t have an application in real world, but can be useful for didactic purposes, to learn how a simple microprocessor works.

Build something that uses or abuses a logic chip and get amazing boards, tools, and other swag. The Open 7400 Logic Competition promotes awareness of the basic building blocks of modern circuits. Devious geeks ignited the computer revolution with discrete logic computers, what can you do? Details and entry form here.

Via the forum.

This entry was posted on Wednesday, October 31st, 2012 at 9:00 pm and is filed under 7400 contest, contest. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

4 Responses to “7400 competition entry: 1 bit microcontroller”

  1. AMS says:

    The greatest calculators ever (HP programmables) used a bit-serial processor that’s basically the same as this. (Same as the old big-iron)

  2. Frank says:

    So he uses a 14500 and a 4001. How does that fit into a 7400 (TTL!) competition?

  3. Jesus Echavarria says:

    Althroug is not a ‘pure’ 7400 design, I think it’s very helpfull to understand the microcontroller’s architecture

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