7400 competition entry: Discrete Logic Drum machine

Posted on Friday, October 21st, 2011 in 7400 contest by DP

Matt built a fully featured Drum machine for the Open 7400 Logic Competition. Check out the video of its operation and his sound generating skills below.

This is a four-channel, sixteen-step percussion synthesizer/sequencer created entirely from discrete logic chips (mostly 74HC-series parts). That’s right, no microcontroller or software of any sort. It was created for the Dangerous Prototypes 7400 Contest in a little over one month of spare-time work.

Via the contact form.

This entry was posted on Friday, October 21st, 2011 at 5:00 pm and is filed under 7400 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.

7 Responses to “7400 competition entry: Discrete Logic Drum machine”

  1. Yeah! Full of win. I love it!

  2. Shaos says:

    This one is definitely a winner
    P.S. I want it! Do you plan to sell PCB or something?…

  3. gumi says:

    Amazing design. This one thumps all the contest criteria right on the head. I can see it really taking off in the DIY music community. Good luck!

  4. shoorick says:

    incredible device!

  5. benjamin says:

    This one is a winner!
    No doubt about that.
    Totally awesome.

  6. Dave says:

    This is fantastic. No doubt a contender for the overall top prize. The sound generation really demonstrates mastery of the 74xx series, and shows off the power of simple logic chips. Good luck! Definitely think about turning this into a kit!


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