7400 competition entry: DIY musical keyboard

Posted on Friday, November 2nd, 2012 in 7400 contest, contest by DP

Oakkar7 shows you how to make an awesome DIY musical keyboard using only 7400 logic.

The idea is to design and construct an electronic musical keyboard with some functions, effects etc,. This is my old school project and I remake and modified it. It is fun.

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.

This entry was posted on Friday, November 2nd, 2012 at 7:00 am 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.

6 Responses to “7400 competition entry: DIY musical keyboard”

  1. Matseng says:

    Beautiful design.

    I read about it on your site and when I saw “The first circuit is 4060 tone generators.” I though – WTF! So many tone generators.. :-)

    • oakkar7 says:

      thanks for visiting :)
      yes, every musical instrument is basically tone generator. At least 12 tones generators are required for 12 pitches, C,C#…A#,B (ie: 12 freqs) for such devices.
      pros of 4060 are;
      – required only 12 x 4060 ckts for 84 keys. I only used 48 keys because I have only 48 salvaged keys.
      – easy to tune, I need to tune one tone for each octave
      If I use other oscillators (without uC), 48 tone generators will be required.
      I have to add more effects and control ckts soon.
      BTW, your Constant Load with Nixie Readouts is more awesome than mine.

  2. Dolabra says:

    one of the nicest builds of the ones I’ve seen posted.

  3. Raj says:

    Do you have any video showing this device in action?

  4. oakkar says:

    Hi Raj,

    Here is the device in action video link.

    thanks to all.

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