7400 competition entry: DIY musical keyboard

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.

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    1. 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.

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