Harmonicade Is A High-Scoring MIDI Controller

When [KOOP Instruments] started learning the piano, he wasn’t prepared for the tedium of learning chords and their relationships on the standard keyboard layout. But instead of killing his desire to tickle the ivories, it inspired him to explore alternative layouts that are easier to play. He converted to Isomorphism, started building MIDI controllers, and hasn’t looked back.

The latest incantation is Harmonicade, a dual-decked number arranged Wicki-Hayden style. Both decks have 5½ octaves, are (electrically) identical, and run off a single Teensy 3.6. We admire [KOOP]’s use of DB25 connectors to wrangle the wiring between the decks and the Teensy — quite a neat solution. Almost as neat as his beautifully-commented code.

Although the button decks and control boxes are all printed and open source, they are designed to be easily made from acrylic or plywood instead. [KOOP] is going to keep iterating until he’s totally happy with the control locations and layout, and the ease of breakdown and reassembly. We’ve got a double shot of videos for you after the break — one of [KOOP] playing Harmonicade, and a longer one exploring and playing its precursor, the Melodicade.

Tired of conventional-looking MIDI controllers? We hear your bellows and offer this MIDI controller in a concertina.

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Printing From A Famicom Clone Computer

This is an 8-bit computer and Famicom clone that [133MHz] bought for $2. It plays Nintendo games and using an 80-in-1 cartridge it has a rudimentary operating system and set of applications. Seeing a standard DB25 port on the back [133MHz] wondered if he could make the system talk to a printer. His first step was to investigate the electronics inside to find that the connector has a couple of chips that map to the data bus of the CPU and use the same control lines as the cartridge. That means it can be setup to do just about anything in software. After a bit of coding he’s got it printing to a dot-matrix. See for yourself after the break.

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