touch LEDs for Arduino
A cheap 4×4 Monome shield
Most of the projects published in Elektor simply provide a solution to a problem or fulfil a need. Even though their designers have often tried to propose an elegant circuit or design an attractive PCB, the aesthetic effect of the project itself, if there is one, usually takes second place. One exception is the Monome open source project, a USB luminous matrix keyboard that was designed to be good-looking. Here, it’s the application that seems to have been relegated to second place.
The aim of the project described here is to offer everyone the opportunity to produce their own Monome for a cost that is derisory compared with the price of a ‘real’ one. What’s more, our Monome can be used for any other purpose, since the software, like the hardware, is open and you can modify everything. The brightness of each LED is 12-bit adjustable, thanks to the LED driver, and we can dream up all manner of fine, luminous objects.
The Monome keys constructed using 10 mm LEDs and miniature push-buttons . The idea is to use the LEDs to press the push-buttons. The LEDs are large enough to hide the push-buttons, and seen from above, only the LEDs are visible. To obtain vertical-action keys, the LED leadouts have to be bent in such a way as to obtain a sort of ‘shock-absorber’. Then the push-button is slipped into the shock-absorber and the LED + button assembly is fitted to the board.
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