It is fast in the same sense as FastSup - you can make it quickly. And play at any speed. True, it is made on a powerful, expensive and rarely found Arduino-compatible Teensy 3.2 board, and the range is narrow. But this homemade, which was invented by the author of Instructables under the nickname msobolak, can be modified to eliminate both drawbacks.
The master is going to execute a board with LUT touch platforms, but does not own any of the programs designed specifically for this. But how the fish in the water navigates in Illustrator. In which he performs the drawing of the board:
The file does not attach, but it is not particularly needed: from further photos it will be clear which of the Teensy pins to connect to which touch pad. You can easily design the same board with sensors in any software convenient for you.
The master prints the design of the printed circuit board developed by him on a sheet of glossy paper from Make magazine, glued to a sheet of plain paper, on such a “sandwich”:
After printing and cutting to the size of the board (100x70 mm) it turns out like this (mirror image):
The msobolak board blank copper surface is cleaned with steel wool:
And at the same time degreases with isopropyl alcohol, like this:
Then he decides to transfer the image LUT without the letter U, that is, without an iron. Why is it applied to copper with nail polish remover, such as:
Quickly, until it has dried, it presses the printout with a toner to the copper, smoothes out so that there are no bubbles:
After ten minutes, all this turns out to be completely dry, it remains to wash off the paper with water, and here is the whole toner on the copper, here the image is no longer mirror:
Now it will etch with ferric chloride for about 30 minutes:
Done, ferric chloride is time for regeneration, if you can:
But the toner is still in place:
The master removes it with steel wool after preliminary washing, it turns out like this:
Solder Teensy:
It flashes (you need the Teensyduino patch and Serial + MIDI mode), checks (software that supports the MIDI keyboard can be anything):
Earned, you can use.