We love macropads as a result of they improve productiveness and so they’re nice initiatives for makers. On the productiveness aspect, macropads can enhance virtually any workflow by offering fast and quick access to shortcuts and macros. The optimum structure and performance depend upon the precise workflow, which is why makers like to construct macropads. If you wish to make a macropad, however don’t know the place to begin, it’s best to take a look at Salim Benbouziyane’s implausible Ocreeb MK2 modular system.
Ocreeb MK2 is a “modular macro keyboard system” consisting of a central base unit, which accommodates a handful of programmable keys, and a number of other totally different add-on modules to develop the potential. One module, for instance, has two analog sliders that will be good for left and proper audio channel faders. One other has a mixture lock dial, which would supply a enjoyable manner set quantity, to enter a password, or to “kind” some other arbitrary sequence of numbers.
This method has a wise grid structure and every module can occupy both a full sq. of that grid or a half-square. The bottom module makes use of a Seeed Studio XIAO RP2040 microcontroller growth board and communicates with the linked PC through USB. Every add-on module accommodates a extra primary ATtiny microcontroller to deal with that module’s personal capabilities, resembling detecting key presses and setting LEDs.
Benbouziyane needed to incorporate a communication protocol and a bodily connector system for this modular plan to work. For communication between modules, he took benefit of Adafruit’s seesawPeripheral library based mostly on the I2C protocol. That enables for growth and for {hardware} interrupts. Benbouziyane wished magnetic connectors for the modules, however the merchandise in the marketplace had been expensive and so he made his personal. These use customized PCBs, pogo pins, and magnets in 3D-printed shrouds to switch energy and information between modules.
Every module additionally has its personal customized PCB tailor-made to its perform, in addition to a customized 3D-printed enclosure and no matter else it wants (like key caps and knobs). To make these appear like actual client merchandise, Benbouziyane utilized resin 3D printing.
Sadly, Benbouziyane nonetheless has some kinks to work out earlier than Ocreeb MK2 is prepared for the plenty. There are points with the interrupt system that turn out to be noticeable when there are a number of modules current. However Benbouziyane ought to be capable to repair these issues in code, so the {hardware} will seemingly stay unchanged. If you happen to’re the courageous type, you may comply with Benbouziyane’s tutorial to construct your individual Ocreeb MK2 proper every now and then replace the code later as soon as he addresses the interrupt downside.
