's Blackboard Is a Minimalist Capacitive Input Device Powered by a Raspberry Pi Pico

Featuring a flat black surface with 24 capacitive touch positions, plus a 3x3 LED matrix, this gadget is certainly stylish.

Mexican electronic music specialist has launched its inaugural product: the Blackboard, a 24-key capacitive input board powered by a Raspberry Pi Pico at the rear.

"[Blackboard is] the new HID [Human Interface Device] with fully customizable functions," the company claims of its eye-catching yet minimalist design. "You can use the 24 keys at the same time and nine LEDs."

While the front of the board is relatively bare, holding a 3x3 LED matrix to the upper-left and with 24 capacitive keys visible only as printing on the silkscreen layer, the rear shows off a three-chip solution: A pair of Microchip ATtiny microcontrollers handle 12 buttons each, while a Raspberry Pi Pico's RP2040 microcontroller is in charge of the nine LEDs and USB communication to a host device.

The design also leaves five general-purpose input/output (GPIO) pins free for additional hardware, while the Raspberry Pi Pico which powers the gadget can be reprogrammed for a range of tasks using languages including, but not limited to, C/C++, MicroPython, CircuitPython, and Arduino's Wiring.

The Blackboard is now up for sale on's Tindie store, priced at $90.

Gareth Halfacree
Freelance journalist, technical author, hacker, tinkerer, erstwhile sysadmin. For hire:
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