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CoffeeCaller nRF52840 Board Goes Open Hardware
The CoffeeCaller nRF52840 board is an open-hardware development platform built around Nordic Semiconductor’s nRF52840, with full KiCad design files, a CERN-OHL-S-2.0 license, and public Bridle support. What began as a quirky office gadget now looks more like a compact maker board with buttons, LEDs, a buzzer, an SHT40 sensor, servo headers, Qwiic, USB-C power, and enough exposed I/O to invite modification rather than just admiration.
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