[Larry Bank]’s Arduino library to print text and graphics on BLE (Bluetooth Low Energy) thermal printers has some excellent features, and makes sending wireless print jobs to a number of comm… ...

Control everything with a DAC, and you have a programmable load controlled by an Arduino. With such a small form factor, getting rid of all that heat was bound to be a problem.

About a year after launching a 4.3″ x 4.3″ computer board with an Intel Celeron J4105 quad-core processor, support for Windows or Linux, and an Arduino-compatible ARM Cortex-M0+ co-processor ...