Secondly, it’s simpler: No USB-UART (which also means no USB programming), a different pin layout (Arduino shields likely won’t fit) and more I/Os than the ATmegas have. Sure, it’s not as ...

and the phone layout version that does pretty much all the same tricks. Isn’t it time for a full Arduino-compatible keyboard? [ELECTRONOOBS] thinks so. This 41-button Arduino keyboard PCB is a ...

Arduino isn't software - it's hardware ... Modelers have been using them for such layout jobs as detecting block occupancy, controlling signals, indexing turntables, playing sound effects ...