The Arduino, Bluetooth module (check your specs, some HC-05, and HC-06 may come on a breakout board expecting 5V), and USB Host shield all run off of 3.3V, but devices you want to plug into the ...

The other major limitation is the power supplies on the Arduino. They don't seem to work well much above 12 V. When I tried 15 V, the Arduino M0 tended to draw too much current and get kicked off the ...

For those written in the last week, our most popular stories on the site cover Arduino announcing a single-pair Ethernet adapter board for its Uno R4, warnings from the Electronica CEOs Forum, ...