The 5.2V is safe for all 5V-powered electronics like Arduino, Raspberry Pi ... Full breakout for battery in, control pins and power out – 90%+ operating efficiency in most cases (see datasheet ...

9-volt battery. The Arduino itself is powered by ... and mount the breadboard over the open space adjacent to the Arduino. 5. Use (4) 4-40 x 5/16" pan head screws and plastic washers to mount ...

It only applies to certain microcontrollers, but he provides example Arduino code showing how handy this can be for battery-powered projects. The usual way to measure VCC is simple, but has ...