Remember the following important points about what we learned in this chapter.

• Standalone devices operate from independent power sources
• Independent power sources can be in the form of batteries, wall AC to DC adapters and USB power hubs
• Remotely located devices may need to be powered from solar powered cells
• There are three ways to power the Arduino board from external sources; via USB, through the DC IN port, and by using the VIN pin
• 5-volt tolerant peripherals can be directly powered from the Arduino 5V power supply pin