Power banks usually have one or more USB outputs that provide regulated 5V lines at different current ratings. Besides USB ports of computers, we can also use power banks, for example, as power sources for Arduino boards. For example, a USB host device can be a computer this means that the computer's USB port is the 5V power source of the Arduino board connected to it. Something important about the USB connection is the current rating of the USB host device. Micro USB connector of the Arduino Nano RP2040 board. ![]() However, 5V from the USB connector can also power external components through the 5V pin that can be found in Arduino boards. The USB connector provides a regulated 5V line to power the board's electronics. The most common and easiest way we can power an Arduino board is by using its onboard USB connector. This article will examine these alternatives more in-depth. *Powering your board via the 3V3/5V pins is not recommended, as it can damage your board's voltage regulator. Powering via the onboard battery connector (if available on the board) Powering via the onboard barrel jack connector (if available on the board) Powering AlternativesĪrduino boards have five options in which they can be powered: This article will describe the main characteristics and correct use of power pins and connectors of Arduino boards. One fundamental question that usually arises when using an Arduino board in real-life applications is what dedicated power connector or pin we should use. ![]() Arduino boards can be powered in several ways we can use dedicated connectors (USB ports, barrel jacks or battery connectors) or dedicated pins.
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