You can not use a voltage divider with resistors to power something. Sometimes there is a protection diode between the DC plug and Vin, so they are not exactly the same. And if you disconnect the 9V, it will switch automatically to the USB power without problem. When you power the DC plug with 9V, and connect the USB, the USB power is not used. I'm assuming that it's at least okay to use it to power sensors that require a V-supply, either 5V or 3.3V - and if one were so inclined, via voltage dividers, some other nominal value ? Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. The board can be supplied with power either from the DC power jack (7 - 12V), the USB connector (5V), or the VIN pin of the board (7-12V). **5V.**This pin outputs a regulated 5V from the regulator on the board. So, if i have a 9V battery connected to the DC jack, i can also get 9V coming out from the "V in" pin ? You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin. The input voltage to the Arduino board when it's using an external power source (as opposed to 5 volts from the USB connection or other regulated power source).
Arduino power supply download#
Just for a newbie's curiosity, what exactly goes on when, say a 9V battery is connected to the DC jack, and the USB connection is also being used to download code.
The power source is selected automatically.
The Arduino Uno can be powered via the USB connection or with an external power supply. Just wanted to make sure i've understood all of this completely properly.įrom the Power section on the product spec page ( )
0 kommentar(er)
