I am using the below voltage divider for voltage sensing. The supply is solar panel connected across the divider.Is it ok if i connect directly to arduino pin wont the current flowing trough the divider damage the arduino analog pin?
Have i to take some precautionary measures?
Other doubt i have is:
I want to power the arduino board externally:
here is the image of my arduino board below.
I know that i need to connect 5V at Vin pin and change the jumper position once i have programmed the arduino.
But can i connect Usb port to external 5V regulated supply?
or can i connect 12 V battery directly to the male slot(like adapter o/p) provided to the right of the board?
which one do i prefer.