user35489: I want to power up arduino through Vin port , what should be the input voltage ?

user30198: About 7.5V to 9V is best. A 9V battery is often not capable to supply enough current for an Arduino. Do you have a multimeter to measure the battery voltage drop when the Arduino is connected ?

35489: <p>I want to power up arduino through Vin port , what should be the input voltage ?</p>
 30198: <p>About 7.5V to 9V is best. A 9V battery is often not capable to supply enough current for an Arduino. Do you have a multimeter to measure the battery voltage drop when the Arduino is connected ?</p>
