Hi!
Using the Arduino UNO, I want to power it from a battery, so I watched a tutorial and plugged in the 9V battery to the VIN pin and to ground.
The Arduino has a recommended input voltage of 7-12 V, as the documentation says. When I did this, the Arduino got much more hot than it is with 5V from a USB cable. It's not melting, and I can keep my finger on it without the need to remove my finger, but it's still hot.

1. What temperature is dangerous for the Arduino? (Maybe I'm overreacting on the heat)
2. How can I use a 9V powersource and get 5V to my components?
3. SHOULD I even use a 9V power supply?

Thanks!

 

Are you using the 3.5mm power connector?

 

Are you using the 3.5mm power connector?

no :0
I read you can just plug in a 9V in the Vin pin? :00

 

Is it the voltage regulator that is getting hot, or is something else getting, and if something else, what is getting hot?

Note: Check to see whether you power supply is connected in the correct polarity.

 

no :0
I read you can just plug in a 9V in the Vin pin? :00

no you cant.
the only reason its maybe surviving is the battery voltage breaking down.

 

no you cant.
the only reason its maybe surviving is the battery voltage breaking down.

What do you mean, should my Arduino be broken now?? <:0

 

Is it the voltage regulator that is getting hot, or is something else getting, and if something else, what is getting hot?

Note: Check to see whether you power supply is connected in the correct polarity.

Most of the heat is at the power connector, on the two cylinders.

 

If you are lucky, the maker of the board put in a rectifier to protect the circuit from the power supply being reversed and the power supply is driving the rectifier. Make sure your power supply voltage is the correct polarity.

 

well applying 9v to the jack is OK and a little heat is OK too.

Good question if it is broken. You should be able to find out yourself??

For the dummies: Download the Arduino IDE, load the blink LED sketch + flash it.

 

If you are lucky, the maker of the board put in a rectifier to protect the circuit from the power supply being reversed and the power supply is driving the rectifier. Make sure your power supply voltage is the correct polarity.

Yes it seems to have survived, everything works phuu....

Thanks for the help!