Go Down

Topic: Voltage regulator getting hot (Read 985 times) previous topic - next topic

Luigi_xp

Hello, i have an arduino uno. it works very well, but the voltage regulator on my was getting hot around 50 - 60 ÂșC. it was different from the one of website of arduino.

mine


retrolefty

How hot the on board regulators is a function of the following:

External voltage value, 7-12vdc. The closer to 7 volts the better for less heat dissapation.

How much external current any wired components are using of the board's +5vdc power.


Note that voltage regulators like this will automatically shut down if they get too hot or you draw more the it's rated maximum output current. So while hot is not good and should be avoided, it's not likely to damage the board.

Lefty




Luigi_xp

i use a 9vdc unregulated wall wart.
my worry is about damage the pcb itself. this is possible?

retrolefty


Nick Gammon

I think the unregulated ones can often deliver more than their ratings, particularly at the low current levels the Arduino draws. Try measuring it with a multimeter. Sounds like it might be putting out 12V. Try a regulated 9V supply.
Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

Go Up