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# What is the maximum voltage permitted by an arduino? Answered

Hi guys, how are you all ? I trust Jesus the Almighty God to keep you all safe as He has done for me, Glory be to Him. I am working on a project using the arduino that requires the arduino to be able to move around but not always be connected to a computer. I want to put an external power source but I am not sure the maximum voltage the arduino can handle. Please assist me by telling me the maximum amount of voltage an arduino uno can handle. May God bless all of you.

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## 10 Replies

jfryar30272 (author)2017-12-29

Natively, the chip that is on most Arduino's can handle about 6V max, but are rated for 5V. Having said that, Arduino's have a built in voltage regulator that can handle about 12V.

Basic answer: Arduino's can handle 12V.

Quick grammar question: Did I use "Arduino's" properly? Is it with or without an apostrophe? If I didn't, let me know, as I need to learn.

seandogue (author)2017-12-18

Power: 12VDC

I/O: 5VDC

iceng (author)2017-12-16

Rhetorical, does God transcend time ?

Well the Arduino does Not, but it can permit up to 20VDC for a very short time which is determined by the type of voltage regulator on the PCB not melting solder.. That euphemism of melting solder is real because the regulator is just a smart resistor in series with the processor and works by wasting the excess voltage greater than the Vcc by turning it into heat..

As Watts = (Vin - Vcc) x Current

Example W=(20-5)x200ma=3watts

Example W=(9-5)x200ma=0.8watts

rickharris (author)2017-12-17

As far as GOD is concerned you must assume so - all knowing and omnipotent suggests any such a being designing a system would build in a back door so they can access all areas.

iceng (author)2017-12-17

Such a Being has no need for back doors.. He can gain access very much like the instruction BRANCH WHEN NEEDED !!

Downunder35m (author)2017-12-17

Take a well filtered 12V supply and you are good to go.
If battery opt for a deep cycle type.

Simple-Circuits (author)2017-12-16

Operating Voltage: 5V

Input Voltage (recommended): 7-12V

Input Voltage (limit): 6-20V

This is for the Arduino UNO

https://store.arduino.cc/usa/arduino-uno-rev3

steveastrouk (author)2017-12-17

Yes. you have to be caretul that external loads on the Arduino don't pull too much current, because the heatsinking of the regulator iis inadequate.

rickharris (author)2017-12-16

The arduino AFAIK has an on board 12 volt regulator so perhaps 12 volts input

The data sheet will tell you more than you want to know.

http://forum.arduino.cc/index.php?topic=16384.0

rickharris (author)2017-12-16

Should say 5 volt reg