# Arduino supply voltage **URL:** \ **Category:** Support\ **Created:** [3 February 2021 01:14 UTC](https://forum.core-electronics.com.au/t/arduino-supply-voltage/9324 "2021-02-03T01:14:16Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Paul152404](https://avatars.discourse-cdn.com/v4/letter/p/ecc23a/32.png) [@Paul152404](https://forum.core-electronics.com.au/u/Paul152404)\ **Post date:** [3 February 2021 01:14 UTC](https://forum.core-electronics.com.au/t/arduino-supply-voltage/9324/1 "2021-02-03T01:14:16Z")
Hi There, new to this. This is my first project i have built. Can I run Arduino UNO on 12v ? have been running on 9v battery but goes through batteries fast. I have 800CCA 12v car battery that i use to power motors and steppers. Can i use this to power UNO as well? ---
**Author:** ![Oliver](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/oliver/32/3315_2.png) [@Oliver](https://forum.core-electronics.com.au/u/Oliver)\ **Post date:** [3 February 2021 01:20 UTC](https://forum.core-electronics.com.au/t/arduino-supply-voltage/9324/2 "2021-02-03T01:20:53Z")
Hi Paul, Welcome to the forums 🙂 Short answer is yes - The Uno’s have an onboard voltage regulator that can accept anywhere from 7v-15v DC (20v max). To power an Uno from a volatge source more than 5v, you’ll need to connect via the 2.mm DC Barrell Jack connector, or the V\_in pin. ![image](https://canada1.discourse-cdn.com/flex028/uploads/core_electronics/original/2X/b/b31e7fc5974c9809df4afec02098a6b1d7193652.png) See here for more info: [https://store.arduino.cc/usa/arduino-uno-rev3](https://store.arduino.cc/usa/arduino-uno-rev3) You also might like to check out chapter 1.5 in our Arduino for Beginners Workshop: > **[Arduino Workshop for Beginners - Tutorial](https://core-electronics.com.au/tutorials/arduino-workshop-for-beginners.html)** > > Welcome to the Arduino Workshop, where you'll be able to follow our guided course which covers everything you'll need to know in order to create your own Arduino projects and become a leveled up maker. My name is Sam and along with being a maker... ---
**Author:** ![Paul152404](https://avatars.discourse-cdn.com/v4/letter/p/ecc23a/32.png) [@Paul152404](https://forum.core-electronics.com.au/u/Paul152404)\ **Post date:** [3 February 2021 01:50 UTC](https://forum.core-electronics.com.au/t/arduino-supply-voltage/9324/3 "2021-02-03T01:50:40Z")
Thanks Oliver, that will make things a lot easier đź‘Ť ---
**Author:** ![Bryce](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/bryce/32/3631_2.png) [@Bryce](https://forum.core-electronics.com.au/u/Bryce)\ **Post date:** [3 February 2021 02:10 UTC](https://forum.core-electronics.com.au/t/arduino-supply-voltage/9324/4 "2021-02-03T02:10:46Z")
Hey Paul, By the way, if you want to provide power from a source other than a battery so you don’t have to worry about them dying you can always use a power source that matches the voltage and power output for your board. Also, generally, the boards don’t draw too much power without excess peripherals, so if your board is heating up significantly then you may want to check the amount of current that it’s drawing to make sure there are no issues with it. > **[12V DC 5A Fixed 2.1mm Tip Switching Power Supply](https://core-electronics.com.au/12v-5a-switching-power-supply-45158.html)** > > The Mean Well GST60A12-P1M is a 12V DC 5A Switching Power Supply. Supplied with fixed 2.1mm DC jack. ---
**Author:** ![James46717](https://avatars.discourse-cdn.com/v4/letter/j/e5b9ba/32.png) [@James46717](https://forum.core-electronics.com.au/u/James46717)\ **Post date:** [4 February 2021 20:25 UTC](https://forum.core-electronics.com.au/t/arduino-supply-voltage/9324/5 "2021-02-04T20:25:58Z")
I use a 12V 1.5A plug pack that came with a old USB disk drive. Plugs neatly into the Arduino. Disk drive is no longer in use. The link by Bryce will give more than enough power for most projects. Cheers Jim ---
**Author:** ![brian86770](https://avatars.discourse-cdn.com/v4/letter/b/c5a1d2/32.png) [@brian86770](https://forum.core-electronics.com.au/u/brian86770)\ **Post date:** [5 February 2021 03:12 UTC](https://forum.core-electronics.com.au/t/arduino-supply-voltage/9324/6 "2021-02-05T03:12:31Z")
you can add buck regulators if you want multiple voltages from one supply…!!! just don’t exceed the total wattage from your supply output…!!! the one Bryce posted above has a 60 watt total wattage output… !! this is one of my supply units. > [@My power supply](https://forum.core-electronics.com.au/t/my-power-supply/9311): > > this is powered off two 20 Ah 12 volt AGM deep cycle battery’s in series.to form 26.8V volts at full charged battery power…it is a D.C adjustable regulator…multi tapped…so basically is all step down…or “buck” type system … it has an 6Amp 35 v linear supply feeding into an mmpt 60 Amp smart regulator so it is well maintained on the input regulation. the input terminals are at the center of the supply and can be powered by any supply that you may want to use 30 volt …