3 Ways to power an Arduino Board - Do you know them?
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- เผยแพร่เมื่อ 9 ก.ย. 2021
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ARDUINO POWER SECTION SCHEMATIC
In our discussion here, we are going to use an Arduino UNO as the base example - much of what we cover can be extended to other common Arduino boards, but in each case you’ll need to double check for your specific model.
We are going to use the Arduino UNO schematic to inform our discussion - we’ll be looking at the power section.
Arduino Power Section Schematic
It seems like a lot going on - to simplify this a bit further we’ll reduce it down to this block diagram.
arduino power options, USB, Vin, and DC jack with lines to circuit diagram
When you see “USB PORT”, just imagine that’s where you plug your USB cable in, for “DC JACK” - imagine that where you plug your DC Jack in. And for the “VIN PIN”, that just the hole marked Vin on the power rail of an Arduino Board.
On the right side we have the 5V and 3.3V pins. In between we have some components that I’ll explain shortly.
POWERING ARDUINO W/ THE DC JACK
Let’s start with powering an Arduino with the DC jack. Let’s say you hook up a wall wort power supply, or a battery pack to that DC jack - what happens? Per the diagram you can see it powers the 5V regulator on the board.
Schematic of powering arduino with DC jack
What’s so special about 5V? Well 5V is right in the range the microcontrollers on the Arduino board need in order to operate.
Minimum Input voltage Maximum Input voltage Maximum Output current
+5V regulator 6.2V 20V 1A
+3.3V regulator 3.58V 16V 150mA
The 5V regulator requires a min input voltage of 6.2 volts and can take a maximum input voltage of 20V - so the power supply you hook up to your DC jack needs to be in that range for voltage. The sweet spot is more like 7-12 volts, if your power supply is much higher than that, you’re wasting a lot of power on that 5V regulator in the form of heat dissipation.
The DC jack is 2.1mm center-positive plug. It important that the plug you use is center positive. But just in case you accidentally use a center negative plug and reverse the polarity - the circuit has a diode that protects against that.
Now, there’s a lot of details here I am going over rather quickly. We are developing an entire course on powering Arduino, and how to think about your current inventory - it’s currently in production - if you want to learn more about what we offer check out our courses page.
OK - one more thing about that 5V regulator, it can provide up to 1A of current.
CONTINUED…
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**About Us:**
This Arduino lesson was created by Programming Electronics Academy. We are an online education company who seeks to help people learn about electronics and programming through the ubiquitous Arduino development board.
**We have no affiliation whatsoever with Arduino LLC, other than we think they are cool.**
your info gave me peace😂😂😂...... this info cleared my many confusions, thank you
Glad it could help! Thanks for watching.
Amazing video. Well explained. Loved it.
Thanks for watching!
Yes, thank you. You just explained how power works on an Arduino board. I’ve been wondering about this for about three years.
Nice video, clarified many doubts
Thanks so much for watching!
Very helpful tutorial! Many thanks!
Glad it was helpful!
Excellent detailed information. Very useful video. Thank you
Glad it was helpful! Are there any specific Arduino topics you would like covered?
@@programmingelectronics I recently learned about the Vin pin to power Arduino from an external power source. while trying to design a self shut-off circuit using transistor latches. Any information about Arduino being able to put itself to sleep (internally or externally) in order to save power after it gets done with whatever its doing would be very useful.
Also, it would be great to know how to drive a brushless motor from say a VCR capstan motor or a hard drive brushless motor. These are always very high quality motors.
Or, how to use rotary encodes, optical encoders (with 4 pins or 6 pins) to record motor speed or location, or optical interrupters for stopping a moving motor when it gets to a certain location.
I have salvaged so many parts from discarded electronics in the last 2 years, that it would very useful to drive these (often) very high quality motors and sensors rather than throw them away.
It would also be such a valuable and great learning experience since these components are all part of products that people had paid good money to purchase.
Thank you again for your very comprehensive and extremely useful video. It's very well done! Keep it up.
Daniel
@@shvideo1 Thanks for these idea!!!
alright if I understood this video correctly, my circuit should not light on fire:)
That is correct Albert :)
These videos are done so well sometimes i wish i could subscribe again
Thanks a ton for watching!
Thank you for the information
Thanks a ton for watching!
Amazing!!! I loved it
Awesome! Thank you!!
Nice one. Useful video.
Thanks Richie!
Thanks, I’ve been using the 5v out as an in wrongly instead of Vin for years.
Well said! I like your style.
Thank V J!
Unless I'm mistaken, you can also provide power directly to the Arduino via the +5V pin (usually assumed as output +5V,) provided the source is regulated and protected such as from a reliable phone charger power bank or bench power supply. I did this on a Nano project where my only source was a Li-Ion BMS board (5V / 2A max). Keep in mind not to plug in any additional sources.
I am pretty sure you are correct Mike (at least as I understand it). Like you said, keyword there is *regulated* ... I'm told a lot of cheap wall worts can have some pretty big voltage spikes which could potentially cause damage to the board. Thanks for adding this!
Quick question, if I'm powering the arduino via the 5V pin, would I still be able to use it (the 5V pins) to power other components?
@@programmingelectronics I was waiting for that part of the discussion, but that would be 4 ways to power an Arduino. It's possible to power via the 5v pin, but with caveats, so it's basically "not recommended". I purchased a DIN rail mounted 5v power supply with plans to do this, but after researching it, I don't think I will be able to use it. I'll probably have to get a 7-12v supply and use the VIN pin.
@@benjaminyellin5095 yes you should be able to.
What is the max amperage of the poly fuse before it trips?
great video
I needed to use a regulated 5v external supply to power my project. That also meant that I didn't want USB power to be a problem when programming it, otherwise the two supplies would be clashing with each other. In that case, my only option was to power the Arduino directly from the 5v pin with my external supply (thereby bypassing the 5v regulator) and make a special programming cable with the 5v USB line severed.
Nice video, thanks :)
Glad you liked it! Thanks a ton for watching! If there are other kinds of videos you would like to see, just let us know.
I have one question about this. I used to feed 5V and Ground to the GPIO Pins and not to the VIN Pin. I also was connected via USB Cable to the PC. Does that mean the 5V Pin never received Power and I was powering the Arduino via USB? Also if I power the Arduino via USB do I still need to connect the ground wire to an external ground or is it grounded with the USB Cable?
@Programmimg Electronics Academy I was hoping this was going to answer my concern. I'm new to this stuff but in looking at the various adapter things that I can plug into the wall to power this, they have diffirent amperage ratings, from under 5 to 10 amps. Does it matter as far as using them to power to power the Arduino.
Nope, as long as the minimum is met.
Perfekt, thanks 👍🏼
Thanks! I hope it helped!
Another super useful video by PEA.
Agree!
Thanks Jim!
Thanks!
Very informative
Thanks! I hope it was helpful.
I have 2 different adapters, a 12W 1000mA and 45W 3000mA , each can produce 5V .
Which is the better one to use for an Ardurino project ?
Hi! I have a question, would an Arduino Uno work if I connect it to a Buck Converter which is connected to a motorcycle battery? I'm planning to use a motorcycle battery to power an Arduino.
I was hoping this was going to answer my concern. I'm new to this stuff but in looking at the various USB things that I can plug into the wall to power this, they have different amperage ratings, from under 1 to 2 amps. Does it matter as far as using them to power the Arduino?
Great question! For an Arduino UNO, as long as you are in the correct range for voltage on your power supply (7-12 volts), you'll be looking for a minimum amperage of around 1amp (1000mA), having more will not damage the board. What will damage the board is if you try to power a bunch of other stuff through the pins that exceed the amperage rating of the board.
@@programmingelectronics Thank you! I'm slowly coming to an understanding of this stuff.
My usb get heats up while connecting Uno board to computer
not sure if you are still replying but my question is-
my arduino nano works fine from usb with a phone charger brick 5v-2A now i want to use the same brick for a home automation project where the arduino will be turned on 24/7 and it will power on 1ldr and 1relay from the 5v pin of the nano, what am i dong wrong if any? is there any thing i should be aware of or will it work? like is there any chance that my board will be fried in 1week?
hi, can i power arduino via usb and external 5v connected to vin?
If the Vin pin is for supplying voltage why am I getting an output voltage reading on my DMM of 4.62 volts?
I need to power with coins batteries to Arduino driver board , I have 4 coins batteries connected in series , how i connect the Positive and negative cables on the Driver board ,, + on the VIN and - on the ground?
going by this explanation of plugging power packs or battery packs into the arduino, i unplugged the usb cable from my arduino, i then plugged a bought variable power pack into it, which starts at 9V, the arduino didn't even blink, didn't even show that it had power. I then unplugged the wall power jack and made up a 9V battery pack using 6 'AA' batteries (9.7V). i soldered the ends to a jack plug and plugged it in, i got nothing also. but as soon as i plugged the usb cable back in and attached it to a mobile battery charger pack, it works just fine. What am i doing wrong, please help me ??
You always should draw the possible current verses on supply leads to make it immediately clear.
I bought 5 NANOs from ebay I plugged in a 9VDC wall wart that I found out later turned out to be 13VDC the NANO regulators did not work I had 7.2 VDC at NANO 5V pins LEDs were super bright. NANO ran for 5 days at 7.2VDC and locked up Causing a mis read on a flow switch and burned up a $1K UV Algea Killer bulbs. Tough lesson to learn I can't trust stated specs on Wall warts or the NANO on board Voltage regulators. I reverted to 2.1 AMP 5VDC Apple power blocks and mini USB cords to power the remaining NANOs. I will Switch to a Genuine Arduino Uno for critical projects. Official Arduinos are getting expensive at $27 each but, they are cheaper than UV bulbs.
Reminds me of the Spider Man mini games
Is the instructional program self paced? If I get busy with work stuff my hobbies get put on a back burner.
Great question - yes, the program is all self paced.
@@programmingelectronics thanks for the feed back. signing up soon.
i powering on VIN 12v on arduino Nano and UNO, like running fine. but when i made a simple circuit with the Atmega328p chip, the 12v power on the VCC was instantly fried so i had to add LM7085. But the sketch program works on a 12v scale, if it's a 5v scale my program is just useless. Can you give an idea?
Depends on the circuit I suppose. The operating voltage on the Atmega328p is 2.7V to 5.5V - The Arduino has a voltage regulator to adjust to this.
what is the current rate we can apply at Vin? like I have 12v 10Amps SMPS Can I connect this to power my Arduino???
Sure, it will draw only what it needs.
yes, you can, it will draw the power that it needs but if you add a lot of things to your arduino and it needs to draw a lot of power it can damage it because i dont think the arduino can handle 10Amps
@@jesseycoolen4169 oh fine, Ok now I got why I burnt my Arduino 😂!! So Either I should connect arduino alone or the components connected along with arduino should draw within Arduino's operating current rate! Thank You so much ❤️
Hi! I am a student and i have no idea of any thing about arduino, but can i ask, i need it for school, when do we use a 9v battery on arduino?
When you have low power requirement and use the sleep mode.
@@TheUnofficialMaker oh okayy, thank youu
Thanks VJ!
Can we connect power bank to DC jack with some arrangements
only if above about 7v.
Thank you so much , I am working a servo motor and my power source is the VIN pin , and now I see the VIN pin has no diode if I am supplying Negative Voltage.
I think it is good because I am only using 9 volts battery.
My question is VIN pin are cable also in powering servo motor? It can provide also 1 amp power,? Or only the DC jack?
No the positive and negative wires to your servo go directly to your power supply and it needs to supply the recommended voltage for the servo , if that supply is over 5v you should use either V in or power jack to power the Arduino from the same power supply - There is a maximum supply voltage for these power inputs - typically 12v is recommended so if your servo is 24v you need to use a buck converter to drop the voltage to 12v max to feed the Arduino , the Arduino is used to supply the PWM pulses to the servo . Anytime you need to power anything from an Arduino pin- other than something like a led you need to look at using a transistor as the pins on an Arduino can only supply or sink a small amount of current - typically 40ma .
You need to be aware also that some boards are 5v logic - like an arduino uno , mega etc but others are 3.3v logic .
I initially thought it was going to talk about battery packs, solar panels or even a modded treadmill to power it.
Great recommendation - we'll kick those around as a future video ideas!
What happens if I apply more than 5V volts to 5V pin. Which components can be damage?
I think primarily the microcontroller can be damaged.
actually there are 4 ways, suppose you have a stable voltage of 5v you can connect it directly to the 5v pin of arduino
8:12 where that fuse is located on Arduino ?
Here is a picture of the location
forum.arduino.cc/t/which-component-it-is/521929
@Programming Electronics can 5 ampere can power the mg995
If you have a 5Amp power supply (assuming the voltage is in the appropriate operating range for this servo), yes, I believe that would be sufficient for many applications. When the torque gets high on a servo, it can really draw a lot of current, so it depends on how it is being used. Hope this helps some!
So if i want to power a motor with the Arduino, i need to use a transistor?
If you want to power a motor, you're best off using a separate power supply to drive the motor. Also, you might consider using a separate motor driver module that takes care of circuit for you.
Cool
Thanks for watching!
But my Arduino also works with 4.8v in vin pin 🤔
Is it ok to give arduino 5V 3A power to 5v pin?
Hi David, great question! I think you are asking if you can power an Arduino board via the 5V pin on the power rail with a 5V 3Amp power supply?
The answer is yes, however, it’s important that your 5v supply be well regulated. Also, I’m not sure it would be the “Recommended” method. Some of the cheaper wall wort power supplies can fluctuate drastically with power spikes which could potentially damage the Arduino board components. That being said, if it’s a good regulated supply, it very doable.
@@programmingelectronics yup, is it safety to run the arduino with 5V 3Amp power supply?
is there a risk of damaged arduino?
@@pokednaful If the power supply is not regulated, you can could damage the Arduino.
@@programmingelectronics but the power supply is already regulated to 5V
@@pokednaful If it's a well regulated supply you should be fine.
can i power my arduino uno r3 with 7.4V? its 2 (18650)
Yes, that should work Kali. Are you connecting your battery pack via the DC jack?
@@programmingelectronics Yes i am surely connecting it to the DC jack.
@@kali5495 Is it not powering on for you?
@@michaelcheich2481 it did power on
So you never actually plug it in? Great. I want to plug in the 9 volt and it doesn’t come with a jack right?
common grounds?
yes
I exploded my Arduino UNO by dc jack
Yikes! What kind of power supply did you hook up?
Only 9 more likes
Thanks Charlie!
you sound like bryan cranston
Hi, I was planning to use a power bank as a backup battery for an alarm system made with an arduino... I would just charge the powerbank with a phone charger and connect the powerbank to the arduino. Would it be a good idea to also connect a power supply to the dc jack?
Do you got your answer please answer the query if possible
@jesseycoolen4169
@@Gaurav_Guru yes, it's possible