arduino 5v to 12v


And to accomplish this we’re using an N Channel Mosfet.. Now, obviously, the Arduino cannot power the LED strip directly.. First of all, the Arduino can only put out a maximum of 5V. Secondly, it can only draw a small amount of power from each pin., So obviously it wouldn’t be enough to light up. This whole LED strip., Now I’m, going to keep this video quite basic, because there’s already quite a lot of videos and information out there about Mosfets and the Arduino. So I’m, really just keep it basic and let you set it up and get going in a couple Of minutes. And then, if you want to know more about it, you can always do more. Research.. Now an N channel Mosfet has 3 pins The Gate, The Drain and The Source., So it’s Gate Drain Source. Now Source is where our power’s going to come in, for instance, from our battery.. The drain is where it’s going to go out and the gate is how we’re going to control those pins. There basically connect it together.. So what do you need to do this? Well, you need your Arduino, obviously, which I’m just running from a USB powerpack.. You need your N Channel Mosfet., Pretty much. Anyone would do. Just check to make sure that it can handle the amount of amps you want to push through it and ideally go for the L series, which is ‘logic’, Which means that the gate can be driven from a low voltage.

For instance, the 5V of an Arduino. – You need your 12V LED strip.. You need your 12V power source. In my case I’m, using a 12V battery., and then you just need some wires to connect everything together.. Now you can do this on a breadboard but to keep things simple: I’m, not going to.. So the first thing you want to do is take your positive from the battery your 12V source, and you connect that to the positive of your LED strip.. The next thing you want to do is take your negative from your 12V power source and connect that to the gate drain source.. So this pin here, which is your source. Next, you want to connect your drain, which is the middle pin so that’s this one here …, but this tab here is also considered middle pin So I’m going to connect it there and you’ll take that over to your Led strip. Now you need to connect the ground of your Arduino to the ground of the battery so I’m. Just going to use this jumper cable to do that., You can see that the lights are flickering a little bit That’s, because the gate is actually picking up a little bit of charge, which is left inside … a static charge.. Once we connect it, we’ll be able to control that. So ground from the Arduino to ground of the battery. There. You go. And then I’ve already flashed the fade sketch onto here.

So you can see. Pin 13 is fading on and off I’m, not sure how easily you’d be able to see that so we’ll connect the jumper cable to pin 13 and we’ll connect that to the gate pin of the Mosfet, which is the one on the very left.. And now you can see that it’s making the 12V LED strip fade the same as pin 13 on here. And it’s, really that simple., So what’s actually happening here. Well, the negative from the battery comes through the source pin right here.. Then it drains out, through the drain, pin to the LED strip and basically we’re, connecting these two pins or opening them closing them by telling the gate ‘Hey open, close open, close …, ‘ and we’re creating the fade effect using standard PWM, So I’ll bring the camera Closer and give you a good look at what’s, actually going on here, So let’s take a closer look at what’s going on here.. You have the positive of the battery going through to the positive of the LED strip and you have the negative of the battery coming through to the source pin of the N Channel Mosfet and then it’s going out to the drain. Pin, which is the middle pin. Here and that’s going through to the LED strip.. So basically the negative is coming through here, going to the N Channel Mosfet and then going out the N Channel Mosfet. and we’re controlling when these two are connected or when it’s opened or closed by using this pin.

Here, which is the gate, pin and that’s connected to the Arduino via pin 13 here., and because we have the fade sketch on pin 13 when it fades, pin 13 it’s. Sending that signal to the Mosfet, which is then opening and closing this connection very fast and that’s creating the PWM fade right here., So you can consider it kind of like plumbing. When you tell this, pin to open it It’s going to let everything flow between these two pins and when you tell it to close, it stops it. And because it’s opening and closing it so fast, it’s, varying the amount of power that’s going through to the strip And it’s creating this nice PWM fade effect.. So I hope this video has helped. You understand how to use an N Channel. Mosfet. I’ve watched a lot of different videos, and I really found it quite confusing. It had so many wires going everywhere that I couldn’t easily understand it and I’m over simplifying things in this video, but it’s enough to actually get you up and running and then later on, you can find out enough ways. You can do things better. Now. An important thing to remember is to join the ground from your 12V power source to the ground of your Arduino.. If you don’t do that, you won’t be able to drive the Mosfet.. Now there is a difference between P Channel Mosfets and N Channel Mosfets and I’m not going to go into the difference, but basically a P Channel Mosfet is going to make your life hell and the N Channel Mosfet is going to make it super easy.

So unless you have a specific reason why you need to use the P Channel, Mosfet, don’t bother. So just remember Gate Drain Source.. Whenever you put a positive voltage on the gate, it’s going to make the drain and the source connect and the power will flow through.. So I hope you enjoyed this video.


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Mon Jul 26 16:33:28 +0000 2010

More Whotsit time. I need to power a 12V 0.3A motor, and it looks like the current Arduino Uno motor shield can only handle up to 5V. So, I need another power supply, like this guy has. Can anyone tell me what I need to search for on Amazon or Google to g

PIR and 12V LED



Originally posted 2018-01-07 20:17:38.

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Comment (26)

    1. Not when need low consumption in Arduino. Take my case, I am powering nano from sun(as a battery controller and house automatization), relay module uses 30mAh each, and my project without relay on consumes <20mah, its more than double with relay on. Another bad think with relay modules: if you activate all 8 you need external power source (30mAh x 8 = 240mAh , arduino can handle 200 plus other sensors and stuff ...hmm) .Sometimes mosfet is better

    2. @Alejandro did you eve read the IRF540N? What are you trying to power, an entire building? Holy shit that is a big mosfet. That can barely even be driven by the low voltage of arduino LOL

  1. Hey can I put 12v 10amp into the led strip? will it not destroy arduino and the load? I have lots of load and my current 12dc charger can only supply 0.5amps. Thanks man,

  2. Thanks, clearest tutorial online, and it works! But my N Channel MOSFET quickly overheats while idle (ie the gate is closed), so i think anyone reading this needs to order a ‘Logic’ N Channel MOSFET..

    1. Yes, always look the datasheet for the Threshold Voltage, that is when the MOSFET is fully turned on in the Saturation Region. Or you could simply make a proper voltage polarization circuit for the gate of the MOSFET with just a general purpose BJT transistor and some resistors.

  3. That’s a serious red bull habit you have there. I don’t see any wings mate!!!??? But thanks for vid, have liked it.

  4. Thanks my attraction to using a mosfet is that it’s smaller and more efficient than using a relay. I want to turn on and off a GPS. Does it matter if I connect positive in stead of negative via the source and drain? Can you give us a link to the “fade sketch”? Thanks again!


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