Yup....just getting started in this mess. About 1000 hours living in VBA certainly helps for the thinking process....but is still a lot to take in. These videos are amazing.
Thank you I was struggling about how to make my electric little car, unfortunately my arduino broke before I realized of this video, now I know how to do it
Hi I was recently exposed to your channel and I really liked your videos you really explain everything the best way I have a question I came across a motor with three ports how am I supposed to use it and what does the third port mean thank you very much❤❤❤
Hi - we can't really tell without seeing the motor, you may be able to get an answer to your question on the official Arduino forums or another electronics forum on a site like Reddit or Stackexchange.
The Arduino's digital pins operate at 5V so the output will always be either 0V or 5V. The newer Arduino UNO R4 has a true analog output that can vary the output voltage.
i am making a motor system that is controlled uniquely by code and not involving buttons. ChatGPT is being quite unhelpful, so how would I get around to wiring this in the simplest way possible? Great video by the way!
In our button video, we use an external pull-down resistor to ground so the button is low when not pressed, and wire the other side of the button to 5V so it is high when pressed. This approach is a little more intuitive when first learning buttons (pressed = high/on, not pressed = low/off). However, the Arduino also has an internal *pull-up* resistor that you can set using INPUT_PULLUP as shown in the code. If you do this, then you only need to wire the button to ground externally and not 5V. It's a little less intuitive because the input will be high when *not* pressed and will go *low* when you press the button, but it requires fewer external parts and wires. Sorry for not explaining that clearly in the video!
Ty! but isn't much easier just to line the middle output of the potentiometer with the CC motor? u would be able to control the cc motor by regulating the batterie's tension you would have to connect the batteries on the Vin btw
Hi - the short answer to your question is "no, don't connect the motor directly to the potentiometer." The reason that doesn't work is a little more than we can explain in a TH-cam comment and requires understanding some introductory physics and circuits concepts like Ohm's Law.
Hai sir you video is extremely useful and very clear . The mode of presentation is also amazing. Sir let me know , which software you used to simulate the circuit. Is it free to access or not? Once again I am waiting for new informative videos, Thanku sir
The simulation software is called Tinkercad Circuits and we have a tutorial video about it here: th-cam.com/video/9RF_BZ1Cg4k/w-d-xo.htmlsi=Wy9w0gLgvEahz0VD
Thank you! Quick question though: how did you determine the potentiometer's range. Is that found in a data sheet by the provider or is it across all potentiometers that value?
The maximum resistance will be in the product name when you buy the part, sometimes just abbreviated for example as "10K potentiometer" which means 10 kilo-ohm potentiometer.
7:23 I use to think that the electricity flowed out of the positive terminal as well, but recently I learned that in a typical use case such as this, they flow out the negative and in the positive. Apparently the logic behind this was that the + side is "gaining" electrons and the - side is "losing" them. Very backwards from everything I learned playing with electronics as a kid, lol.
The convention was defined before scientists really knew about electrons as the mobile charge carriers - for better or worse, that's what we've stuck with!
Hi there, thanks a lot this is helpful for a project I am doing. I had a quick question, what components are you using in the real life circuit at the start, i.e. what are the power ratings of them so that I am able to purchase accordingly to produce a working circuit? Thank you!
Great video! One thing that I've been struggling to understand is the purpose of the "common ground". Why does this need to happen in these types of circuits?
It's a bit much for us to explain in a single TH-cam comment. The very short answer is that voltage is measured between two points, so all parts in the circuit need a "common" or reference level. Think of it like using sea level as a reference for "zero" elevation everywhere in the world. If you search TH-cam for videos about "what is ground in a circuit?" you will find some more detailed explanations.
@@Science.Buddies my problem with this has been that when you have an external power source, you need to connect it to a common ground (with the Arduino) when the external power source already has a potential difference between its poles. Ill have to keep building to understand why this connection needs to happen.
So this may be a long shot commenting on this video. But I was wondering if you need that transistor? Im trying to get my motor to spin but dont have transistors at my disposal. I need to use a button as well.
hi ! thanks this was so helpful, i am working on a artificial pancreas project and there i have a 12 volt pump to be controlled. do i have to use the diode there as well? is it necessary ?
Hi - the same concepts would apply to controlling a motor regardless of what programming language you're using. We don't have any of our own tutorials on assembly though!
create a flag that will hold the last value. By default it is 0 and when you press you assign it to 1. on second press you have you have to assign to 0 and vice versa. and use that variable to turn on and off the motor.
Why did that my transistor is low level trigger I do not get it. I followed every single instruction. It might be the wrong transistor, but you said any type of transistor Mine looks like an MOS like in the video it said TO 692. Could you please help
If you are new to Arduino, we recommend checking out the beginning of our Arduino tutorial playlist (linked in the description), which will show you how to use the delay command to turn things on or off for a certain amount of time.
These motors are internally geared: www.amazon.com/Dagu-HiTech-Ele-DG01D-W-Breadboard/dp/B01KHWFD16/ and are very popular for a variety of robotics projects like our jumping robot www.sciencebuddies.org/science-fair-projects/project-ideas/Robotics_p047/robotics/rubber-band-jumping-robot and our bluebot kit: www.homesciencetools.com/product/bluebot-4-in-1-educational-robotics-kit/. The type of motor shown in this video has a very high speed, so works well for projects like our artbot, junkbot, or brushbot: www.homesciencetools.com/product/bristlebot-robots-kit/, but the motors can't really drive wheels directly.
You could do this by detecting the button press (see video on buttons earlier in our tutorial series), turning the motor on, using a delay() command for a set amount of time, and then turning the motor off. The disadvantage here is that the code cannot do anything else while it is stuck in the delay() command. There are other ways to keep track of elapsed time on the Arduino, like the millis() command. We do not have a video on it but you can look it up on the Arduino website.
@@Science.Buddies In the video you mentioned that the motor would require more current than than the LED, so when you connected the transistor into the circuit does that mean the transistor automatically drew the correct amount of current for the motor? If so, can you adjust the amount of current the transistor draws for the motor?
The Arduino's I/O pins will not be able to provide enough current to drive the motor directly without a transistor or another part called an H-bridge or motor driver (we have tutorials for those if you search our channel).
No matter how often I watch your Tutorial, I just can‘t manage to shut the motor off. On PWM 255 it looks like it‘s at full speed. However, if I PWM 0, the Motor just keeps spinning slightly slower. What have I been missing? My setup is exactly the same, except that I‘m using an arduino r4 minima instead of a r3.
This code should work the same on an R4 as it does on an R3. There may be something wrong with your circuit or code but we can't say for sure without seeing them. If you are a K-12 student working on a school science project, you can ask for help in the Ask an Expert forums on our website, where we have volunteers to help answer questions: www.sciencebuddies.org/science-fair-projects/ask-an-expert-intro. Unfortunately we are a small organization and cannot provide support beyond that, but you could try asking for help in the official Arduino forums or other forums like Stackexchange or Reddit.
Thank you. Though if I may ask, is there any way to power the arduino with the same power supply without risk of short circuiting? I've made a similar configuration which works just fine but just like in the video, the arduino is still uses power from the USB.
I was thinking of connecting the Vin port to the positive rail that's connected to the power supply. Currently unsure as I am still new to arduinos and don't wanna break my components. Some answers would be helpful, cheers.
We have a new video that is all about different ways to power your Arduino project! th-cam.com/video/I7MrL5Q7zvY/w-d-xo.htmlsi=ONWYTIxMbwE16vR7. You will also find this official help page useful: docs.arduino.cc/learn/electronics/power-pins. But the short answer is yes, you can use a single power supply and connect it to both the Arduino's Vin pin and the motors to power everything at once. That way the power for the motors comes directly from the power supply and not through the Arduino. Here's an example of a project on our site that uses this configuration - an ROV powered by a single LiPo battery: www.sciencebuddies.org/science-fair-projects/project-ideas/Robotics_p052/robotics/arduino-underwater-ROV
Could you just put two transistors one for forward and one for reverse and put diodes in between so you don't put power through another transistor when not in use. But they are connected to the same motor they just output a different polarity.
You can build an H-bridge using discrete transistors yourself but it actually requires four transistors, not two. This allows you to reverse the direction of current through the motor. We don't have our own tutorial on it, but you can find example circuit diagrams online. It's easier to make a mistake when building a circuit with multiple transistors though, so at that point you might as well just use an H-bridge IC.
For some of our tutorials we have a Tinkercad Circuits link in the description - unfortunately we don't have one for this one, so you will need to pause the video to see the code and diagram.
Are there external power supplies that just connect to another 9v power cable? If you want to do a project that doesn't need to be portable and would be useless to have batteries on it seems like there should be a way to bypass the batteries.
This isnt a official answer pls do some research im not that smart but i think by creating four wires (2 positive 2 negative) and connecting the first pair cable to the Vin pin and one to the gnd DONT SWITCH THE POLARITY It will deef fry ur board, and the two other wire pairs to the breadboard buses AGAIN PLEAAASE DO SOME RESEARCH ABOUT THIS METHOD , it will prob work idk😅😊
This isn't really something we can troubleshoot in a TH-cam comment - we'd recommend checking out a forum dedicated to electronics (the official Arduino forum, Reddit, Stackexchange, etc) where you can post pictures of your circuit.
The process to connect a pump with an external power supply is the same as what is shown in this video around 5:50 to connect the motor with an external battery. In your case you would have an external 12V power supply instead of the 6V 4xAA battery pack, but the connections to the MOSFET and Arduino are the same.
We don't have a simple answer for this because it can depend on the motor and power supply you're using - you might want to do some more research on more electronics-specific forums for this one.
Hi - we have a microphone tutorial as part of our Arduino series (playlist linked in the description) but on its own that only works for basic loudness detection, not voice recognition. If you search our channel you will also find several videos about voice recognition.
I am trying to build an ardunio that can pull my curtains up/down. Is a DC motor enough and is it possible to control that thing via bluetooth/ an app?
Hi - we don't have our own video on it, but you should be able to find many tutorials out there on using Arduino with Bluetooth and controlling things with apps. DC motors come in many different sizes and whether one is "enough" will also depend on whether there is a mechanism, such as gears or pulleys, that create a trade-off between speed and torque. This topic is a little more advanced than what we cover in this video but again you should be able to find other TH-cam tutorials about it.
The program is called Tinkercad Circuits, available at www.tinkercad.com. We have a tutorial video about it here: th-cam.com/video/9RF_BZ1Cg4k/w-d-xo.htmlsi=2agLPUXS-H3lGFo1
What exactly do you mean by "sound module"? We have a tutorial about using a microphone here: th-cam.com/video/bMs5J4bJOD0/w-d-xo.htmlsi=DTllbdrN_A78mYcU
Depending on the motor, you may near a humming or whining noise when changing the speed with analogWrite. analogWrite does not allow you to adjust the frequency of the PWM signal, and different motors will respond differently to different frequencies.
The Arduino's I/O pins can only supply 20 milliamps each, which is enough to drive a small load like an LED, but not enough to drive a motor directly. The transistor acts as an electronic "control valve" that lets you control more current flowing from a power source like the Arduino's 5V pin for an external battery.
I am trying to build a system with a humidity sensor that will detect the low temperature and then activate the DC motor. Can I combine this project using the same arduino? Please help me.
Hi - yes, you can combine pretty much whatever sensors and motors you want with an Arduino, at least until you run out of pins. We do not have our own tutorials for temperature or humidity sensors yet, but you should be able to find plenty on TH-cam.
The very short answer is that technically it would work but 9V batteries are not a good choice for powering a motor. We have a more detailed video about powering your Arduino projects here: th-cam.com/video/I7MrL5Q7zvY/w-d-xo.htmlsi=FHJb_28Zbzr-_sZF
This doesn't make any sense, an ordinary mosfet has a minimum voltage threshold on the gate, which allows it to open, so lower voltage values from the potentiometer won't even open it, causing the motor to be left turned off, and high enough voltage values from the potentiometer will exceed the gate's threshold, causing it to open, causing the motor to run at full speed. A mosfet can be either open or closed, so the motor will either run at full speed or not run at all, so please explain what am I missing here
The voltage from the potentiometer is not going directly to the MOSFET's gate. It is going to an analog input pin on the Arduino, which is read with the analogRead command, and then converted to a pulse-width modulation value and sent to one of the Arduino's output pins using the analogWrite command. The trick is that the UNO R3 does not have a true analog output - it is a pulse-width modulation (PWM) signal that just alternates between high and low (fully on or fully off, as you noted). By adjusting the duty cycle (percentage of each period the signal is high) you can control the motor speed.
Hey, i've copied everything exactly from this project but when I use analogwrite in an attempt to control the speed of the motor, it's not working. I'm not using a potentiometer, but here's my code: const int MOTORPIN = 3; void setup() { // put your setup code here, to run once: pinMode(MOTORPIN, OUTPUT); analogWrite(MOTORPIN, 0); } void loop() { // put your main code here, to run repeatedly: analogWrite(MOTORPIN, 0); } I've ensured that pin 3 is indeed a PWM pin, and my circuit setup is exactly the same as yours, I've double and triple checked. What could be the problem? Thanks in advance!
Hi - since you have analogWrite(MOTORPIN,0), you are setting the speed to 0 and the motor will not spin. Does it spin if you change the 0 to a different number, between 0-255?
@@Science.Buddies sorry I should have clarified, when I set the speed to 0 with the analogWrite it still spins. It doesn't stop. No matter what number I put it spins at the same speed.
Ok - this could be a problem with your circuit and not your code. You could test with an LED instead of a motor to make sure the analogWrite function is working properly, since wiring an LED does not require a transistor and is less complicated than wiring a motor. We have videos earlier in our tutorial series about controlling LEDs.
We would recommend starting at the very beginning of our Arduino tutorial playlist instead of jumping right to this video, which is more advanced. You can find the entire playlist here: th-cam.com/play/PLlBVuTSjOrclb0iCMSRpS_H1lSrlSVeEm.html&si=Mk1cQfK7YIpuIpq0
You can do PID control with an Arduino but this requires a sensor to measure the motor's rotational speed, called an encoder, which is not included in this video. This setup is "open loop" meaning there is no feedback signal that you can use for control.
TY very much for the capacitor and diode demo. Yes, this is more EE, but much needed for those trying to make real world circuits.
The explanations are very clear and simple, which allows us to understand well what we are doing. Thank you very much for sharing these videos.
Yup....just getting started in this mess. About 1000 hours living in VBA certainly helps for the thinking process....but is still a lot to take in. These videos are amazing.
1
Thank you I was struggling about how to make my electric little car, unfortunately my arduino broke before I realized of this video, now I know how to do it
This is the best description of a mosfet I have heard! It makes so much more sense now.
Bro, Thank you very much! I was in troble traying make these circuit. I'm from Brazil and here, we don't have videos in this quality!
THANK YOU SO MUCH!!! SUCH AN AMAZING VIDEO, AND IT WORKS!!😀😀😃
I could listen to your lessons all day. i could listen to it for sleep aid too.
Super helpful, exactly the information I needed. Thanks
You teach perfectly. It's work successful. Lot of thanks.
This is a phenomenal video. So clear, thank you 🙏
The best explanation i have ever seen ❤
I love your lessons is simple and powerful
Brilliant! Well done mate 🙏🏻
Hi I was recently exposed to your channel and I really liked your videos you really explain everything the best way I have a question I came across a motor with three ports how am I supposed to use it and what does the third port mean thank you very much❤❤❤
Hi - we can't really tell without seeing the motor, you may be able to get an answer to your question on the official Arduino forums or another electronics forum on a site like Reddit or Stackexchange.
thanks so much this video help me so much😃
I'll subscribe. You made it clearer I'm just assuming how everything should work but it's dum risky.
So nice very usefull this videos
Ok vary the speed with PWM (to be adjusted for the motor you have to manage). But how to do to vary the 'amplitude?
The Arduino's digital pins operate at 5V so the output will always be either 0V or 5V. The newer Arduino UNO R4 has a true analog output that can vary the output voltage.
You change amps by changing resistance.
Great video man, I appreciate it!
i am making a motor system that is controlled uniquely by code and not involving buttons. ChatGPT is being quite unhelpful, so how would I get around to wiring this in the simplest way possible? Great video by the way!
We recommend asking your question in the official Arduino forums, we can't provide much help with code in TH-cam comments.
Why isn't the button being connected to the 5v of the arduino as shown in you button LED video? :(
In our button video, we use an external pull-down resistor to ground so the button is low when not pressed, and wire the other side of the button to 5V so it is high when pressed. This approach is a little more intuitive when first learning buttons (pressed = high/on, not pressed = low/off). However, the Arduino also has an internal *pull-up* resistor that you can set using INPUT_PULLUP as shown in the code. If you do this, then you only need to wire the button to ground externally and not 5V. It's a little less intuitive because the input will be high when *not* pressed and will go *low* when you press the button, but it requires fewer external parts and wires. Sorry for not explaining that clearly in the video!
Rating of npn mosfet and potentiometer
Which software is this is mechanical engineer can learn this for project's
Very good video, well explained and helpful.
Thanks btw, but I have a question, how do I make it stay but turns off because its timer automated like it doesnt need a button to turn it on
Ty! but isn't much easier just to line the middle output of the potentiometer with the CC motor? u would be able to control the cc motor by regulating the batterie's tension
you would have to connect the batteries on the Vin btw
Hi - the short answer to your question is "no, don't connect the motor directly to the potentiometer." The reason that doesn't work is a little more than we can explain in a TH-cam comment and requires understanding some introductory physics and circuits concepts like Ohm's Law.
Amazing way to explain
Hai sir you video is extremely useful and very clear . The mode of presentation is also amazing. Sir let me know , which software you used to simulate the circuit. Is it free to access or not? Once again I am waiting for new informative videos, Thanku sir
The simulation software is called Tinkercad Circuits and we have a tutorial video about it here: th-cam.com/video/9RF_BZ1Cg4k/w-d-xo.htmlsi=Wy9w0gLgvEahz0VD
can i use a BC 548B transistor?
and a 9v battery with resistors?
what is the voltage requirement of the motor to power in the diagram?
Thank you! Quick question though: how did you determine the potentiometer's range. Is that found in a data sheet by the provider or is it across all potentiometers that value?
The maximum resistance will be in the product name when you buy the part, sometimes just abbreviated for example as "10K potentiometer" which means 10 kilo-ohm potentiometer.
@Science.Buddies ahh ok I see. Thank you very much!
7:23 I use to think that the electricity flowed out of the positive terminal as well, but recently I learned that in a typical use case such as this, they flow out the negative and in the positive. Apparently the logic behind this was that the + side is "gaining" electrons and the - side is "losing" them.
Very backwards from everything I learned playing with electronics as a kid, lol.
The convention was defined before scientists really knew about electrons as the mobile charge carriers - for better or worse, that's what we've stuck with!
Hi there, thanks a lot this is helpful for a project I am doing. I had a quick question, what components are you using in the real life circuit at the start, i.e. what are the power ratings of them so that I am able to purchase accordingly to produce a working circuit?
Thank you!
Hi - these are common components available in many Arduino starter kits. We do not have exact links for the parts used in this video.
Great video!
One thing that I've been struggling to understand is the purpose of the "common ground". Why does this need to happen in these types of circuits?
It's a bit much for us to explain in a single TH-cam comment. The very short answer is that voltage is measured between two points, so all parts in the circuit need a "common" or reference level. Think of it like using sea level as a reference for "zero" elevation everywhere in the world. If you search TH-cam for videos about "what is ground in a circuit?" you will find some more detailed explanations.
@@Science.Buddies my problem with this has been that when you have an external power source, you need to connect it to a common ground (with the Arduino) when the external power source already has a potential difference between its poles. Ill have to keep building to understand why this connection needs to happen.
What software are you using to draw that circuit
It's called Tinkercad Circuits and we have a tutorial about it here: th-cam.com/video/9RF_BZ1Cg4k/w-d-xo.htmlsi=F5llF16hKmOuLTwD
So this may be a long shot commenting on this video. But I was wondering if you need that transistor? Im trying to get my motor to spin but dont have transistors at my disposal. I need to use a button as well.
The Arduino's I/O pins cannot provide enough current to drive a motor directly, so yes you need the transistor.
hi ! thanks this was so helpful, i am working on a artificial pancreas project and there i have a 12 volt pump to be controlled. do i have to use the diode there as well? is it necessary ?
A flyback diode is generally recommended when dealing with any DC motor or pump.
Thanks.
Hi, 1 question, with the switch why am I sending negative or, GND to the digital input pin and not positive?
Hello! Very good explanation, I just want to know if the exact same logic applies to a physical project programmed on assembly, thank you!
Hi - the same concepts would apply to controlling a motor regardless of what programming language you're using. We don't have any of our own tutorials on assembly though!
How would I change the code so that on a single press of the button the motor constantly spins until the button is pushed again?
create a flag that will hold the last value. By default it is 0 and when you press you assign it to 1. on second press you have you have to assign to 0 and vice versa. and use that variable to turn on and off the motor.
Is the transistor necessary?
Yes, the Arduino's digital pins cannot provide enough current to drive a motor directly.
Here is his LED button code:
const int LEDpin = 9;
const int butpin = 2;
int state;
void setup() {
pinMode(LEDpin, OUTPUT);
pinMode(butpin, INPUT_PULLUP);
}
void loop() {
state = digitalRead(butpin);
if(state == HIGH)
{
digitalWrite(LEDpin, LOW);
}
else
{
digitalWrite(LEDpin, HIGH);
}
}
Why did that my transistor is low level trigger I do not get it. I followed every single instruction. It might be the wrong transistor, but you said any type of transistor Mine looks like an MOS like in the video it said TO 692. Could you please help
You need to look up the pinout diagram for your transistor, not all transistors have the same pin locations.
@@Science.Buddiesok
How do I code it for a time component? Like say, I want it to spin for 30 seconds after I press the button one time and then stop after 30 seconds?
If you are new to Arduino, we recommend checking out the beginning of our Arduino tutorial playlist (linked in the description), which will show you how to use the delay command to turn things on or off for a certain amount of time.
Can I use a 9 volt external battery source instead of the 6 volt one in the video?
It depends on the voltage rating of your motor. 9V batteries will also drain rather quickly when powering motors.
@@Science.Buddies ok thanks
Question! What kind of DC motor do you recommend for more hard / motor heavy projects
These motors are internally geared: www.amazon.com/Dagu-HiTech-Ele-DG01D-W-Breadboard/dp/B01KHWFD16/ and are very popular for a variety of robotics projects like our jumping robot www.sciencebuddies.org/science-fair-projects/project-ideas/Robotics_p047/robotics/rubber-band-jumping-robot and our bluebot kit: www.homesciencetools.com/product/bluebot-4-in-1-educational-robotics-kit/. The type of motor shown in this video has a very high speed, so works well for projects like our artbot, junkbot, or brushbot: www.homesciencetools.com/product/bristlebot-robots-kit/, but the motors can't really drive wheels directly.
Sir. How about pressing a button to start the motor for a period of time rather than using a potentiometer?
You could do this by detecting the button press (see video on buttons earlier in our tutorial series), turning the motor on, using a delay() command for a set amount of time, and then turning the motor off. The disadvantage here is that the code cannot do anything else while it is stuck in the delay() command. There are other ways to keep track of elapsed time on the Arduino, like the millis() command. We do not have a video on it but you can look it up on the Arduino website.
Thank you so much
Can you connect multiple motors to one Arduino?
Yes, as long as you are using an external power supply to power the motors.
how do we know how much current the transistor is controlling and allowing into the motor?
You can connect a multimeter in series with the motor to measure the current: th-cam.com/video/ts0EVc9vXcs/w-d-xo.htmlsi=RWhOz3Z-QDKvApzs
@@Science.Buddies In the video you mentioned that the motor would require more current than than the LED, so when you connected the transistor into the circuit does that mean the transistor automatically drew the correct amount of current for the motor? If so, can you adjust the amount of current the transistor draws for the motor?
Hi - this is a little more than we can explain in a TH-cam comment, you might want to look up some intro electrical engineering tutorial series.
I don't have the transistor, is there anyway to do it without it?
The Arduino's I/O pins will not be able to provide enough current to drive the motor directly without a transistor or another part called an H-bridge or motor driver (we have tutorials for those if you search our channel).
@@Science.Buddies Alright thanks :D
i wanted to do this but i dont have any n-channel mosfet and h-bridge integrated, where did you buy those/ where do you think i could buy cheap ones?
These parts are available on Amazon and electronics vendors like SparkFun, Adafruit, Digikey, Jameco, Mouser, etc.
No matter how often I watch your Tutorial, I just can‘t manage to shut the motor off.
On PWM 255 it looks like it‘s at full speed. However, if I PWM 0, the Motor just keeps spinning slightly slower.
What have I been missing? My setup is exactly the same, except that I‘m using an arduino r4 minima instead of a r3.
This code should work the same on an R4 as it does on an R3. There may be something wrong with your circuit or code but we can't say for sure without seeing them. If you are a K-12 student working on a school science project, you can ask for help in the Ask an Expert forums on our website, where we have volunteers to help answer questions: www.sciencebuddies.org/science-fair-projects/ask-an-expert-intro. Unfortunately we are a small organization and cannot provide support beyond that, but you could try asking for help in the official Arduino forums or other forums like Stackexchange or Reddit.
Hello,
Could you please tell the name of the software you are using to simulate this circuit ?
Thank you
It's called Tinkercad Circuits and we have a tutorial about it here! th-cam.com/video/9RF_BZ1Cg4k/w-d-xo.htmlsi=VHRhSg4prsutotVv
Thank you. Though if I may ask, is there any way to power the arduino with the same power supply without risk of short circuiting? I've made a similar configuration which works just fine but just like in the video, the arduino is still uses power from the USB.
I was thinking of connecting the Vin port to the positive rail that's connected to the power supply. Currently unsure as I am still new to arduinos and don't wanna break my components. Some answers would be helpful, cheers.
We have a new video that is all about different ways to power your Arduino project! th-cam.com/video/I7MrL5Q7zvY/w-d-xo.htmlsi=ONWYTIxMbwE16vR7. You will also find this official help page useful: docs.arduino.cc/learn/electronics/power-pins. But the short answer is yes, you can use a single power supply and connect it to both the Arduino's Vin pin and the motors to power everything at once. That way the power for the motors comes directly from the power supply and not through the Arduino. Here's an example of a project on our site that uses this configuration - an ROV powered by a single LiPo battery: www.sciencebuddies.org/science-fair-projects/project-ideas/Robotics_p052/robotics/arduino-underwater-ROV
Do i need to place 10k Resistor between Gate and Ground and 220Ohm Resistor between Gate and Arduino Pin?
Yes or MOSFET will stay on
which SOFTWARE is being used in this tutorial to simulate
The software is called Tinkercad, we have a tutorial about it here: th-cam.com/video/9RF_BZ1Cg4k/w-d-xo.htmlsi=LwDVK2XtAwbA-SlM
Could you just put two transistors one for forward and one for reverse and put diodes in between so you don't put power through another transistor when not in use. But they are connected to the same motor they just output a different polarity.
You can build an H-bridge using discrete transistors yourself but it actually requires four transistors, not two. This allows you to reverse the direction of current through the motor. We don't have our own tutorial on it, but you can find example circuit diagrams online. It's easier to make a mistake when building a circuit with multiple transistors though, so at that point you might as well just use an H-bridge IC.
Where can i get the code and circuit diagram?
For some of our tutorials we have a Tinkercad Circuits link in the description - unfortunately we don't have one for this one, so you will need to pause the video to see the code and diagram.
Are there external power supplies that just connect to another 9v power cable? If you want to do a project that doesn't need to be portable and would be useless to have batteries on it seems like there should be a way to bypass the batteries.
Check out this video that is all about powering Arduino projects, it may help: th-cam.com/video/I7MrL5Q7zvY/w-d-xo.htmlsi=3vHons6WmIVFZP39
Newbie here: can you have the battery pack also power the Arduino so that nothing needs to be plugged in?
This isnt a official answer pls do some research im not that smart but i think by creating four wires (2 positive 2 negative) and connecting the first pair cable to the Vin pin and one to the gnd DONT SWITCH THE POLARITY It will deef fry ur board, and the two other wire pairs to the breadboard buses AGAIN PLEAAASE DO SOME RESEARCH ABOUT THIS METHOD , it will prob work idk😅😊
Any idea why my digital pwm pins seem to be getting shorted out with too much current via this configuration?
This isn't really something we can troubleshoot in a TH-cam comment - we'd recommend checking out a forum dedicated to electronics (the official Arduino forum, Reddit, Stackexchange, etc) where you can post pictures of your circuit.
Can you provide us with a diagram for an artificial pancreas thats using a 12v pump so it needs an external battery?
The process to connect a pump with an external power supply is the same as what is shown in this video around 5:50 to connect the motor with an external battery. In your case you would have an external 12V power supply instead of the 6V 4xAA battery pack, but the connections to the MOSFET and Arduino are the same.
How did the MOSFET not lower down the voltage since Arduino's digital pin can only provide 2.5V which doesn't fully open the MOSFET
Arduino digital pins can provide 5V which is enough to turn the MOSFET fully on.
@@Science.Buddies I tried with real life projects and Tinkercad and it did measure 2.5V 🤷
Will it work with 2 other trigger button & 2 dc motor?????
Yes - the Arduino UNO has 13 I/O pins, so you have plenty of room to add more buttons and motors.
Thx, I can modify my big mouth billy bass Fish
Nice video! How can I choose the size of the capacitor?
We don't have a simple answer for this because it can depend on the motor and power supply you're using - you might want to do some more research on more electronics-specific forums for this one.
How can I use a microphone instead of a button to control the motor with the voice?
Hi - we have a microphone tutorial as part of our Arduino series (playlist linked in the description) but on its own that only works for basic loudness detection, not voice recognition. If you search our channel you will also find several videos about voice recognition.
Hello, how make a dc motor position with potenciometer?
Use a proportional control (P control) circuit to do that.
Which MOSFET are you using?
It is a generic N channel MOSFET such as www.amazon.com/gp/product/B07CTF1JVD
what is this software to draw?
The software is called Tinkercad Circuits and we have a tutorial about it here! th-cam.com/video/9RF_BZ1Cg4k/w-d-xo.htmlsi=jFo8k2vp6V7eUPOU
thanks
Please help me to replace the button with ultrasonic sensor
We have a separate video in our Arduino tutorial series (linked in the description) about using an ultrasonic sensor.
I am trying to build an ardunio that can pull my curtains up/down. Is a DC motor enough and is it possible to control that thing via bluetooth/ an app?
Hi - we don't have our own video on it, but you should be able to find many tutorials out there on using Arduino with Bluetooth and controlling things with apps. DC motors come in many different sizes and whether one is "enough" will also depend on whether there is a mechanism, such as gears or pulleys, that create a trade-off between speed and torque. This topic is a little more advanced than what we cover in this video but again you should be able to find other TH-cam tutorials about it.
What's the software program you used??
The program is called Tinkercad Circuits, available at www.tinkercad.com. We have a tutorial video about it here: th-cam.com/video/9RF_BZ1Cg4k/w-d-xo.htmlsi=2agLPUXS-H3lGFo1
What is the name of the software
The simulation software we use in this video is called Tinkercad Circuits: th-cam.com/video/9RF_BZ1Cg4k/w-d-xo.htmlsi=anM2bLtx0hgG71lF
Bro what is the model number of that mosfet
www.amazon.com/gp/product/B07CTF1JVD/
I need to learn how to connect a sound module to a dc motor.
What exactly do you mean by "sound module"? We have a tutorial about using a microphone here: th-cam.com/video/bMs5J4bJOD0/w-d-xo.htmlsi=DTllbdrN_A78mYcU
@@Science.Buddies I need the motor running and the sound module playing music at the same time
why would my motor be humming/whining I used a similar setup using a IRF520 MOSFET, a potentiometer, and a 9V battery as the motor's power source
Depending on the motor, you may near a humming or whining noise when changing the speed with analogWrite. analogWrite does not allow you to adjust the frequency of the PWM signal, and different motors will respond differently to different frequencies.
Why we meed transistors. Can we avoid
The Arduino's I/O pins can only supply 20 milliamps each, which is enough to drive a small load like an LED, but not enough to drive a motor directly. The transistor acts as an electronic "control valve" that lets you control more current flowing from a power source like the Arduino's 5V pin for an external battery.
what app you use ?
Tinkercad
th-cam.com/video/9RF_BZ1Cg4k/w-d-xo.html
Tinkercad
I am trying to build a system with a humidity sensor that will detect the low temperature and then activate the DC motor. Can I combine this project using the same arduino?
Please help me.
Hi - yes, you can combine pretty much whatever sensors and motors you want with an Arduino, at least until you run out of pins. We do not have our own tutorials for temperature or humidity sensors yet, but you should be able to find plenty on TH-cam.
how can i connect TWO dc motors with arduino?
You just need to duplicate the setup shown in this video using an additional pin.
Thank you for helping me in theis journey was i was able yto do this and not commit suicide, LOLZ
would it work with a 9.V battery (I'm very new to everything)
The very short answer is that technically it would work but 9V batteries are not a good choice for powering a motor. We have a more detailed video about powering your Arduino projects here: th-cam.com/video/I7MrL5Q7zvY/w-d-xo.htmlsi=FHJb_28Zbzr-_sZF
This doesn't make any sense, an ordinary mosfet has a minimum voltage threshold on the gate, which allows it to open, so lower voltage values from the potentiometer won't even open it, causing the motor to be left turned off, and high enough voltage values from the potentiometer will exceed the gate's threshold, causing it to open, causing the motor to run at full speed. A mosfet can be either open or closed, so the motor will either run at full speed or not run at all, so please explain what am I missing here
The voltage from the potentiometer is not going directly to the MOSFET's gate. It is going to an analog input pin on the Arduino, which is read with the analogRead command, and then converted to a pulse-width modulation value and sent to one of the Arduino's output pins using the analogWrite command. The trick is that the UNO R3 does not have a true analog output - it is a pulse-width modulation (PWM) signal that just alternates between high and low (fully on or fully off, as you noted). By adjusting the duty cycle (percentage of each period the signal is high) you can control the motor speed.
what if you add 4 motors? how do you connect?
You would need to use a separate Arduino pin and transistor for each motor.
What's the transistor number
The transistor is an N-channel MOSFET, something like this or equivalent will work: www.adafruit.com/product/355
اين الخريطة والكود
Code sir
i will make a Drone and it will be awsome!!!!!!!!!
Hey, i've copied everything exactly from this project but when I use analogwrite in an attempt to control the speed of the motor, it's not working. I'm not using a potentiometer, but here's my code:
const int MOTORPIN = 3;
void setup() {
// put your setup code here, to run once:
pinMode(MOTORPIN, OUTPUT);
analogWrite(MOTORPIN, 0);
}
void loop() {
// put your main code here, to run repeatedly:
analogWrite(MOTORPIN, 0);
}
I've ensured that pin 3 is indeed a PWM pin, and my circuit setup is exactly the same as yours, I've double and triple checked. What could be the problem? Thanks in advance!
Hi - since you have analogWrite(MOTORPIN,0), you are setting the speed to 0 and the motor will not spin. Does it spin if you change the 0 to a different number, between 0-255?
@@Science.Buddies sorry I should have clarified, when I set the speed to 0 with the analogWrite it still spins. It doesn't stop. No matter what number I put it spins at the same speed.
Ok - this could be a problem with your circuit and not your code. You could test with an LED instead of a motor to make sure the analogWrite function is working properly, since wiring an LED does not require a transistor and is less complicated than wiring a motor. We have videos earlier in our tutorial series about controlling LEDs.
Bro
He said transistor instead of
M etal
O xide
S emiconductor
F ield
E ffect
T ransistor
🤟🏻
My code keeps getting stuck on line 17
I literally understood nothing from this video.
I am not saying it to just be mean, I personally could not understand how it is done.
We would recommend starting at the very beginning of our Arduino tutorial playlist instead of jumping right to this video, which is more advanced. You can find the entire playlist here: th-cam.com/play/PLlBVuTSjOrclb0iCMSRpS_H1lSrlSVeEm.html&si=Mk1cQfK7YIpuIpq0
This video desperately needs a list of parts to buy.
Use PWM, this hurts my brain
The Arduino pins can handle only 20mA, the motor is >50mA… You’ll fry it…
Go for it if you want to burn your arduino
@œøǔÿpwm through a mosfet
is proportional integral derivative possible with this setup?
You can do PID control with an Arduino but this requires a sensor to measure the motor's rotational speed, called an encoder, which is not included in this video. This setup is "open loop" meaning there is no feedback signal that you can use for control.