Arduino Basics - Lesson 12 - Using buttons to control a Servo motor
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- เผยแพร่เมื่อ 9 มิ.ย. 2024
- In the 12th video in the Arduino Basics video series we will be exploring the basics of how to use buttons to control our Servo motor with an Arduino.
You can find the wiring diagram here: ibb.co/cw4gwxk
Materials Needed:
- 4-pin breadboard button (x2)
- 10 kilo ohm resistor (x2)
- Servo motor
- jumper cables
Links:
- CodeWithConner: www.codewithconner.ca/
- TPT: www.teacherspayteachers.com/S...
0:00 - Introduction
0:28 - Wiring Diagram
2:17 - Main Lesson
9:47 - Extension
10:29 - Challenge
This is exactly what I needed to control the cueing and auto lift for my new turntable build. Thank you.
This video is incredible! I was wanting to learn how to do exactly this for months now and this video helped me out so much, thank you!
Thanks sir I really appreciate that clear explanation.Your channel should get more attention!!!!!!
I appreciate that! Hopefully someday it will :)
Amazing tutorial!!! when I want to make a project I search on youtube do the wiring and code it, but sometimes some videos have a link to copy the code, but I love this one that doesn't need to copy paste a code, and its easy what mistake I made and it was a short coding so it's simple for me! (but sometimes when the video has a link in the desc for me it means that the code is too long). But amazing simple project for beginners
Very good tutorial, instant subbed.
Awesome. Glad to have you :)
Thanks for the tutorial. I subscribed
Nice tutorial Keep up!
deserves a subscription!!
This explanation was perfect. I was even able to modify the loop function to incorporate 3 buttons, and also create a loop that moves the Servo to a specified angle, thanks for your help! Here's the code I wrote under the loop function:
void loop() {
int button1State = digitalRead(button1);
int button2State = digitalRead(button2);
int button3State = digitalRead(button3);
if(button1State == HIGH && servoPosition = 0)
{
myservo.write(servoPosition);
servoPosition = 0;
delay(100);
}
else if(button3State == HIGH && servoPosition >=0)
{
myservo.write(servoPosition);
servoPosition = 180;
delay(100);
}
}
The only problem I have with this is that regardless of which button you press first, you have to press the second button that sets it back to angle '0' right after, otherwise the Arduino won't move the servo anywhere. Will have to play around with the if and else if statements a little more, none the less, great lesson!
Nicely done! With your code the way it is. Once you press button3 you’re stuck at 180 until you press button1. As the other two buttons have if statement conditions that can’t run at a position of 180.
I hope that helps a bit. Keep it up :)
You just saved my semester with this code, literally. Thank you so much
Thank You!
tried to compile sketch and this is coming up Compilation error: 'Servo1write' was not declared in this scope
i have tried fixing it with no luck . help please.
Hello, I would like to build a similar circuit for a model car (mechanical transmission). It should be operated with 2 buttons (up/down). Each time you press the button, the servo should adjust by 10 degrees (or another defined number of degrees).
Neutral = 0 position
1st gear = one down
Neutral = on up
2nd gear = one up
3rd gear = one up
4th gear = one up
The entire transmission should then be switched up (UP) and down (down) using 2 buttons.
It would be great if the “UP” button also had the function if you switched it to its 0 position (neutral) for 3 seconds.
I would be very grateful if you could help me with this.
Thank you.
Greetings Hans
OK, i HAVE BEEN ABLE TO DO THIS, HOWEVER, WHAT IF i WANT TO HOLD THE SERVO, IN EACH POSITION? SAY, i PUSH THE LEFT BUTTON, AND, THE SERVO MOVES TO 60 DEGREES, STOPS, AND HOLDS POSITION, UNTIL COMMANDED TO MOVE, BY THE RIGHT BUTTON? SAME THING WITH THE RIGHT BUTTON. I WANT IT TO MOVE TO 160 DEGREES POSITION, STOP AND HOLD THERE, UNTIL COMMANDED TO MOVE.
HOW WOULD YOU CODE THAT? THANKS!!!
Conor , I would like to use a PCA9865 , have you any videos on how this would work rather than a direct feed form ardiuno board ...i want to move the servo to preset positions depending on a feed from a toggle switch ..
So I haven't done a project video with a servo breakout board like this, but they are awesome. This site has a ton of good info on setting one up though: learn.adafruit.com/16-channel-pwm-servo-driver?view=all
How to write many angles settings for each buttons? Plss help
omg thank u very much
Glad it helped
hey ive got a question... Great video btw:
I want to control my servo so when i press a buttondown it rotates 180*. But then when i stop pressing it, it goes back to 0*.
i tried altering your code but i cant figure it out
Shoot me an email: codewithconner@gmail.com with your code and I'll see if I can help
I have an issue with my circuit and im hoping you could help. I have two servos connected to a button and i want the servos to start at zero to move to 45 degrees when button is pushed (not held), and when the button is pressed again, servos move back to 0. where in my code is it incorrect ?
#include
int buttonPin =2;
int servoPin =3;
int servo2Pin =5;
Servo servo1;
Servo servo2;
int servoPosition =0;
int servoIncrement =4.5;
void setup() {
servo1.attach(servoPin);
servo2.attach(servo2Pin);
servo1.write(servoPosition);
servo2.write(servoPosition);
}
void loop() {
int buttonState =digitalRead(buttonPin);
if (buttonState==HIGH&&servoPosition=0)
{servoPosition-=servoIncrement;
servo1.write(0);
servo2.write(0);
delay(10);
}
}
Code didn't work for me.
#include
int buttonPin = 4;
int button2Pin = 7;
int servoPin = 3;
Servo Servo1;
int servoPosition = 0;
void setup()
{
// put your setup code here, to run once:
Servo1.attach(servopin);
Servo1.write(servoPosition);
}
void loop() {
// put your main code here, to run repeatedly:
int buttonState = digitalRead(buttonPin);
int button2State = digitalRead(button2Pin);
Error massage says ServoPin was not declared in this scope
When you declared servoPin you used a capital P but when you access it later you used a lower case p. That’s why it can’t find it.
hey hey, I used your code and it works perfect! but I want my servo to turn slower. How do you have to change this code so that the servo will turn slower, because it is going quite fast now?
The easiest way would be to just increase the length of the delay inside the if/else statement in your loop function where you increment/decrement the servoposition variable.
How would the code be different if I wanted to press a button and the servo rotates so that I don't have to keep holding the button?
Basically, in the code below, where we increment servoposition by 1, you would instead send it all the way to position 180. Or if you want it to sweep the other way in the else statement, send it to 0. We were iterating by sending it one degree at a time. Be sure to increase the delay if you do this otherwise you'll get a LOT of HIGH reads on the button before you actually let go of it.
if(buttonState == HIGH && servoPosition
What software do you use for your wiring diagrams?
Most of them I do with tinkercad circuits. But some I had to use fritzing.
Can you please tell me the code for when i pressed the two buttons together then the servo goes to 0 ??? i loved the tutorial from your video...keep up the good work!!!
Email codewithconner@gmail.com and I can send you solution code.
Really loved your video. Great teaching style. I understand the coding. Have typed in code, checked and checked, but when I compile, after : else if(button2State == HIGH) && servoPosition >=0 //else if we are over 0 button 2 is on" get "expected ";" before "{" token. Can't see the error!. Frustrating
Can you paste the whole if/else if blocks of code here or email them to me codewithconner@gmail.com
@@CodeWithConner here it is
if(buttonState == HIGH) && servoPosition =0 //else if we are over 0 button 2 is on
{
Servo1.write(servoPosition); //write current position
servoPosition--; //subtract 1 to position
delay(5); //delay 5 ms
}
The word (Servo1) didn't activate durring writing the code broo !!
Hello sir , my question is .. when servo move to 1°-180° and i want it delay for 5s .. after that automove back to 180°-1° .. each button has a same instruction but the different is value of angle movement servo.. so how the code sir? Please reply n help me to solve this problem. Tq
If the only difference between the button is the speed of the movement, basically the first if statement would do a full sweep from 0 - 180, delay 5, then sweep back to 0. The "sweep" would be a for loop that changes the servo angle and writes it however many times you want. The finer/smaller the angle adjustment each time the slower/smoother the movement will be.
hello sir Conner... i have followed the code you have written and i modified some of it for the application of my project.. I've built a pingpong robot and i planned to use a servo motor on the panning. i want to control the servo with 6 buttons each have different angles to perform on the servo. The first time i uploaded the code to my arduino it worked very well, but later i have encountered a problem.. when i turned on the arduino the program will automatically run, executing the program on either of the buttons. please note that the buttons are not yet pressed.. please help me sir...
Shoot me an email to codewithconner@gmail.com with your code and I can have a look for you. No promises but I'll try and help.
So, what if I want to use 3 buttons with 0, 45, 90 degrees each button, sorry if my question seems lazy to try, just curious and currently I don't have an arduino
This would be pretty straight forward. When a buttons read value is high, set the servo to the desired angle. Repeat for multiple buttons.
@@CodeWithConner thanks for the answer man, appreciate it 🔥
Hello guys , i have a great problem and i Hope you would help me please. I want to pilot a servo moteur with a signal input 5 volt like your button system ( in réality i want to pilote the servo with a signal of a VHF REMOTE CONTROL whose work on 12 volt and reduct to 5 volt with a convert to control in finely an excavator machine....when i push on a button of the VHF REMOTE control , i want it's do the same like your button program.... Which modification on your programme i 'll have to do for it's work . Thanks you for your compréhension , and i live in France ...maybe i'm lucky if you speak french .thanks you .
I'm not sure about the VHF remote input source, but in theory as long as you can determine when the button you want is being pressed on the remote, you can then put that into an if statement and within the statement, set the angle change for the servo motor. Essentially replacing the buttonread == HIGH from the button version with whatever input check there is for your remote.
can i use this without a resistor
You COULD but you'll likely get erratic button behavior. Read this for a bit more insight: create.arduino.cc/projecthub/muhammad-aqib/arduino-button-tutorial-using-arduino-digitalread-function-08adb5
EVEN BETTER... HAVE A SPDT SWITCH, AND USE THE SWITCH TO DETERMINE THE DIRECTION OF THE SERVO, AND A PUSH BUTTON, TO TELL IT TO MOVE TO THAT POSITION, WHEN COMMANDED. HOW WOULD YOU DO THAT? i HAVE TRIED SEVERAL WAYS, AND CANNOT GET IT TO STAY IN EITHER POSITION. IT JUST CYCLES BACK AND FORTH, NEVER STOPS... I AM FRUSTRATED. I LEARN BETTER WHEN SHOWN HOW TO DO SOMETHING, AND THEN I CAN APPLY IT, TO OTHER SITUATIONS THAT I AM WORKING WITH AT A LATER DATE.
THANKS AGAIN!!!
So really the idea here is that whatever is in your loop() function directly will just keep happening over and over again. The key to all of this is the if statements in the loop function. There are a couple reasons this can get messed up, for example depending on how you are detecting your button state. Even though we might think we aren't holding a button down, the Arduino will recognize it several thousand times in a second potentially. Having a delay built in anytime it detects a button push helps prevent it re-running the code more than once per button press. But, if you have no motor movement in your main loop() function, but an if statement for a button that just moves it a certain amount in a certain direction and doesn't do any kind of looping or incremental change this should be doable.
something like: if(buttonstate==HIGH){Servo1.write(120); delay(1000);}
would just move the motor to 120 and do nothing else.
do you have a copy of the code to post for this?
Send me an email. codewithconner@gmail.com and I'll send it to you.
hey can you send me the code :)
i eally don't know where is the mistakemaking thnk why wouldn't you JUST POST THE CODE!!!
#include
int buttonPin = 4;
int button2Pin = 7;
int servoPin = 3
Servo ;
int ServoPosition = 0;
void setup()
{
Servo1.attach(servoPin);
Servo1.write (servoPosition);
Serial. begin (9600);
}
void loop()
{
int burtonState = digitalRead(buttonPin);
int button2State = digitalRead(button2Pin);
if(buttonState == HIGH && servoPosition
Feel free to share if you want. I don’t post the code because I think there is better learning in following along and in the act of typing out the code and the brackets and all of it yourself.
To each their own.
#include
int buttonPin = 4;
int button2Pin = 7;
int servopin = 3;
Servo Servo1;
int servoPosition = 0;
void setup()
{
// put your setup code here, to run once:
Servo1.attach(servopin);
Servo1.write(servoPosition);
}
void loop() {
// put your main code here, to run repeatedly:
int buttonState = digitalRead(buttonPin);
int button2State = digitalRead(button2Pin);
if(buttonState == HIGH && servoPosition