Servomoteur avec Arduino : Guide Complet
Ce guide complet explique comment utiliser des servomoteurs avec Arduino. Apprenez à contrôler des servomoteurs avec des exemples pratiques et du code détaillé.
Arduino- 1. Introduction aux servomoteurs et leurs applications.
- 3. Câblage des servomoteurs avec Arduino.
- 4. Programmation de base pour le contrôle.
- 5. Exemples de projets utilisant des servomoteurs.
- 7. Importance de la précision dans le contrôle.
- 8. Applications pratiques des servomoteurs.
- 9. Ressources pour approfondir l'apprentissage.
- 10. Conclusion sur l'utilisation des servomoteurs.
What happens if a servo motor draws more than 500 mA?
If the servo motor draws more than 500ma of current, the arduino board might lose it’s power and reset. it’s better to always use a separate power source for the servo motors. how many servo motors can an arduino control?
Can I power a servo directly from Arduino?
Most arduino boards, including the arduino uno, can only handle 450-500 ma current. so we should not power a servo directly from the arduino board for a complete project. however, it is feasible to power a single sg90 servo motor from the arduino for testing purposes. connecting a servo to the arduino is very easy.
How many servos can I use on an Arduino board?
The arduino servo library supports 12 servos on most arduino boards and 48 on the arduino mega board. here, i will use an arduino uno board and 4 servo motors. the servos are connected to pins 8, 9, 10, and 11. i will use a 5-volt 3-ampere power supply to power the servos.
What is servo motor?
A servo motor is a closed-loop system that uses position feedback to control its motion and final position. There are many types of servo motors and their main feature is the ability to precisely control the position of their shaft
How servo motors work?
There are four main components inside of a hobby servo, a DC motor, a gearbox, a potentiometer and a control circuit. The DC motor is high speed and low torque but the gearbox reduces the speed to around 60 RPM and at the same time increases the torque
Popular rc / hobby servos for arduino projects
There are many different models and manufacturers of RC or hobby. The main consideration when choosing a servo motor is its torque, operating voltage, current draw and size. Here are the two most popular servo models among makers, the SG90 Micro Servo and the MG996R. SG90 Micro Servotechnical specifications: MG996R Servotechnical specifications:
Arduino servo motor control
Let’s put the above said to test and make a practical example of controlling a hobby servo using Arduino. I will use the MG996R which is a high-torque servo featuring metal gearing with stall torque of 10 kg-cm. The high torque comes at a price and that’s the stall current of the servo which is 2.5A
Servo motor control arduino code
Now let’s take a look at the Arduino code for controlling the servo motor. The code is very simple. We just need to define the pin to which the servo is connect, define that pin as an output, and in the loop section generate pulses with the specific duration and frequency as we explained earlier
Controlling multiple servo motors with arduino
The Arduino servo library supports controlling of up to 12 servos at the same time with most the Arduino boards, and 48 servos using the Arduino Mega board. On top of that, controlling multiple servo motors with Arduino is as easy as controlling just a single one
Arduino and pca9685 pwm/ servo driver
There’s also another way of controlling servos with Arduino, and that’s using the PCA9685 servo driver. This is a 16-Channel 12-bit PWM and servo driver which communicates with Arduino using the I2C bus. It has a built in clock so it can drive 16 servos free running, or independently of Arduino
Troubleshooting
Servo motor jitters and resets my Arduino board
Dimensions and 3d model
I made 3D models of the two most popular servo motors, the SG90 Micro Servo and the MG996R servo motor. You can download load them from the links below.
Conclusion
So, we have covered almost everything we need to know about using servo motors with Arduino. Of course, there are some many manufacturers and models of these type of hobby or RC servo motors, and each of them has its own unique features that might differ from what we explained above
