Servo with arduino
A servo is a electronic component that translates digital information to the motor's positional information . Servos know their position from an onboard potentiometer, they also have gears to increase their torque. They are not meant for turning wheels or anything like that. They are more suitable for jobs requiring high precision such as controlling robotic arms, moving the control surfaces of an rc plane, moving sensors, etc. Servos come in many kinds, the most popular ones are 180 and 360 degrees servos, these numbers indicates the maximum angle the servo can rotate.
The servo connections are on the bottom to the text, as well as the servo lead on the left.
Note: If you are going to use the 3rd example then, connect the I2C as per the table below. For more info on how to use an I2C LCD check out my I2C tutorial
The first example code below performs a sweep action with the servo when executed. For starters we need to import the Servo library , we then create an instance (servo) of the Servo class, next we define our servo pin with #define keyword, later on we tell the arduino which pin the servo is attached to by passing in the servoPin variable to the attach() function and we tell the servo to go to 0 degrees with the write() function. In the void loop section, we tell the servo to go to 0 degrees, then wait 500 milliseconds, later which we tell it to go to 180 degrees and wait 500 milliseconds again.
In the second example, I will demonstrate how to control the servo with serial communication
My lcd backlight does not turn on?
Check your power and backlight power pins,
switch your jumper cables,
connect your VCC of the lcd to 3.3v on the arduino, if that works, then that might mean your 5v is not outputting power.
Lcd powers up but does not display anything?
If you are using a different arduino then your sda and scl pins might be different. Check for you pins.
My custom characters are not being displayed or they are not displaying it correctly?
In your code, make sure your begin() function is called before your createChar() function, this ensures your lcd is initialized before creating characters.
Servo does not turn, but arduino powers up?
You may have a faulty servo
Are you using low quality servos?
Answer should be NO
Is the controller sending a constant output?
Answer should be YES
Is your external servo power supply steady?
Answer should be YES
Arduino powers up but not lcd?
Try the ones above. If one of the above solutions work then you may have a faulty lcd or i2c backpack.
Arduino does not power up?
You may have a faulty arduino