Components Needed
For this project, the components needed are a rotary encoder, an LCD, 10 jumper wires (9 male to female), and a breadboard. The rotary encoder measures angular rotation and has similarities to potentiometers. However, it outputs a digital signal to determine the position of the knob, and can rotate all the way around its axis without stopping. Each click of the knob generates a digital signal that the Arduino uses to determine the position of the knob. The resolution of the encoder is determined by the number of clicks per rotation. Additionally, many encoders have a push button switch that can be pressed down.
Connecting the Components
The rotary encoder has four pins: VCC, ground, DT (data), and CLK (clock). To connect the components, the rotary encoder must be connected to the breadboard. The VCC pin should be connected to the 5V power supply, the ground pin should be connected to the ground supply, the DT pin should be connected to digital pin 2, and the CLK pin should be connected to digital pin 3. The LCD should be connected to the breadboard, with the VCC pin connected to the 5V power supply, the ground pin connected to the ground supply, and the data pins connected to the digital pins 4-7.
Custom Function and Interrupt Service Routine
To control the navigation menu, a custom function and an interrupt service routine (ISR) must be used. The custom function will be used to read the data from the rotary encoder and update the menu accordingly. The ISR will be used to detect when the rotary encoder is turned and call the custom function. The ISR is necessary because the Arduino needs to detect the rotary encoders input in real-time.
Including Libraries and Setting Up LCD
In order to fix the ship’s navigation menu with a rotary encoder, we must first include the necessary libraries and set up the LCD. This will allow us to display the menu options and the selected option on the LCD screen.
Setting Variables
We then set the variables for the data clock and switch pins on the encoder. We are also creating integer variables for the encoder and button value and states. Additionally, we set a constant integer value for the number of options, which is three in this case. This will determine how many systems we are going to set up to cycle through.
Creating an Array
We then create an array called menu options, set to the size of the number of options. In this case, the strings inside the brackets are the three system values for the array. We set the selected option to start at zero.
Initializing LCD
In the setup, we initialize the LCD, turn on the backlight, and set the cursor to start at the first row on the first column. We are going to print Select an Option on the first line. When we set the cursor to 01, we print the selected option on the first column of the second row. In this case, since the selected option is initially set to zero, Life Support is at index zero of the array, so that is what we are going to print first.
Setting Data, Clock and Switch Pins
We then set the data, clock, and switch pins as input and set the button value to a high state. We then attach our interrupt service routines, setting them to interrupt both the data and clock pins with the ISR. Our handle encoder will include a video at the end of this tutorial about how interrupts work. If you need more information about that, change means that the interrupt will be triggered when it either goes from high to low or low to high.
The selected option would eventually become a negative number, and then it would just start cycling through the negative numbers.
Understanding the Rotary Encoder
A rotary encoder is an electromechanical device used to measure the angular position of a rotating shaft. It is composed of a disc with a series of slots around its circumference, which are read by two sensors. As the shaft rotates, the sensors detect the slots and generate a pulse train that can be used to determine the angular position of the shaft. This pulse train is then used to control the navigation menu of a ship.
Implementing the Rotary Encoder
In order to implement the rotary encoder on a ship, it is necessary to first define the encoder function. This is done by creating two integer variables, A and B, which read in the state of the encoder pins. If the pins are equal to each other, then the encoder value is increased, and if not, then it is decreased. This is how the rotation of the encoder is determined. Additionally, the button state variable is set to read in the state of the switch pin. If the button state does not equal the last button state, then the perform select action function is called. This function prints the word “selected” on the first row of the LCD and the selected option on the second row.
Navigation Menu
Once the rotary encoder is implemented, the navigation menu can be displayed. This is done by using an if statement that checks if the encoder value does not equal the last encoder value. If this is the case, then the selected option is equal to the sum of the selected option and the encoder value. The modulo operator is then used to ensure that only the number of systems that are present are cycled through. This prevents the selected option from becoming a negative number.
Understanding Edge Cases
Edge cases are scenarios that are at the extreme ends or boundaries of what a program is expected to handle. In the context of this Arduino tutorial, edge cases refer to the situation where the selected option value falls below zero. To address this, the code ensures that, if this occurs, the last available option index is set as a way to wrap around those menu options.
The First Iteration of the Loop
The first few iterations of the loop involve selecting an option and printing it to the LCD screen. This is because the first option in the array is ‘Life Support’ and the selected option is initialized to zero. The code then resets the last encoder value to the encoder value outside of the if statement. It also sets the last button state to the button state.
Increasing the Value of the Selected Option
The code also allows for the value of the selected option to be increased past the number of systems that are actually available. This is done by using an if statement. If the selected option is less than zero, then the selected option equals the number of options minus one. This is to ensure that the value of the selected option does not fall below zero.
Printing the Selected Option to the LCD Screen
Once the selected option has been chosen, the code prints some space on the first row and the selected option on the second row. This is done by using the LCD.print() function. This allows the user to see which option they have chosen and to make any necessary adjustments.
Understanding the ROTARY ENCODER
A rotary encoder is a device used to measure the angular position of a shaft. It is commonly used in robotics and automation applications to control the movement of a motor or other device. It consists of a rotating shaft with two or more contacts that can be used to detect the position of the shaft. The contacts can be either mechanical or optical.
Using a ROTARY ENCODER with Arduino
Using a rotary encoder with Arduino is a great way to add user input to your project. It is a simple and intuitive way to control a device. The rotary encoder can be used to select a menu item, adjust a setting, or control a motor. In this tutorial, we will look at how to use a rotary encoder with Arduino to control a ship’s navigation menu.
Setting Up the ROTARY ENCODER
To set up the rotary encoder, you will need to connect it to your Arduino board. The rotary encoder has three pins: VCC, GND, and signal. Connect the VCC pin to the 5V pin on the Arduino board, the GND pin to the GND pin on the Arduino board, and the signal pin to one of the digital pins on the Arduino board.
Writing the Code
Once the rotary encoder is connected to the Arduino board, you can begin writing the code. The code will read the position of the rotary encoder and display the corresponding menu item on an LCD screen. The code will also keep track of the last position of the rotary encoder, so that it can detect when the user has rotated the encoder.
The code begins by declaring the variables for the rotary encoder and LCD. Then, the setup() function is used to set up the rotary encoder and LCD. The loop() function is used to read the position of the rotary encoder and display the corresponding menu item on the LCD.
Detecting Rotation
The code uses an if statement to detect when the user has rotated the rotary encoder. The if statement checks if the current position of the rotary encoder is different from the last position. If it is, then the code will execute the selected action. In this case, the code will display the corresponding menu item on the LCD.
What is a Rotary Encoder?
A rotary encoder is an electromechanical device used to measure the rotational movement of a shaft. It is also known as a shaft encoder or a rotary switch. It consists of a set of slotted disks that are connected to a shaft. As the shaft rotates, the slots on the disks align with a set of contacts, which are connected to a microcontroller. The microcontroller then interprets the signals from the contacts and determines the direction and speed of the shaft rotation.
How Does a Rotary Encoder Work?
A rotary encoder works by detecting the rotation of a shaft. As the shaft rotates, the slots on the disks align with a set of contacts, which are connected to a microcontroller. The microcontroller then interprets the signals from the contacts and determines the direction and speed of the shaft rotation. The microcontroller can then use this information to control the operation of a system, such as a navigation menu.
Using a Rotary Encoder With Arduino
Using a rotary encoder with Arduino is a great way to add a navigation menu to your project. The Arduino can detect the rotation of the encoder and use it to control the operation of the system. For example, you can use the encoder to cycle through a menu of options and select the one you want.
Connecting the Rotary Encoder to Arduino
Connecting the rotary encoder to Arduino is a simple process. First, connect the three pins of the encoder to the Arduino. The pins are labeled A, B, and C. Connect A to pin 2, B to pin 3, and C to pin 4. Then, connect the ground pin of the encoder to the ground pin of the Arduino.
Programming the Arduino
Once the encoder is connected to the Arduino, you can program the Arduino to detect the rotation of the encoder. The Arduino can detect the direction of rotation and the speed of rotation. This information can then be used to control the operation of a system, such as a navigation menu.
Creating a Navigation Menu
Once the Arduino is programmed to detect the rotation of the encoder, you can create a navigation menu. The menu can be displayed on an LCD screen. You can use the encoder to cycle through the menu options and select the one you want. Now we can cycle through the systems until we get to the one we want to select press the button and the LCD will now display which option we’ve selected.
A rotary encoder and an LCD can be used to fix a ships navigation menu. The rotary encoder measures angular rotation and outputs a digital signal to determine the position of the knob. The LCD is used to display the menu. A custom function and an interrupt service routine are necessary to control the navigation menu. With these components, a ships navigation menu can be fixed.
The rotary encoder is a useful device for controlling the navigation menu of a ship. By defining the encoder function, setting the button state variable, and using the modulo operator, it is possible to display the navigation menu and cycle through the different systems. This allows for easy and efficient navigation of a ship.
In this Arduino tutorial, we have discussed how to use a rotary encoder to fix a ship’s navigation menu. We have looked at how to address edge cases and how to increase the value of the selected option. We have also looked at how to print the selected option to the LCD screen. With this knowledge, you should be able to easily fix your ship’s navigation menu.
Using a rotary encoder with Arduino is a great way to add user input to your project. It is a simple and intuitive way to control a device. In this tutorial, we looked at how to use a rotary encoder with Arduino to control a ship’s navigation menu. We set up the rotary encoder and wrote the code to read the position of the rotary encoder and display the corresponding menu item on an LCD screen. We also looked at how to detect when the user has rotated the rotary encoder. With this knowledge, you can now use a rotary encoder with Arduino to control your ship’s navigation menu.
Using a rotary encoder with Arduino is a great way to add a navigation menu to your project. The Arduino can detect the rotation of the encoder and use it to control the operation of the system. You can use the encoder to cycle through a menu of options and select the one you want. The menu can be displayed on an LCD screen and the Arduino can detect the direction and speed of rotation. With a few simple steps, you can quickly and easily add a navigation menu to your project.
