Introduction
This article will discuss the process of creating an Arduino LED tester and resistor calculator. It will explain the components needed, the steps to build it, and the functionality of the device. The device is designed to measure the current and voltage of a diode, and display the required resistor value for a given voltage and current. Additionally, the device will provide a code for the resistor, which can be used to purchase the component in an electronic store.
Components Needed
To build the Arduino LED Tester + Resistor Calculator, you will need an Arduino Nano microcontroller, a 16×2 LCD display with I2C communication protocol, seven resistors, one capacitor, and four buttons.
Circuit Diagram
The circuit diagram for the Arduino LED Tester + Resistor Calculator is relatively simple. It consists of the Arduino Nano, the 16×2 LCD display, the seven resistors, the one capacitor, and the four buttons. The resistors, capacitor, and buttons are all connected to the Arduino Nano, while the LCD display is connected to the Arduino Nano via the I2C communication protocol.
Arduino Code
The code for the Arduino LED Tester + Resistor Calculator is based on the code from Dave Cook’s model, with some modifications. The code is written in the Arduino IDE and is relatively simple. It consists of a setup function, a loop function, and a few functions for controlling the device. The setup function initializes the LCD display and sets the initial values for the current and voltage to which the LED will be connected. The loop function is responsible for reading the values from the buttons and displaying them on the LCD display. The other functions are responsible for controlling the device, such as setting the current and voltage values, and calculating the resistor value.
Testing the Device
To test the Arduino LED Tester + Resistor Calculator, connect an LED to the device and turn it on. The LCD display will show the previously defined values for the current and voltage to which the LED is connected, namely a current of 10 milliamps and a voltage of 14 volts. The device will then calculate the resistor value needed to connect the LED to the higher voltage. The device can also be used to test different LEDs and determine their characteristics, such as forward voltage and maximum current.
9 kilms resistors.
Components
The components needed to build the Arduino LED tester and resistor calculator are: an Arduino board, a display, two buttons, and a resistor. The Arduino board is the main component, and is used to control the device. The display is used to show the current and voltage of the diode, as well as the required resistor value. The two buttons are used to set the current and voltage of the diode. Finally, the resistor is used to connect the diode to the device.
Building the Device
The first step in building the device is to connect the components to the Arduino board. The display should be connected to the board’s digital pins, and the two buttons should be connected to the board’s analog pins. The resistor should then be connected to the board’s power pins. Once the components are connected, the code for the device should be uploaded to the Arduino board.
Functionality
The device is designed to measure the current and voltage of a diode, and display the required resistor value for a given voltage and current. The upper buttons can be used to set the current that flows through the diode in the range from 1 to 20 milliamps. The lower buttons set the value of the voltage to which the diode would be connected through a resistor in a real circuit. This voltage can be set from 1 to 99 volts, and the display then shows the required resistor value, depending on the selected voltage and current. Additionally, the lower right part of the display will show the code of the resistor, which can be used to purchase the component in an electronic store.
Testing the Device
Once the device is built, it can be tested by connecting a diode to it. If the diode is connected correctly, the LED will light up. If the diode is connected with reverse polarity, the diode will remain functional, but will not light up. Additionally, the display will show the characteristics of the diode, such as the forward voltage and current, as well as the required resistor value. The resistor value can be changed by adjusting the voltage or current of the diode. For example, if the voltage is increased to 24 volts, the required resistor value will be 2.2 kilohms. If the current is decreased to 7 milliamps, the required resistor value will be 3.9 kilohms.
Materials Needed
To make an Arduino LED tester and resistor calculator, the following materials are required: 3 kilohm resistor, 3mm green Music lead, 5mm red Music lid, 8mm High brightness Warm White Music lead, 560 ohm resistor, 9 volts 34 ohms High brightness P, her LD White, 3 30 ohms Music resistor, 10mm big white lead, 3mm Blue lead, 2.2k resistor, and 3mm yellow lead.
Assembling the Parts
The first step in assembling the Arduino LED tester and resistor calculator is to connect the 3 kilohm resistor to the green Music lead. This will provide the necessary current for the device. Next, the red Music lid should be connected to the 560 ohm resistor. This will provide the necessary voltage for the device. The 8mm High brightness Warm White Music lead should then be connected to the 9 volts 34 ohms High brightness P, her LD White. This will provide the necessary forward voltage for the device.
The 3 30 ohms Music resistor should then be connected to the 10mm big white lead. This will provide the necessary current for the device. The 3mm Blue lead should then be connected to the 2.2k resistor. This will provide the necessary voltage for the device. Finally, the 3mm yellow lead should be connected to the 3 kilohm resistor. This will provide the necessary forward voltage for the device.
Testing the Device
Once the device is assembled, it can be tested to ensure that it is working properly. The first step is to turn on the device and check that all of the LEDs are lighting up. If any of the LEDs are not lighting up, then the device should be checked for any loose connections or faulty components. Once all of the LEDs are lighting up, the device should be tested for its accuracy. This can be done by connecting a resistor to the device and measuring the voltage across it. If the voltage is within the expected range, then the device is working properly.
Calculating Resistor Values
The Arduino LED tester and resistor calculator can also be used to calculate the value of a resistor. This can be done by connecting a resistor to the device and measuring the voltage across it. The voltage can then be used to calculate the resistance of the resistor. The resistance can then be used to calculate the wattage of the resistor. This is useful for determining the power requirements of a circuit.
The Arduino LED Tester + Resistor Calculator is a useful tool for testing and determining the characteristics of LEDs, as well as calculating the resistor value needed to connect the LED to a higher voltage. The device is relatively simple to build and consists of a few components, and the code is relatively simple to write. The device can be used to test different LEDs and determine their characteristics, as well as calculate the resistor value needed to connect the LED to a higher voltage.
The Arduino LED tester and resistor calculator is a useful device for measuring the current and voltage of a diode, and displaying the required resistor value for a given voltage and current. The device is easy to build, and can be tested by connecting a diode to it. The
The Arduino LED tester and resistor calculator is a useful device for testing and calculating the value of resistors. It can be used to test the accuracy of the device and to calculate the value of a resistor. This can be used to determine the power requirements of a circuit.
