Linear servo motor arduino12/28/2023 This setup is capable of variable speed control utilizing the analogWrite command to set the PWM signal. The Arduino microcontroller and MegaMoto Plus H-bridge can be used to implement much more complicated control routines. The functionality of this system goes beyond what is showcased in this article. These values can be changed based on whether you are attaching additional components to the Arduino that may then require shifting pin connections around. Double check that your connections to the Arduino board correlate with the numbers entered. This section of code is the pin connection setup. This understanding will allow you to make adjustments based on your application. It is important to walk through the code one line at a time to understand how it functions. The following section walks through the program definitions, setup, main loop, and pushbutton functions for an Arduino controlled linear actuator. The analogRead command is used to measure the current draw by the actuator motor, which will verify when the actuator is at the end of its stroke. The digitalRead command is used to check if the pushbuttons have been pressed or released. The analogWrite command is used to set the value for the PWM signal in the range of 0 to 255 to the H-bridge. In the program below, the digitalWrite command is used to enable or disable the H-bridge, and to configure the pins used for the pushbuttons. Additionally, the digitalRead and analogRead commands are used when the Arduino needs to check the signal on a specific pin. To change what signal the Arduino is sending to a specific pin the digitalWrite and analogWrite commands are used. The pinMode Arduino command is used to define the pins as inputs or outputs. Therefore, it is important to double check your connections and compare it to the code you have entered. Bear in mind that your system wiring will affect your Arduino code. You will need to install the Arduino IDE on a desktop computer or laptop. If you are using two separate power supplies, it is important that their grounds are shared to avoid a floating ground scenario. The Arduino runs on a 5V supply and the H-Bridge runs on 12V. The block diagram below briefly explains the power requirements and connections. The pins used by the H-bridge are preset and cannot be changed. The H-bridge has four connections to the Arduino, three outputs and one input. Each pushbutton requires a single input, which are chosen from the Arduino’s available GPIO pins. The H-bridge can handle the power requirements and can easily be used to control an actuator with an Arduino.įor this system, there are connections from the Arduino to the MegaMoto Plus H-bridge, and to the two pushbuttons. To avoid damaging the Arduino, the MegaMoto Plus H-bridge is used. These values are much higher than what an Arduino microcontroller is capable of supplying and will cause ‘magic’ smoke to come out of the Arduino. The actuator used in this setup requires a 12VDC input voltage and up to 8A of current at full load. The following pieces of hardware are required for an Arduino controlled linear actuator, all of which can be purchased from Progressive Automations: You can easily control an actuator with an Arduino board, and this article will showcase how to build and program an Arduino controlled linear actuator that can be easily adapted to fit your application! The PA-18 Track Linear Actuator is our largest fixed-length actuator and is commonly used in custom cabinetry, home automation, and robotics.
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