Introduction: As part of our effort to live smarter, we investigate a straightforward yet efficient project: adding servos and ultrasonic sensors to a door system to enable responsive automation.
Theories:
Ultrasonic sensors: These sensors estimate distance using sound waves that are inaudible to humans. Their ability to generate pulses and measure the time it takes for waves to return from an item makes them ideal for people’s detection in close proximity.
Servos: Servos are tiny but mighty motors that accurately regulate an object’s rotation. A servo takes on the role of the muscle in this project, opening and shutting the door as needed.
Execution of the project:
- Setting up the Ultrasonic Sensor:
- Connect the ultrasonic sensor to the Arduino, ensuring power, ground, and signal pins are in place.
- Code the Arduino to read distance data from the ultrasonic sensor.
- Integrating the Servo:
- Connect the servo motor, securing power, ground, and signal connections.
- Write code to control the servo’s rotation, opening it to 180 degrees and returning it to 0 degrees.
- Combining an Ultrasonic Sensor and Servo:
- Merge the ultrasonic sensor and servo code to create a system where the door opens when a person is detected at a set distance.
- Adding Delays:
- Fine-tune the code to include a 2-second delay after opening the door before smoothly closing it.
Conclusion: This combination of servos and ultrasonic sensors demonstrates the elegance of straightforward automation. There are several uses for the human presence-activated responsive door system.
Video Demonstration: [Ultrasonic controlling a servo.]
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