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Describe how an MDS can be used to switch an LED on and off.

145 viewsG13-11. AL ICT IOT applications
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  1. How can an MDS use a Light Dependent Resistor (LDR) to control LEDs?

  2. What is the process of using a temperature sensor with an MDS to control a fan?

  3. How does a magnetic switch work with an MDS for door open/close detection?

  4. What software tools are needed to develop applications for an MDS?

      5.What software tools are needed to develop applications for an MDS?

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Ruwan Suraweera Changed status to publish June 23, 2025
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Answers and Descriptions:

  1. Answer: An MDS can switch an LED on/off by connecting the LED to a digital output pin and programming the pin to send high (on) or low (off) signals.
    Description: For example, in Arduino, a digital pin is set as output, and code (e.g., digitalWrite(pin, HIGH)) controls the LED based on conditions like a button press.

  2. Answer: An LDR measures ambient light intensity, and the MDS uses this data to turn LEDs on/off based on predefined thresholds.
    Description: The LDR’s analog input is read by the MDS, and code compares the value to a threshold, triggering digital output to control LEDs, useful for automatic lighting.

  3. Answer: A temperature sensor sends temperature data to the MDS, which processes it and activates a fan via a digital output pin if the temperature exceeds a threshold.
    Description: The sensor’s analog input is read, and code (e.g., if (temp > 30) { digitalWrite(fanPin, HIGH); }) controls the fan, enabling climate control applications.

  4. Answer: A magnetic switch detects door status (open/closed) by sending a digital signal to the MDS, which processes it to trigger actions like alarms.
    Description: The switch changes state when a magnet moves away (door opens), and the MDS reads this via a digital input pin, executing programmed responses.

  5. Answer: Software tools include an IDE (e.g., Arduino IDE) with a code editor, compiler, and programmer.
    Description: These tools allow developers to write code, compile it into machine-readable format, and upload it to the MDS, streamlining application development.

Arduino Technology Architecture and its Applications

Caption: An Arduino Uno board, commonly used in MDS applications for controlling LEDs, sensors, and other components

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Ruwan Suraweera Changed status to publish June 23, 2025
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