Electronics enthusiasts often seek new and innovative ways to incorporate technology into everyday life. In this project, we will build a smart temperature-controlled fan using the SKT552/16E, a crucial component for temperature sensing and control. This project is perfect for beginners and intermediate hobbyists looking to explore temperature sensing and automated responses.

Project Overview

The aim of this project is to create a fan system that automatically adjusts its speed based on ambient temperature. It can be used in rooms, greenhouses, or even electronic enclosures to prevent overheating. The SKT552/16E, which is a key part of the system, plays a vital role in detecting temperature changes and triggering the fan accordingly.

Required Components

●  SKT552/16E temperature sensor
●  12V DC fan
●  Relay module
●  Power supply (12V adapter or battery pack)
●  Transistors and diodes (for switching)
●  Resistors and capacitors (for signal conditioning)
●  LED indicators (for status display)
●  Push buttons (for manual override)
●  Enclosure (for housing the components)
●  Wires and soldering tools

Step 1: Setting Up the Temperature Sensor

The SKT552/16E temperature sensor must be properly positioned in the environment where temperature changes need to be detected. Ideally, it should be placed away from direct airflow to ensure accurate readings.
●  Connect the sensor to the main circuit.
●  Ensure proper connections with power and signal lines.
●  Secure the sensor using a holder or mount.

Step 2: Relay Circuit and Fan Connection

The fan is controlled through a relay module, which acts as an electronic switch. When the temperature surpasses a set threshold, the relay activates the fan, ensuring effective cooling.
●  Connect the relay module to the circuit, ensuring proper polarity.
●  Attach the 12V fan to the relay’s output terminals.
●  Include an LED indicator to show when the fan is operational.

Step 3: Signal Processing and Fan Activation

The SKT552/16E generates a temperature-dependent signal, which needs to be processed before triggering the relay. This is done using transistors and resistors to amplify and condition the signal.
●  Design the signal processing stage using appropriate resistors and capacitors.
●  Configure the circuit to activate the relay when a threshold temperature is detected.
●  Implement a delay mechanism to prevent frequent switching.

Step 4: Adding Manual Control and Indicators

While automation is the key feature, adding manual control provides flexibility. Push buttons allow users to turn the fan on/off manually.
●  Connect push buttons in parallel to the relay control.
●  Use an LED to indicate manual mode activation.
●  Ensure the system prioritizes automatic control unless overridden.

Step 5: Assembly and Testing

Once all components are connected, it’s time to assemble the system into an enclosure and test its functionality.
●  Secure all wiring inside a protective case.
●  Ensure proper insulation to prevent short circuits.
●  Test the system by gradually increasing temperature and observing fan activation.

Conclusion

This DIY smart temperature-controlled fan is a practical and rewarding project that demonstrates the use of SKT552/16E in a real-world application. It provides hands-on experience with temperature sensing, relay switching, and circuit design. By making modifications, such as integrating a microcontroller or adding an LCD display, users can further enhance the system’s capabilities. Whether for home automation or industrial applications, this project lays the foundation for understanding and implementing temperature-based electronic solutions.