If you are interested in creating a low-cost contactless infrared thermometer powered by the Arduino platform, you may be interested in a new project published on the Instructables website and featured on the official Arduino blog. The project has been created by “opengreenenergy,” a DIY hobbyist by passion and Power Engineer by profession. The inspiration for the project is given to the previously released handheld thermometers.
Challenges with Handheld Thermometers
“The main drawback of the handheld thermometer is its performance depends on the operator and the distance to the forehead. To address these problems, a device is made that can be mounted on the wall for fever screening in public areas without an operator. The hardware can measure human body temperature automatically when the distance between the sensor and forehead is adequate.”
Handheld thermometers, while useful, have several limitations. Their accuracy can be compromised by the distance at which they are held from the forehead and the steadiness of the operator’s hand. This can lead to inconsistent readings, which is particularly problematic in high-traffic public areas where quick and reliable temperature screening is essential. By mounting the thermometer on a wall, this project eliminates the variability introduced by human operators, ensuring more consistent and reliable readings.
Design and Components
“All of the electronics were assembled onto a custom-designed PCB that has headers for the various modules and LEDs, along with a place for the Arduino and battery charging circuit. All of these components were then positioned inside of a 3D-printed enclosure that holds both the batteries and PCB at the bottom and the screen/LEDs at the top.”
The design of this contactless IR thermometer is both innovative and practical. The custom-designed PCB (Printed Circuit Board) is the heart of the device, integrating various modules and LEDs. The Arduino microcontroller serves as the brain, processing the data collected by the IR sensor. The inclusion of a battery charging circuit ensures that the device can be easily recharged, making it convenient for continuous use.
The 3D-printed enclosure is another highlight of the project. It not only houses the electronic components securely but also provides a user-friendly interface with a screen and LEDs. The screen displays the temperature readings, while the LEDs can be used to indicate different statuses, such as when the device is ready to take a reading or if the temperature is above a certain threshold.
Applications and Benefits
This DIY contactless IR thermometer has numerous applications, particularly in the context of the ongoing global health situation. It can be installed in public places such as schools, offices, shopping malls, and airports to facilitate quick and efficient fever screening. By automating the process, it reduces the need for manual intervention, thereby minimizing the risk of cross-contamination.
Moreover, the project is a testament to the versatility and power of the Arduino platform. It demonstrates how accessible technology can be leveraged to create practical solutions for real-world problems. The open-source nature of the project means that anyone with basic electronics knowledge can replicate and even improve upon the design.
In conclusion, this low-cost contactless IR thermometer project is an excellent example of how DIY enthusiasts and professionals can come together to create innovative solutions. By addressing the limitations of handheld thermometers and providing a reliable, automated alternative, it has the potential to make a significant impact in public health and safety.
Source: Instructables : Arduino Blog
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