Humidity Measuring Molecule

General Purpose Transistor NPN

Resistor 221 ohm

DHT22 Temperature Sensor

Arduino Mega 2560

Soldering iron (generic)

Arduino Web Editor

RGB LED

This object measures humidity and temperature to help you avoid unhealthy air quality and problems like very humid or dry air and mold growth. The object changes its color accordingly: from blue for good air quality to yellow, orange, and red for poor air quality. This is a fun and easy project to build. It helps remind you to open your windows regularly and makes your home a healthier place. You can also add more sensors to measure dust, CO2, and other things.The project emerged from my bachelor thesis project in design at Munich University of Applied Sciences. It was created in collaboration with <a href="http://tado.com/">Tado°</a>. You can check out the entire project <a href="http://www.katjaniggl.com/projects/project_tado.html">here</a>.<div class="se-component se-video-container __se__float-none" contenteditable="false" style="width: 100%;"><figure style="width: 100%; height: 56.25%; padding-bottom: 56.25%; margin: 0px;"><iframe frameborder="0" allowfullscreen="" src="https://www.youtube.com/embed/DyuhWdA7HB4" data-proportion="true" data-percentage="100%,56.25%" data-size="100%,56.25%" data-align="none" style="width: 100%; height: 100%;" data-index="0" data-file-size="0" data-origin="100%,56.25%"></iframe><figcaption contenteditable="true"><div>Breathing on the sensor to demonstrate the functionality</div></figcaption></figure></div><div id="gallery"><img id="gallery" src=https://projects.arduinocontent.cc/7eaddd6f-5ba9-4a4f-9ad3-0579d24b52bd.jpg /><figcaption> </figcaption><img id="gallery" src=https://projects.arduinocontent.cc/4f14bdba-6665-4cc2-add8-b50b9c31230d.jpg /><figcaption> </figcaption><img id="gallery" src=https://projects.arduinocontent.cc/cf62fcb8-6feb-487e-8adf-2598676207db.jpg /><figcaption> </figcaption></div>Abitaboutmyprocess:I used paper straws and ping pong balls to build the object. The ping pong balls create nice and dim colors.<figure><img src=https://projects.arduinocontent.cc/e517700f-6ca2-4b75-9439-5843596d0956.JPG /><figcaption> </figcaption></figure>Sodering RGBs LEDs to the cable pieces so they will fit into the straws. <figure><img src=https://projects.arduinocontent.cc/9bf58053-c77d-4d85-bab1-10aafdbdbf10.jpeg /><figcaption> </figcaption></figure>I decided not to control every LED individually but in groups of four to create a easier set up. This means four LEDs are connected to one pin. You can learn how to do this <a href="https://arduino.stackexchange.com/questions/29367/individual-control-of-multiple-rgb-leds">here</a>.<figure><img src=https://projects.arduinocontent.cc/89eb148b-e755-4bb6-bd27-c15cef9ef186.jpeg /><figcaption> </figcaption></figure>Putting it all together...<figure><img src=https://projects.arduinocontent.cc/d57b6864-8f00-4ff6-a3f9-a203e015a6fb.JPG /><figcaption> </figcaption></figure>Adding the ping pong balls at the end.<figure><img src=https://projects.arduinocontent.cc/b7ba4bc6-a3bd-4f66-b23a-2f26c0ad6049.JPG /><figcaption> </figcaption></figure>The result:<figure><img src=https://projects.arduinocontent.cc/5aca96a1-5426-42a4-b810-2f65ae4564ea.JPG /><figcaption> </figcaption></figure>I used a wooden box to store the boards and a simple power bank. By breathing on the sensor I could test how it works.<figure><img src=https://projects.arduinocontent.cc/e78d9bf0-6c81-4b43-bd23-e11b2292a4e0.jpg /><figcaption> </figcaption></figure>UX Design bachelor thesis by Katja Niggl.Thanks for reading and let me know what you think. :-)

Humidity Measuring Molecule

Measure humidity and temperature levels in your home to avoid unhealthy air quality with this fun project.