Creating an outdoor plant box with a built-in VOC (Volatile Organic Compounds) detector is a fantastic way to combine gardening with air quality monitoring. This DIY project not only adds greenery to your space but also helps you track environmental pollutants. Here’s a step-by-step guide to building your own:

Materials Needed:

- Wooden planks (cedar or redwood for durability)

- VOC sensor module (e.g., CCS811 or SGP30)

- Microcontroller (Arduino or Raspberry Pi)

- Waterproof sealant

- Screws, nails, and basic tools

- Soil and plants of your choice

Step 1: Build the Plant Box

Cut the wooden planks to your desired size and assemble them into a rectangular box. Secure the corners with screws and apply waterproof sealant to protect the wood from moisture.

Step 2: Install the VOC Detector

Mount the VOC sensor inside the plant box, preferably near the soil level where VOC emissions are highest. Connect it to the microcontroller and power source. Ensure the wiring is weatherproof.

Step 3: Program the Sensor

Use the microcontroller to program the VOC sensor for real-time air quality monitoring. You can display data on an LCD screen or send it to your smartphone via Bluetooth/Wi-Fi.

Step 4: Add Soil and Plants

Fill the box with nutrient-rich soil and plant your favorite flowers, herbs, or vegetables. The plants will naturally absorb some VOCs, enhancing air purification.

Step 5: Test and Maintain

Power up the system and test the VOC readings. Regularly check the sensor’s accuracy and maintain the plants to ensure optimal performance.

This project blends sustainability with technology, making it a perfect addition to eco-conscious gardens. Enjoy cleaner air and a greener space!