The Green Box was an idea that I had for a long time, and was able to make it into a reality this summer. I've always been interested in hydroponics because of its efficiency and environmental sustainability. 90% less water is used in hydroponics systems than in soil, no pesticides are needed (great for insects and ecosystems!), and nutrient broth can be created from compost! So, I got the idea to create a fully automated hydroponics system. The goal is to allow people to grow their own food with relatively 0 work and to promote sustainable living. The Green Box incorporates raft network hydroponics and sensors.
There are 3 main components to the system: temperature and humidity, water level, and light. Where I live, in Ho Chi Minh, the temperature can get too high, which dries up and kills plants. Therefore, using a temperature and humidity sensor and a fan, I programmed the system to turn on the fan when the temperature got too high. I also added a toggle switch to the control panel to manually turn the fan on and off. Then, for the water level, using a water level sensor, a solenoid valve, and the EZO-PMP water pump by Atlas Scientific, you can set it automatically at a certain water level, or manually input the desired water level. I made compost tea for the nutrient broth with my own vermicompost. Next, for the light system, using an ambient light sensor, when it got dark, the LED Lights would turn on, and turn off when the ambiance was light. I also added a toggle switch to the control panel to turn the light manually on and off.
I planted bok choi in locally produced coco coir and net pots.
It has been around a month since planting.
Great plant growth! Due to the lack of space, the plants grew to the side.
Beginning of green algal growth on roots and on bottom of the tank: