Cai Thia (Bok Choy) and Xa Lach (Lettuce) Babies!
The Green Box was an idea that I had for a long time, and was able to make 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 a desired water level. I made compost tea for the nutrient broth with my own vermi-compost. 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 ambience was light. I also added a toggle switch to the control panel to turn the light manually on and off.
I planted Cai Thia (Bok Choy) and Xa Lach (lettuce) 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 tank: