3.3.3 - DIY Humidifier Water Refill System

This design is part of my Mushroom Grow Tent (Martha Project).
https://www.printables.com/de/model/968799-300-grow-tent-for-mushrooms-overview

-------------------------

Welcome to my latest DIY project where I'll be showing you how to create an automatic water refill system for your mushroom cultivation setup. This system is incredibly cheap and easy to assemble, and it works perfectly with a 12V water pump or an electronic water valve.

The refill system has been designed to be used in conjunction with my DIY mushroom tek components, particularly my humidifier. The benefits of this system are numerous, including the ability to leave the humidifier working for longer periods, such as during the holiday season when you need a larger water tank.

In this teaser video, I'll give you a sneak peek into the system's functionality, but I'm currently working on the complete video documentation.
I hope you enjoy this project and find it useful for your mushroom growing needs. Stay tuned for the full video, and happy mushrooming!

Here you will find the .pdf script for printing and offline use!
https://drive.google.com/drive/folders/1B2OIvdmnxRqS1MRcuJaII8CSyUZvPqu5?usp=sharing

12V Micro DC Water Pump Food Grade Water Dispenser 370 Mini Pump 12 volt 0.7-1.2L/min Low Noise Long Life Self-priming Pump
https://de.aliexpress.com/item/1005002863109224.html

Update: FMEA - 2024-06-15
It's possible that the water tank could be emptied by the pump because if the floating switch or the moisture sensor fails to close, the controller will keep the pump running. The system won't know that the tank is empty. This could happen when you are away, and the person who should refill the water doesn't do their job, or you have a sensor malfunction, or something else unexpected occurs. To avoid taking chances, you can use a time relay that will disable the pump after a certain amount of time. Another approach is to just let the pump run continuously. To assess the risk involved in having the pump running 24/7, I conducted a small experiment. I placed the pump on a wooden piece and let it run. I let it run for about 5 days, unplugging it whenever I was not home, so this is not a true 24/7 test. But for the time it was running and pumping air, it did not heat up, and the plastic components also did not show any signs of degradation. I used the pump afterwards, and it still worked as usual. As with everything you learn from the internet—do your own research. For me, the test was significant enough to trust the pump.
https://youtube.com/shorts/myiQaPzl6Kw