Water level sensor bracket for self watering christmas tree!

thingiverse

Here's a part of an automatic Christmas tree watering device that I built with an Arduino Uno, a relay module, 2 water level floating sensors and a submersible pump. This bracket mounts two float sensors at slightly different heights. The first float measures the low water level, while the second one measures the high water level. When the low-level sensor is triggered, the Arduino code enables the pump until the high-level sensor is triggered. Essentially, it keeps the water level between the high and low levels at the base of the Christmas tree. One important note: The tube from the pump to the base of the Christmas tree should have a small hole in it to allow air into the line. Otherwise, when you turn on the pump, it will create a siphon and overfill the Christmas tree. By adding a hole to the supply line tubing, some air is allowed in when the pump is turned off, breaking the vacuum that causes the siphon. Enjoy! Bill of Materials: 1 submersible water pump Tubing (connects pump in reservoir tank to bottom of Christmas tree) 5-gallon bucket (acts as the reservoir tank) 1 Arduino Uno 1 relay module 2 float sensors (I used these: https://www.amazon.com/QX-Electronics-Switch-Plastic-Arduino/dp/B07252VQCM) I also used this case for my Arduino; it seemed to work well. https://www.thingiverse.com/thing:2163844