Arduino Nano + KTY84-150 temp sensor + standard RC servo + 6V BEC + threedee-printed parts = this video.
Before this when I initially adjust the right water temperature, it gets scorching hot by itself after 30 seconds and I have to readjust. Not anymore 
This contraption takes care of varying temperature from the hot water line and faucet valves changing due to change in temperature of the valve body and parts.
Post time: Jun-21-2017