I Have an old UV purifier, which had its motherboard burnt off, but i jerryrigged a system with basic adaptors and uv chokes to keep it running. It now gives water whenever its turned on. Which made mr lazy and i dont keep my water bottles filled anymore. which resulted in me drinking a lot less...
I have build an semi automatic water level controller using 555 in bi stable mode i.e. it will not turn ON automatically (one should have to press a button to start) but will turn OFF automatically when water level is high.So I have directly connect the VCC to PIN 2 through a push to OFF...