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    Water flow warning light

    Water flow warning light

    This small gadget uses the water flowing in a pipe or hose to generate electricity to light a small LED to warn that water is being used. We have had a few incidents of forgetting the tap on while it soaks the capillary matting and flooding the garden propagator. The light meant that one can see from a distance that water is flowing. Of course one can change the LED to a small flashing beacon, siren etc. The water generator generates 12v at 3.5w which powers the light. It is a small challenge to change the current to a suitable one for the LED. I managed to convert it using a small 3v voltage regulator and connecting it to a bicycle light. I would have liked it to flash but didn't manage it. I like this gadget because there is no need for sensors or sophisticated switches, it is the use of water which makes the warning light go on. I was also very happy to find these in-line electrical hydro generators. This is my first Farm Hack tool, so feel free to contact me if I am missing any information.