$ 0 0 This is a home made water proof switch for use on a demand fish feeder. It might not make much sense on it's own, but its part of an ongoing open source project. For the full story go to ... 120thingsin20years.blogspot.comImage may be NSFW. Clik here to view. Image may be NSFW. Clik here to view. Image may be NSFW. Clik here to view. Tags: Electronics aquaponics fish fish feeder demand fish feeder automatic fish feeder