You know those bottle fillers at colleges and airfields? What if “youve had” one of those at home?
We know what you’re going to say:” My fridge has one of those !” Well ours doesn’t, and even if they are[ Chris Courses ‘] fridge did, his bottle of choice didn’t fit in the vertically-challenged water and sparkler hutch , nor did it fill autonomously. The solution was to build a dubiously placed, but nonetheless awesome custom bottle filler in his kitchen.
The plumbing that the proposed project couldn’t be more straight-forward: a 5-year undersink water filter, electronically actuated valve, some tubing, and a T to splice into the existing water line going to the fridge. Where the rubber stumbles the road is making this look nice.[ Chris] expends a good deal of time etching face illustrations, running resin as a diffuser, and announce processing. After miscarrying on one formulation of resin, the second achieves a neat gape, and the unit is heavily sanded, replenished, painted, cried over, and given the green light for installation.
For the electronics[ Chris] moved for a Raspberry Pi to monitor four buttons and exempt a precise allocation accommodated to each of his favorite drinking tanks. While the dispenser is at work, three rows of LEDs play an animated decoration. Where we begin to scratch our premiers is the demo below which shows there is no drain or drip tray below the dispenser — seems like the event of accidents waiting to happen.
Our remaining questions are about automating the top-off process. At first blush you might wonder why a sensor wasn’t included to shut off the filler automatically. But how would that work? The dispenser should create the high levels of the bottle and that’s a non-trivial task, perhaps best accomplished with computer vision or a CCD line sensor. How would you do it?
Read more: hackaday.com