You know those bottle fillers at schools and airports? What if you 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 though[ Chris Courses ‘] fridge did, his bottle of preference didn’t fit in the vertically-challenged water and frost hutch , nor did it fill autonomously. The answer was to build a dubiously placed, but nonetheless awesome custom bottle filler in his kitchen.
The plumbing for the 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] devotes a great deal of hour etching face illustrations, moving resin as a diffuser, and pole processing. After failing on one formulation of resin, the second achieves a neat examine, and the unit is heavily sanded, filled, coated, prayed over, and given the green light for installation.
For the electronics[ Chris] exited for a Raspberry Pi to monitor four buttons and dispense a precise allocation tailored to each of his favorite boozing drums. While the dispenser is at work, three sequences of LEDs play an animated pattern. Where we begin to scratch our tops 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 needs to establish 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