This system automatically refills the water reservoir on your coffee maker.

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It all started one day when I was half asleep. I was getting my first cup of coffee and having to refill the water reservoir on my Keurig. I was thinking what a pain it is to constantly refill this thing. Everything else is automatic so why don't I automate the process.

I used an electric solenoid valve and a constant flow valve in series and a controller with a PIC12F100. You press a button on a membrane switch to start refilling and then you leave. It automatically shuts off based on time.

Originally, I was thinking about sensing the water level and shutting it off when the reservoir was full, but after testing it for three months, I realized that the constant flow valve works really well even though the incoming water pressure fluctuates.

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Michael Orona wrote 05/24/2017 at 07:25 point

What about using this ( with your solenoid? 

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Michael Hamilton wrote 05/12/2014 at 18:29 point
To build 1 is pretty expensive because the parts cost a lot when you only purchase 1. With kickstarter, I'm trying to purchase 1,000 units which brings the cost down to $25 each. This is much less expensive than buying the option through Keurig. See

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Samuel Wittman wrote 05/12/2014 at 16:56 point
How much did this cost, and was it any less than the added cost of buying the Keurig with this system already installed?

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Eric Evenchick wrote 05/12/2014 at 11:10 point
As someone who's had the exact same keurig at work, they are a pain to refill constantly.

What solenoid valve are you using, and is it food grade? I've looked for food grade valves before and they seemed hard to source.

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