17 Brew Crew Forum

Homebrewing Beer => Casking, Kegging & Bottling => Topic started by: combat32 on January 15, 2017, 03:46:49 PM

Title: Keg scales
Post by: combat32 on January 15, 2017, 03:46:49 PM
So I mentioned to my Brotherinlaw about never knowing when the keg is almost empty. So he took it on and is working on scales to monitor my kegs.
This is the prototype, each keg will have its own scale and it is monitored every 15 sec  it talks Wireless to the controller outside the fridge and I will be able to check it on my phone or webpage.
He said it's pretty close with in 1lb so he figured that's 1-2 beers left in the keg.
He is still tweaking the code. I will show it working once it's finished
(https://uploads.tapatalk-cdn.com/20170115/53c2e74637d0c771eedfcf6be345d15a.jpg)
Title: Re: Keg scales
Post by: Ohio Grassman on January 15, 2017, 04:55:42 PM
That's awesome, what a great idea!
Title: Re: Keg scales
Post by: DamoNinja on January 15, 2017, 05:10:26 PM
Cool stuff!

Here's an idea though, you'd be able to run multiple sets of scales right? You could keep the control unit separate and have an interface for each sensor array, that way one controller could manage multiple sets of scales?
Title: Re: Keg scales
Post by: combat32 on January 15, 2017, 08:20:48 PM
Cool stuff!

Here's an idea though, you'd be able to run multiple sets of scales right? You could keep the control unit separate and have an interface for each sensor array, that way one controller could manage multiple sets of scales?

you got it, each keg has its own scale setup with its own IRQ and then they all talk to the controller outside.
hope it works like he is planning  :) that would make my brewing plans easier to plan out. just kicked two kegs this weekend looks like a double brew day next weekend.
Title: Re: Keg scales
Post by: vic on January 15, 2017, 08:39:30 PM
What a cool idea. Good stuff mate. 17.
Title: Re: Keg scales
Post by: DamoNinja on January 15, 2017, 11:06:49 PM
Cool stuff!

Here's an idea though, you'd be able to run multiple sets of scales right? You could keep the control unit separate and have an interface for each sensor array, that way one controller could manage multiple sets of scales?

you got it, each keg has its own scale setup with its own IRQ and then they all talk to the controller outside.
hope it works like he is planning  :) that would make my brewing plans easier to plan out. just kicked two kegs this weekend looks like a double brew day next weekend.

Ah I just saw the arduino mounted to it, is your plan to fit one per scale and report back to something like a raspberry pi? Or is the arduino going to be the central component but is mounted here for now?

Whatever the deal - would love to see a build guide when complete!
Title: Re: Keg scales
Post by: 77Trev on January 16, 2017, 07:55:58 AM
thats pretty awesome!
Title: Re: Keg scales
Post by: combat32 on January 16, 2017, 08:12:23 AM
you nailed it again Damo! the arduinos report back to the main controller running Raspberry pi.
Im sure once its complete my brotherinlaw will share the programming.
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Title: Re: Keg scales
Post by: Black Dog Brewery on January 18, 2017, 07:42:45 PM
Words cannot describe what your Brother-in-law has created for you.

The Raspberry Pi is the foundation for nearly all of the projects in the teenage and college robotics clubs because these mini-computers are so universal to program inputs and their corresponding output functions.

He's a good choice for your sister!
Title: Re: Keg scales
Post by: combat32 on March 13, 2017, 10:31:22 AM
we just tested it out yesterday and it seems to be working very good.
poured a glass of beer should the weight dropped 8oz  :)
heres some pics
(https://uploads.tapatalk-cdn.com/20170313/534abe1d03c4998870ab1788a802619d.jpg)

(https://uploads.tapatalk-cdn.com/20170313/87afb28af267aeb673ef58cd629b204e.jpg)

This is his calculations table for battery life.
(https://uploads.tapatalk-cdn.com/20170313/26337e030ac7fcc7f52a678e3b4061be.jpg)
Title: Re: Keg scales
Post by: combat32 on March 13, 2017, 10:39:29 AM
he is going to start the Raspberry Pi controller next, now that we know its working.
getting excited now, that i will be able to know how much beer is left in each keg  :)
he said it can do 5 scales. but i can only use 4 in my kegerator, the small kegerator doesnt have enough room for the scale to be under it.
hes hoping to get almost a year out of the batteries on the scales.
i told him i can drill a hole in the back and get some power inside if needed.
cheers
Title: Re: Keg scales
Post by: Superduck on March 13, 2017, 04:25:51 PM
This is !@!@ awsome Combat, are bloody jealous.
I have a friend who is an electrical engineer and this is a favour I will definately call in and have him do. Way down the road that is.

Are you going to have it txt you some Kind of alarm message when your down to your couple last pints? thats what Id do.
Cant wait to see it all completed
Title: Re: Keg scales
Post by: combat32 on March 13, 2017, 05:54:44 PM
its going to have a webserver so i can check it from my phone or computer.
my brotherinlaw also said he can email me if there is a temp rise and when i start getting low.
like a reminder you need to brew!
he also is willing to share everything with you guys that are interested in trying it too.
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Title: Re: Keg scales
Post by: jstahnke10 on March 14, 2017, 04:25:40 PM
Lots of potential here. Great idea
Title: Re: Keg scales
Post by: combat32 on November 10, 2017, 08:19:25 PM
well its been awhile but my brotherinlaw is a busy guy, like the rest of us.
but tomorrow we are going to install it into the kegerator and do some live testing 8) good thing i just filled some kegs :)
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Title: Re: Keg scales
Post by: combat32 on November 11, 2017, 12:50:44 PM
Well we got one setup and running inside the kegerator. Here's a  pic of the website showing beer level
(https://uploads.tapatalk-cdn.com/20171111/0d77b797d2c073c58c9811abaa1657f8.jpg)

And the scale under the keg

(https://uploads.tapatalk-cdn.com/20171111/c25678e87c0f450c615af80d9916211f.jpg)
Title: Re: Keg scales
Post by: DrHans on November 12, 2017, 02:17:15 PM
Amazed!
Title: Re: Keg scales
Post by: Black Dog Brewery on November 13, 2017, 08:43:51 PM
That is so cool that he took it from simple strain gauges and a bread board circuit to a webserver !
Title: Re: Keg scales
Post by: Jaymcmlxx on November 14, 2017, 05:34:51 AM
Very cool sir.
Title: Re: Keg scales
Post by: combat32 on November 14, 2017, 08:00:18 AM
if any of you guys would like the information on how he did it, let me know.
he has kept schematics and instructions the whole time.
it can do up to 5 kegs
we are still testing the RF through the fridge and it seems to be working OK
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Title: Re: Keg scales
Post by: Black Dog Brewery on November 14, 2017, 09:07:03 PM
If any of you guys would like the information on how he did it, let me know.
he has kept schematics and instructions the whole time

Forget the schematics.

I'd rather buy the finished product after you guys appear on an episode of Shark Tank.

Seriously . . . This is nothing like I've ever seen before, and would probably have a huge market in in the pub / restaurant business where they need to better manage the inventory of their taps.
Title: Re: Keg scales
Post by: combat32 on November 15, 2017, 09:21:15 AM
I suggested to my Brotherinlaw to see if he could do a commercial to sell to homebrewers.
he thinks homebrewers wouldnt want to pay for something like this.
I told him if it can be done at a reasonable price they will buy it, a lot of the brewers are tech guys so this is right up their alley. plus any homebrewer wants to know how much beer is left in their kegs.
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Title: Re: Keg scales
Post by: 77Trev on November 29, 2017, 03:03:17 PM
Id be interested in the schematics and/or buying a couple if you do decided to build/sell.   This is awesome!!  Im always lifting the kegs to see if i can guess how much is left.

Plus...who doesn't want some electronics to play with!
Title: Re: Keg scales
Post by: Brew Beerymore on November 30, 2017, 06:56:12 AM
Tell him to consider submitting the project to https://www.kickstarter.com/ (https://www.kickstarter.com/)

My humble guess is that your BIL will ble blown away by what will then unfold.

If home brewers are willing to pay for pricey PH-meters, airlocks that measures SG and temp on the fly and hooks up to your WiFi, and 50 liter Speidel Brewmasters, they will pay for this.
Title: Re: Keg scales
Post by: combat32 on November 30, 2017, 08:52:55 AM
I will chat with him again on it.
drilling mounting holes in four more plates, so he can make 4 more for me so i can see the rest of my kegerator beers 8)
again if he doesnt he will share all the info
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