Home Brew Forums > Home Brewing Beer > DIY Projects > Kegerators and Keezers > [Feeler] Any Interest in Digital Tap Lists?
Reply
 
Thread Tools
Old 01-19-2014, 06:31 PM   #401
rabeb25
Feedback Score: 1 reviews
Recipes 
 
Join Date: Jan 2009
Location: Albertville MN
Posts: 380
Liked 30 Times on 20 Posts
Likes Given: 3

Default

Sorry default to 0oz poured, or have a full keg. However you want to look at it.


rabeb25 is offline
 
Reply With Quote
Old 01-19-2014, 07:02 PM   #402
thadius856
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
thadius856's Avatar
Recipes 
 
Join Date: Dec 2012
Location: Marysville
Posts: 2,277
Liked 666 Times on 260 Posts
Likes Given: 155

Default

Oh. The keg column is placeholder for the flow meters.

Flow meters won't be incorporated until at least v2.0.0.

You can manually update the SQL database. But I'd recommend you just turn the column off altogether.


__________________
Was this post helpful? Don't forget to click 'Like'!

Thadius Miller, Project Manager -> RaspberryPints

Before you build a keezer, look at this!
Chest Freezer Spec Sheets and Layout Drawings (15 models and counting)
thadius856 is offline
 
Reply With Quote
Old 01-19-2014, 10:52 PM   #403
thadius856
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
thadius856's Avatar
Recipes 
 
Join Date: Dec 2012
Location: Marysville
Posts: 2,277
Liked 666 Times on 260 Posts
Likes Given: 155

Default

On my way into town this morning, I stopped by Walmart to return an old truck battery. Found this:



I figured, "well ****, if a redneck can make a bacon bowl, I can certainly solder!"

Went down to Radio Shack, picked up some goodies. Namely:

62/36/2 Rosin-core Solder (1.5 oz roll)
Desoldering Vacuum Bulb
Misc project wire
A 500-pack of assorted resistors (they didn't have any 270 ohm loose)
A rigid jumper wire kit for breadboards

Haven't soldered in over 10 years, since I had to build an FM transmitter to retrofit an RC aircraft. Watched a quick refresher video to re-familiarize myself with the finer points of soldering:

Jumped right in, using only a scrap piece of cardboard, soldering station and wet sponge. I don't think my results are professional-grade, but they look like they'll get the job done.

Parts from the kit:

Instructions from the kit: http://openmicros.org/index.php/arti...3-slice-of-pio

First row of the IC socket done (soupy looking stuff is rosin that hasn't dried yet):



IC socket completed, plus the two 8-port ground headers (top row) and two 8-port I/O headers (second row). The capacitor at bottom was certainly the hardest joint. I know it looks like I bridged there, but it's just the viewing angle. There's a pretty decent gap between them.



GPIO header soldered on (bottom right rows), MCP23017 read to snap in.



Total build time was about 45 minutes. Would have been much shorter, but I was taking my sweet time.

Lessons learned:

If you're buying solder, grab .032" instead. With .022", the feed rate was pretty fast. Hard to stay steady at that rate.

Bend the capacitor pins to hold it in place. Don't fight with gravity while trying to solder.

My iron came with an ST2 tip. It was larger than most of the pads on this project. I would have felt much more comfortable with an ST1 tip or even smaller.
__________________
Was this post helpful? Don't forget to click 'Like'!

Thadius Miller, Project Manager -> RaspberryPints

Before you build a keezer, look at this!
Chest Freezer Spec Sheets and Layout Drawings (15 models and counting)
thadius856 is offline
skemp45 Likes This 
Reply With Quote
Old 01-20-2014, 02:10 AM   #404
thadius856
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
thadius856's Avatar
Recipes 
 
Join Date: Dec 2012
Location: Marysville
Posts: 2,277
Liked 666 Times on 260 Posts
Likes Given: 155

Default

So, I have the Pi and a breakout board built. I have a breadboard and wires. I should have everything I need.

Yet the longer I sit here fiddling with bits of wire, the more I realize:

__________________
Was this post helpful? Don't forget to click 'Like'!

Thadius Miller, Project Manager -> RaspberryPints

Before you build a keezer, look at this!
Chest Freezer Spec Sheets and Layout Drawings (15 models and counting)
thadius856 is offline
4
People Like This 
Reply With Quote
Old 01-20-2014, 02:58 AM   #405
skemp45
HBT_SUPPORTER.png
Feedback Score: 2 reviews
Recipes 
 
Join Date: Mar 2013
Location: Scottsdale, Arizona
Posts: 248
Liked 36 Times on 27 Posts
Likes Given: 180

Default

Quote:
Originally Posted by thadius856 View Post
So, I have the Pi and a breakout board built. I have a breadboard and wires. I should have everything I need.

Yet the longer I sit here fiddling with bits of wire, the more I realize:

Hahahaah my god man, I about lost it on that meme lulz
__________________
Shawn Kemp, Application Developer and Web Engineering -> RaspberryPints
_______________________________________________
Be Creative, Challenge the beer industry. You can do all of this, as the world and beer industry was made by people who are no smarter than you.
skemp45 is offline
 
Reply With Quote
Old 01-20-2014, 04:54 AM   #406
thadius856
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
thadius856's Avatar
Recipes 
 
Join Date: Dec 2012
Location: Marysville
Posts: 2,277
Liked 666 Times on 260 Posts
Likes Given: 155

Default

Figured out the wiring. Really wasn't all that bad.

Set the Pi up for I2C, Python, etc. Found a sample script that looks like it should listen for the tap handle opening once, and I can mod the heck out of it for our purposes.

Problem is, it keeps throwing Python errors at me. Hopefully somebody on the offical RPi forums will give me a reply so I can move forward. :\
__________________
Was this post helpful? Don't forget to click 'Like'!

Thadius Miller, Project Manager -> RaspberryPints

Before you build a keezer, look at this!
Chest Freezer Spec Sheets and Layout Drawings (15 models and counting)
thadius856 is offline
 
Reply With Quote
Old 01-20-2014, 07:05 AM   #407
AgentHubcap
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2011
Location: Hillsboro, Oregon
Posts: 490
Liked 32 Times on 27 Posts
Likes Given: 23

Default

My first night of actually testing the flow meter code was hugely disappointing. In the end, I've decided that I'm trying to walk before I can run. I'm going to pick up a multimeter tomorrow to make sure that I've wired the flow meter right, then actually connect it to the pi. I think I'm close, though.
AgentHubcap is offline
 
Reply With Quote
Old 01-20-2014, 02:28 PM   #408
bad coffee
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
bad coffee's Avatar
Recipes 
 
Join Date: Jun 2008
Location: NYC
Posts: 4,842
Liked 447 Times on 440 Posts
Likes Given: 48

Default

Thought this was appropriate here:

http://xkcd.com/1319/
__________________
Quote:
Originally Posted by GilaMinumBeer
Why do you think they choose that path? (.)(.) = $$$$$$$$$
Quote:
Originally Posted by Zuljin View Post
Wtf was chasing you for an hour? Buy a gun already.
Quote:
Originally Posted by AZ_IPA View Post
I'm a meat hunter. PKU.
bad coffee is offline
2
People Like This 
Reply With Quote
Old 01-21-2014, 03:29 AM   #409
mcangeli
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2012
Posts: 383
Liked 53 Times on 45 Posts
Likes Given: 98

Default

Take a look at the adafruit kegomatic project. It looks like they took the kegbot and made it run on just the rPi with the flowmeter...

http://learn.adafruit.com/adafruit-k...pberry-pi-code

https://github.com/adafruit/Kegomatic

Granted, all they're doing at this point in time is posting to twitter... but the flowmeter.py file is pretty good for reading the flowmeters.
mcangeli is offline
 
Reply With Quote
Old 01-21-2014, 03:42 AM   #410
thadius856
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
thadius856's Avatar
Recipes 
 
Join Date: Dec 2012
Location: Marysville
Posts: 2,277
Liked 666 Times on 260 Posts
Likes Given: 155

Default

Mmmmm, yes. Looking at flowmeter.py, looks like they don't actually do any GPIO there. Just number crunching the pulse data.

Looks like they import flowmeter.py into kegomatic.py, where the GPIO actually takes place. How, I'm not entirely sure. I can barely read Python at this point, let alone tweak it up.

The article's an interesting read. Good stuff in there. I may have to try wiring direct to the Pi's GPIO pins (conditioned to 3V3 of course) and see if I can get this to run. Then, hopefully a switch from GPIO.RPi to I2C wouldn't be too difficult.

Alternatively, I can attempt to learn enough C to utilize wiringPi.

Neither option sounds terribly fun. :\


__________________
Was this post helpful? Don't forget to click 'Like'!

Thadius Miller, Project Manager -> RaspberryPints

Before you build a keezer, look at this!
Chest Freezer Spec Sheets and Layout Drawings (15 models and counting)
thadius856 is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
New Hampshire PBW by the lb (Feeler to gauge interest) radiant-designer For Sale 12 08-20-2013 03:44 AM
Rolling Stone best of lists hoppyhoppyhippo General Chit Chat 5 02-09-2013 04:39 AM
Bottling Day Check Lists? Katnip Beginners Beer Brewing Forum 2 04-28-2012 05:12 AM
Christmas lists Matty22 General Beer Discussion 40 11-11-2011 04:42 AM
I need master lists of ingredients TxBrew Recipes/Ingredients 4 01-31-2007 09:41 PM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS