Category Archives: Projects

Reader Tip: RaspberryPints Digital Tap List – Step by Step Tutorial

‏Thanks to Twitter Follower @calebdann for this tip!  Connect with HBF on Twitter – Here

RaspberryPints Digital Tap List

Not too long ago, I posted this Raspberry Pi offering

Raspberry Pi Model B+ Basic Starter Kit

Raspberry Pi Model B+ Basic Starter Kit from Vilros.  Includes Raspberry Pi Model B+, Enclosure and Wireless Wi-Fi Adapter.

It can be used to put together a temperature controller, used for brew system automation and used in conjunction with RaspberryPints to display a digital tap list with or without flow meters to track pints served and beer remaining.

Raspberry Pi Model B+ Basic Starter Kit

In the original post I asked for info on homebrewing related builds utilizing the Raspberry Pi.

Caleb pointed me toward this step by step by step tutorial Github.  He used this to set up RaspberryPints digital tap list on his kegerator

The step by step is by Derek Berner.  Check it out – “nts” : Pints Without the Pi

Pinned: Kegerator · Growler Gold Box Deal · Raspberry Pi · Vanilla · Drip Tray:$24

Recent Amazon Finds:

10% Off the HBF Magnet Mounting Thingy? – YMMV

The HBF Magnet Mounting Thingy is designed to allow you to easily and accurately mount these magnets to this fan for use as a stir plate.  Read the Full Write Up.

The STL file is available for free if you have access to a 3D printer.  See the full write up for that file.

The magnet mounting aid is also available for purchase via Shapeways.  Check that out – Here

I purchased two of those myself.  At some point I went back to Shapeways and added several to my cart to see if shipping is flat rate (it does appear to be flat rate).  Anyway, I didn’t check out because I already have two on the way.  Within a day or two, I received this email offering me 10% off.

YMMV – Your mileage may vary on this one.  I’m not certain you’ll get the 10% off offer.  If you do want to try this, I would sign up for a Shapeways account first and then add the magnet mounting thingy to your cart.

Pinned: Kegerator · Growler Gold Box Deal · Raspberry Pi · Vanilla · Drip Tray:$24

Recent Great Deals:

10 EZ Lok Brass Inserts (for DIY Tap Handles)

Thanks to HBF Reader Brian for this tip!  There are 8 Ways to Connect with HBF

E-Z Lok Threaded Insert, Brass, Knife Thread, 3/8"-16 Internal Threads, 0.625" Length (Pack of 10)

10 Pack of EZ Lok Threaded Brass Inserts ( 3/8″-16, .625″ Length).  Brian indicates that these are the right size for making your own tap handles.  Check out this review for some additional information and insight.

E-Z Lok Threaded Insert, Brass, Knife Thread, 3/8″-16 Internal Threads, 0.625″ Length (Pack of 10)

Also consider the optional drive tool…
E-Z LOK Drive Tool – Optional – Use with 329-6, 329-601, 329-624, 303-6, 303-624, 319-6, 319-624, 335-6, 450-10, 550-6, 650-10, 650-10F, 453-10, 653-10, 653-10F, 400-6, 400-624

Pinned: Kegerator · Growler Gold Box Deal · Raspberry Pi · Vanilla · Drip Tray:$24

Recent Amazon Finds:

Homebrew Finds Magnet Mounting Thingy… Available for Sale on Shapeways!

Homebrew Finds Magnet Mounting Thingy

The HBF Magnet Mounting Thingy is designed to allow you to easily and accurately mount these magnets to this fan for use as a stir plate.  Read the Full Write Up.

I had several people contact me about purchasing one of these or otherwise making them available publicly.  Note that I’m already providing the STL file for free to those of you with access to a 3D printer.  See the full write up for that file.

A serendipitous reading of an article about a legal controversy regarding a 3D printed “Left Shark” led me to 3D vendor… shapeways.  As always… thanks go to “Left Shark” :)

Shapeways, prints and delivers 3D creations.  Whammo.

The HBF Magnet Mounting Thingy is now available on Shapeways.  It’s available in white and black.  White material cost is $1 lower.  I ordered a copy and will see how it turns out.

Check it out – Here

DIY Stir PlateHere is a test of 1.6 Liters of water in a 2 Liter Flask – More about the Magnet Mounting Thingy

BYKES 10 Neodymium Super Strong Extremly Powerful Rare Earth Refrigerator Magnets 1/2 x 1/8 Inch Disc N48

SEOH Magnetic Stir Bar Plain PTFE 6 x 25mm New

XYZprinting Da Vinci 1.0 3D Printer

Stir Plate Magnet Mounting-Thingy STL files on thingiverse

Pinned: Kegerator · Growler Gold Box Deal · Raspberry Pi · Vanilla · Drip Tray:$24

Recent Great Deals:

3D Printed Stir Plate Magnet Mounting-Thingy! with Videos

3D Printed Stir Plate

You probably know that since getting my XYZPrinting Da Vinci 3D Printer I’ve been on a quest to come up with a 3D printed stir plate design.  Note that these projects are certainly already out there (including designs specifically for mounting magnets on fans), but these designs are typically – “here’s what I put together with stuff around my house”.  That’s great, but it’s hard to nail down what works with what.  My goal was to use use known part numbers and a set procedure to come up with an effective design.

Well… I’m not done yet.  I am working with Brandon, a very talented Engineer (and HBF Reader!), on the larger project.

But… I can tell you that I’ve come up with a pretty amazing magnet mount, magnet, stir bar and fan combo.

First, the fan…

AC Infinity AI-120SCX Speed Control Fan Kit for Cabinet Cooling, Single 120mm

I sourced this specific cooling fan for the project.  I like this model because… 1. It’s a good size (4.7″ square), 2. Is already wired for AC and, 3. Includes a variable speed function.

AC Infinity AI-120SCX Speed Control Fan Kit for Cabinet Cooling, Single 120mm

Printing the Magnet Mounting-Thingy…

3D Printed Stir PlateHere it is printing on my XYZprinting Da Vinci 1.0 3D Printer – check below for links to the STL file on thingiverse.

3D Printed Stir PlateHere is the completed Magnet-mounting-thingy!

3D Printed Stir PlateA close up of the finished piece.  I tried several designs.  Magnet alignment is an important part of stir plate design.  Uneven or mis-spaced magnets mean easily thrown stir bars.  That’s not good.  I figured that out on my own, trying to place magnets isn’t fun.  They don’t want to cooperate.  This piece helps mount magnets and do so easily.  I decided on the hole in the middle because the fan I purchased has a dimple in the exact center.  The magnets are centered and held in place here and alignment on the fan is as easy as lining up the dot in the center of the circle.  Note that the two spots for magnets are designed to work with these specific 1/2″ by 1/8″ neodymium magnets.

Although I have Solidworks, I’m still new to 3D designing.  I designed this piece in the free version of SketchUp.

Magnets and Magnet Alignment…

BYKES 10 Neodymium Super Strong Extremly Powerful Rare Earth Refrigerator Magnets 1/2 x 1/8 Inch Disc N48About the magnets… I tried three different sizes of magnets.  I was about to go with a smaller size that worked okay, but decided I wasn’t happy with their performance.  Yes they did work on a moderately sized starter.  But, I just wanted more holding power.  I didn’t want to have to struggle with thrown stir bars.  I decided on these 1/2″ by 1/8″ Neodymimum Rare Earth Magnets.  If any magic exists in this design… certainly a good bit of it comes from these magnets.  The alignment and fan are both huge parts to the puzzle.  But the power of these magnets is central.

Note: Be careful with these magnets.  Read the warning on the box and always follow manufacturer’s instructions.  Take special care when using these around each other and around metal in general.

Stir Plate Magnet AlignmentYou want to line your magnets up so that the polarity is in agreement.  I’ve done this a few times now, not always successfully I might add.  Now, I start by putting the magnet on a stir bar.  Get it placed so everything is nice and happy.  I put this on Ritebrew’s Tasting Paddle.  I’m working on my deep freeze here and the magnet would prefer to make friends with the deep freeze vs the stir bar.  The tasting paddle helps.  Note that here and throughout these tests, I’m using this 6 x 25 mm Stir Bar.

Stir Plate Magnet PlacementNow take the stir bar and magnet combo and place it into the holder.

Stir Plate MagnetsWhen you’re comfortable with positioning, glue the first magnet down.  I’ve been using Gorilla’s Super Glue.  Wait for that first magnet to set up.  It’s worth noting that the individual magnet holders are tight enough (at least for me) for this specific magnet to hold them, at least temporarily, in place while you play around with positioning.

Stir Plate MagnetsNext, I take the other magnet and move it close to where it needs to go.  See how the stir bar has moved to the side?  That’s because the polarity was incorrect.  The stir bar was repelled.  Rotate the magnet around until the stir bar is attracted and you’ve found the correct position.

Stir plate magnet orientationHere, I’ve found the correct orientation for both magnets and the stir bar is attaching perfectly.  Glue the second magnet into place and wait for it to set up.

Mounting the Mounting-Thingy on the fan…

DIY Stir PlateNotice the dimple in the middle of this fan.  Disregard the scuffing on this.  I’ve tried a bunch of things with this fan.  The fact that it’s still working well after the paces I’ve put it through is a testament to it’s hardiness.

DIY Stir PlateAdd some glue and line up the dimple in the center section and whammo you’re lined up and installed.

DIY 3D Stir Plate Home BrewingInstalled and aligned correctly using the center circle as a guide

Stir PlateWith a temporary top installed.  Note that the actual enclosure for this stir plate is a work in progress.  This is a temporary platform and will not be the final design.

Tests…

With some stir plates, it’s necessary to move the flask around a bit (with the stir bar in it) to train up the stir bar on the stir plates magnets.  Not necessary with this design.  Drop the stir bar in and the two immediately find each other.

DIY Stir PlateHere is a test of 1.6 Liters of water in a 2 Liter Flask

1.6 Liter StarterHere’s another picture of of the same test.  This is vigorous and violent.  It’s worth noting that this magnet/spacing/stir bar combination doesn’t throw stir bars (at least in my tests) even at top speed.

Here’s a video of the 1.6 Liter Test

5L Stir PlateThis setup is entirely capable of holding a 5 liter Erlenemeyer and stirring large starters.  Here is a beautiful vortex in a 4 Liter flask of water.

A video of the 4L Test

5 Liter StarterHow about a full 5 Liter starter?  Yup!

I’m very happy with these results.  Look for a complete design in the near future.  I also plan to develop a non-3D version at some point.  The fundamentals of this hold true however they are put together… the fan, magnets and magnet positions are winners.  Want to work with me on the traditional design?  Send me an email.

BYKES 10 Neodymium Super Strong Extremly Powerful Rare Earth Refrigerator Magnets 1/2 x 1/8 Inch Disc N48

SEOH Magnetic Stir Bar Plain PTFE 6 x 25mm New

XYZprinting Da Vinci 1.0 3D Printer

Stir Plate Magnet Mounting-Thingy STL files on thingiverse

Update: HBF Magnet Mounting Thingy now available for purchase on Shapeways

Pinned: Kegerator · Growler Gold Box Deal · Raspberry Pi · Vanilla · Drip Tray:$24

Recent Great Deals:

First Looks: Variable Speed AC Fan for DIY Stir Plate or Kegerator Circulation

img_img_7320Fan with included AC Wiring and Variable Speed Control.

I picked this cooling fan up primarily to put together a Stir Plate design that works with it.  I chose this model because… 1. It’s a good size (4.7″ square), 2. Is already wired for AC and, 3. Includes a variable speed function.

AC Infinity AI-120SCX Speed Control Fan Kit for Cabinet Cooling, Single 120mm

Here’s a first look…

DIY Homebrew Yeast Stir PlateFront of the Fan

DIY Homebrew Yeast Stir PlateBack of the fan.  This side actually rotates.  If you were looking to put together a stir plate, this is the side you’d put the magnet on.

DIY Homebrew Yeast Stir PlateHere’s where the AC wire plugs in.

DIY Homebrew Yeast Stir PlateThis shows the AC wire plugged in.

DIY Homebrew Yeast Stir PlateThe specs say this is 4.7″ square.  From side to side, I get 4 11/16″.  As you’ll see it’s large enough to hold a 5 Liter Erlenmeyer.

DIY Homebrew Yeast Stir PlateI’d call this just a hair under 1″ thick

DIY Homebrew Yeast Stir PlateFor size reference, with a 2L Erlenmeyer in the background.

DIY Homebrew Yeast Stir PlateWith a 2L Erlenmeyer on Top.

DIY Homebrew Yeast Stir PlateThis thing is all but begging to become a stir plate.  I put four of these rubber bumpers in the four corners (to hold the erlenmeyer in place and give it a little bit of clearance) and then put four of these magnets in the center.  Those just stuck on there with magnetic force and they ended up deciding to stack themselves two high.  It’s kind of hard to tell with this photo, but this is a 5L Erlenmeyer Flask with 2L of water with a vortex using that setup.  I’m not suggesting this as a final design.  I’m only that this fan is a great candidate for conversion.

DIY Homebrew Yeast Stir PlateThis photo shows the magnet/rubber bumper setup

I use a similar fan for recirculating air in my kegerator.  See: Kegerator Beer Line Temperatures & Reducing Foam with a Recirculating Fan

AC Infinity AI-120SCX Speed Control Fan Kit for Cabinet Cooling, Single 120mm

SEOH 2L Narrow Mouth Erlenmeyer Flask with Heavy Duty Rim 1/pk

Erlenmeyer Flask (5000 ml) Y450

Also Consider:

Pinned: Kegerator · Growler Gold Box Deal · Raspberry Pi · Vanilla · Drip Tray:$24

Recent Amazon Finds:

3D Printed Pub Style Tap Handle

75per_img_7266

I recently got an XYZprinting Da Vinci 3D Printer.  I think 3D Printing has a bunch of possible applications for homebrewing.  From tap handles to stir plates and on and on.

Here’s a look at a 3D printed Pub Style Tap Handle designed by “InfiniTTTy” and available on thingiverse.  A link to the STL files and project description can be found below.

3D Printed Tap HandleI printed this on my XYZprinting Da Vinci 1.0 3D Printer.  Here’s a look toward the beginning of the process.

3D Printed Tap HandleMaybe halfway through

3D Printed Tap HandleTa Da… Printed Thing!  I printed this on the Da Vinci’s Best Setting.  It took about 3 hours.

3D Printed Tap HandleThis also gets a decorative cap on the top.  You can, of course, print either of these pieces in your choice of colors.  The color is based on what color filament you’re using.

3D Printed Tap HandleFinished product.   The bottoms on these end up with a little extra material that needs trimmed.  I’ve been doing that with a utility knife.  The one thing I would change for this build would be… get a sharper utility knife.  Mine was too dull.  I could have ended up with cleaner lines with a sharper knife.  It’s amazing to me that I printed this.

3D Printed Tap HandleI attached the top piece on with Gorilla‘s Gorilla Super Glue.  Gorilla makes some stellar products including Gorilla Duct Tape.  I don’t consider it patched when using that.. I consider it permanently fixed… :)

75per_img_7266For size comparison.  From left to right Dry Erase Board Tap Handle, 3d Printed Pub Style Handle, Standard Black Faucet Handle

3D Printed Tap Handle WeightUpdate:  Google+ Friend Ray asked about material cost.  Great question.  I pulled out my AWS-100 Digital Gram Scale – Review – and weighed it up.  It came out to 26.34 grams.  At the current cost for filament (as of 1-15-15) this figures out to about $1.23 in filament.

75per_img_7300Installed.  Just served a RiteBrew Oatmeal Stout

75per_img_7286

This is a nice little tap handle.  I did some pulling and bending on it and it held together just fine.  One of the commenters on the thingiverse page indicates that they have been using it for two years.  Other styles of tap handles are available on thingiverse.  Of course, if you don’t find what you like you can always… make it.

XYZprinting Da Vinci 1.0 3D Printer – Filament

Pub Style Tap Handle by InfiniTTTy on thingiverse

Pinned: Kegerator · Growler Gold Box Deal · Raspberry Pi · Vanilla · Drip Tray:$24

Recent Amazon Finds: