Brewbot V2.0 Upgrades :)
Pressing bottom of Kettle down to fit filter and nearly eliminating losses
Upgade to a 50' 1/2" immersion "Double Helix" chiller
Upgade to a 10" LCD touchscreen control interface
240V SSR's, GFIC and receptacles relocated with cooling fan duct
100% stainless steel construction
Disassemble-able for easy cleaning
April 2013 - 20 gallon Kettle Build
After exploring options, the best option to save some money and to get a larger boil volume was to purchase a second pot and weld the sides to the first pot essentially making it twice the height. This decision was largely influenced by the original pot already ready to go with element, filter, sensor. Also I happen to do a little TIG welding at work and the equipment was available.
Here are some photos of the build so far. Its not yet polished or anodized, but it holds 20 gallons and the filter area is pressed down so there is minimal loss.
The weld below is still in its post welding state and has not yet been cleaned or polished.
The bottom two photos are of my new 50' 1/2" immersion chiller built with a dual helix design. No fittings were used in the kettle, just a thoughtful bending process. brass quick disconnects from Rona are soldered to the 1/2" tube on the outlet and a whirlpool return line is plumbed in the middle. More pics to come :)
April 2013 - Out with old shelf, in with new
The brewery is still located in the same location as previous situated right next to the washer / dryer, but the control panel is now much more accessible and it has a much cleaner look.
Official Logo :)
or just raspberry pi brewing controller :)
Control Box Rebuilding
Feb - March 2013 - Wiring the Controller
Turns out wiring a controller with 18, 5 pin connectors, 12, 4 pin connectors and 12, 3 pin connectors plus all the internal wiring between components, relays, switches and screens is a lot of work. Here's a photo of the current state of the beast.
The lower part is a bit of a mess, will be cleaned up before the final bit is finished.
Jan 2013 - Brewbot with a Raspberry Pi interface
more to come
LED illuminated rocker switches
DC motor controller
10" LCD touchscreen
Arduino 128k Mega microcontroller
Miscellaneous Wiring parts
$34 (for two boards)
$65 for 50 sets of connectors
$40 for 20 switches
$5 for a dual channel controller
Dec 2012 - Control Panel Configuration Finalized
Click on the image for a larger view.
Hopefully I will have a comparison photo of the actual assembly early in the new year :)
Dec 2012 - LCD touchscreen for Raspberry Pi Ordered :)
Was relatively expensive at $180 shipped, especially compared to the cost of the Pi. But it will provide a good looking interface that will hopefully be used for years and many projects
Going to install this screen into the front panel of the new control box
Will hopefully recieve in January 2013 so come back for updates :)
May seem like a simple achievement, but going from control box, wires and mini-XLR connectors to having connector cords, and matching ends installed into the box is quite a lot of work. Each connector has between 3 to 5 connections pending whether its a temperature sensor, pressure sensor, AC or DC motor etc..... These 3 to 5 connections has to be soldered on both sides of the connector then individually and communally heatshrinked. The holes being drilled in the box at this controlled spacing required a CAD printout and were punched prior to drilling. A step drill was used to make the holes and then the time consuming process of deburring the holes needed to be done. All in all, 39 holes were drilled and cle
I chose mini-XLR style connectors because they were some of the cheapest and well made connectors I could get that also fit my size constraint. I have planned on over 40 different connections to various components of the brewery so to fit everything onto one panel is tricky. This seller I contacted on ebay allowed me to purchase 50 sets of connectors but mix them so I recieved 20 sets of 5 pin, 20 sets of 4 pin and 20 sets of 3 pin. This way I can run all my 5V devices (temp sensors, pressure sensors and limit switches) on 5 pin, all my 12V devices on 4 pin (pumps), and my 120V AC devices on 3 pin (mash stir motors, exaust fans). This ensures that no device can be plugged into a port not designed for the voltage of the device. The link I purchased the connectors can be found here
Nov 2012 - Arduino Interfaced DC motor controller L298N
With a motor controller which varies the supply voltage, I can eliminate both valves from my system. This will allow me to run the motor at any speed I wish. At times I have had problems with stuck mashes as my recirculation pump sucks too hard on the bottom of the mash tun. This controller will help me avoid this problem.
The Arduino will use two of its pwm outputs to communicate with this controller, telling it to vary its ouput voltage from 0V to the supply voltage of this controller.
Using some clever CAD locating, I was able to move both high power SSR's, the 40A ground fault interrupting switch, all three locking connectors and the cooling fan into the lower third of this control box. I plan on creating a partition just above these components, essentially making a cooling tunnel moving air from one side of the box to the other. This will ensure none of these devices will overheat :)
Upgraded Hop Filter
- So the first design requirement for this second filter was to be as convenient to disassemble as the first filter, but be lower in profile. My old filter would leave at least a liter or two of wort behind in the kettle because the filter was so tall (it was easier to suck air down into the filter than it was to pull the last inch or two of wort from the sides of the filter).
- So the second requirement was the filter had to be pretty low profile (as flat as possible) to minimize losses.
- Third; it had to be all stainless steel. Below is what I came up with.
The frames are 1/4" high pressure SS tubing (lots in the scrap bins at work), the mesh was a #30 x 0.013" sizing and I pulled and sewed the edges as can be seen in the first photo below. The Inlet tube was a 1/2" SS tube which I threaded with a 1/2"-18 thread onto a SS plate on the inside to hold the tube into the filter. This SS plate is bent slightly to keep the bottom of the filter off of the inlet tube. I also bent some SS welding wire into some clamps to hold the filter together. The whole filter assembly is 1/2" tall when it is laying flat on the kettle bottom and cost $12.58 for the SS mesh (all other parts and tube I had laying around in the scrap bin @ work :)