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No, all the logic is in the backend, the last thing I want is to lose a recipe or state because I refreshed the page right? All of the getting and setting is done via APIs, but I'm not sure if they'd be RESTful strictly speaking. For your friend, I'd recommend the $25 for a raspberry pi and...

I didn't post it because it's ugly, but since you asked... I've got to reroute stuff to be a little neater obviously. I'd also like to get away from using a hard drive if I can help it. I used the 10" monitor from here...

The solenoid valves are just the gas valves in the back and the water in valve. Those are from valves4projects on ebay. The rest of the valves, the blue boxes are automatic ball valves, they don't clog like a solenoid valve might. Those I got from oscsys.com, but they're Chinese so you might be...

Heh, hopefully it'll come in handy later, it's not wasted money it a future partially funded project. The picture shows two red wires that are equivalent. That's so you can detect the inherent resistance in the wires in your circuit and subtract it from the observed resistance the RTD...

Yes, I've seen that one and am considering it. BeagleBoards had been expensive, but this one is very comparable in price to the pi and is faster and has more GPIOs which means I can possibly get rid of the Arduino I'm using as well.

I'd recommend the wheels from Harbor Freight for what we're using them for. HF wheels are much cheaper and although they're not as good they'll be fine unless we start racing these things.

Great job. Now to get some beer out of it! Be careful. I ended up with 20 gallons in the garage in just a couple weeks.

The DS18B20s aren't RTDs. They're ICs that use the 1 wire protocol. Each chip has a separate address and they're all connected to the same data pin on your microcontroller. They don't provide a change in voltage or resistance or anything with temperature. I use them and highly recommend them...

What about them was rubbish? Mine all worked exactly the way I'd expect. Am I lucky or are we expecting different things?

I've been learning/using Eagle as well to design board for this and other projects and mill them on my CNC mill. Here's my first attempt at making a board for this project.

Is there any interest in me putting a demo of the software up that people can poke at? I'd have to fake some of the temperature data I guess since I don't want a propane burner hooked up to the internet. :)

The filter is 3/4 Female, the bushing is 3/4M x 1/2F. One of the camlocks is 1/2M the other 1/2F and I just use a nipple, but that's just because I had a female one, they make males too. No, my filter has a thing on the top(bottom in the picture) you turn from "Filter" to "Off" to "Bypass"...

That's what I did. The filter has a male on one side and female on the other. Doesn't leak, and you can take it off empty it and put it away.

The keg doesn't HAVE to be cold, but the amount of CO2 that can be dissolved in a liquid is in part determined by the temperature of the liquid, so it has to be cooled in the tube if not before. If you're cooling it in the tube it also means you'll need metal tubes, since plastic does such a...

That's not true, they can be stopped at any point by cutting power. They're not spring loaded or anything.

This is both because of the tube length and the fact that it's at room temperature. My guess is you'll need at least 15-20 feet of 3/16 tubing to bring the pressure down, your 35 foot number might be closer. And the water will need to be cold, really cold. In regular installations they run the...

So maybe I'm not following correctly, but if you're looking for variable flow, you can open the motorized ball valves part of the way.

I recently got a mig welder too. This was my second or third project. Came out OK, but a lot of grinding was required to clean up my mistakes. I will say any polishing of the frame I did was a complete waste of time. It gets scratched up pretty quick. Are you going to use a wifi shield for...

I'm using a perl backend to provide a restful API to the front end which is all javascript. I'm using Sencha Touch as the UI. All the services that interact with the arduino and other devices are written in perl too. I was going to try to learn a new language, but perl was too easy.

I started off using an arduino uno to control external valves, pumps and burners via relays, and read the temperature probes using the Dallas one wire library. I also used a raspberry pi to drive the process and UI, but it just can't run a browser at an acceptable speed. I ended up moving to an...