Read through the forums a little, One keg board and an arduino uno can do 2 taps max, each keg board can take 2 coasters max, and each coaster can run 2 taps, but apparently the coasters were only for convinience of wiring. It comes down to the number of interupts avaliable on the arduino. Now you can hook up as many arduino's with kegboards up to the same system as you like (just rename server side). The Arduino Mega (and they reccomend the AT128) can handle upto 6 taps but as stated previously you would have to have the board made up yourself. Note the server for keg bot does not run on the arduino it requires a seperate linux system, and if you want the interface obviously a cheap Andriod tab. Still got a bit more reading to do, I have nowhere near the arduino experience you do, you might be able to get your head around it a little better. If I were to do something like this it would be a few years down the track, so hopefully one of you guys get one up and running and I can pick your brains. Over all it seems well documented and the forums provide a little more indepth info.
Ummm .... pics or it didnt happen, nah bugger that, anyone does this and they should do a tutorial very cool bit of kit
Yeah, it appears you are right. The website is misleading but the forums describe it perfectly. For four taps you have to either:
1. buy two arduinos, two keg boards and two coasters
2. buy arduino mega, design own keg board and two coasters
3. re-design the wheel
Personally that sounds like too much hardware.
If you're after accurate volume measurements, i think Zizzle's method of weighing the keg would be more accurate than flow measurement.
When you try and totalise a flow, if there are any inaccuracies in the flow measurement these are 'amplified' by the totalising. The error then becomes quite noticeable.
Zizzles method is great but it requires a LOT of work:
* Build custom floor for the fridge to which you can bolt the measuing apparatus
* Build the measuring plates
* Ensure that your floor and plates aren't going to get destroyed by condensation/liquid damage
* Calibrate each measuring plate
* Build the amplification circuit
* Ensure shielding is strong
* Much more wiring
I am thinking that I will use a purpose-built data logger which can handle everything and has a webserver in-built. I already have a suitable solution with multiple high-speed counters and inputs for up to 5 load cells, but I still like a proper, customised solution.