Hello all, i am glad so many people are intrested. I have spent a bit of time on this, so i am glad others can get somting out of it.
Abit more details. The computer itself has a lcd pannel on the front to show water temp, hood temp, PH and C02. It will also show the time and what the kh has been set at. the controller also has a menu in the lcd to force the lights, heater, fans and c02 valve on or off. It will be able to controll 5 sets of lights, two heaters, hood cooling fans and a c02 valve.
app is used to set everything up (time when lights go on and off, temps and c02 level) as i am thinking that is easyer then using some litttle carppy menu system, which i hate
The ph proble can just be any ph probe with a BNC connector, which most are. The temp probles, however you will need to make your self (or i can do it for you) as they a digial sensors (DS18B20).
Just a word of warning, this is a farly complex project with a fare amount of soldering. If you are not very good at it, you may have some issues. Also, there is 240\110 volt wiring. The controller haas its own power supply, so it will not matter if your power supply is 240 or 110. You will need to get your own transformer. I will supply some plans and instructions when i have finnished my finel product.
What would you pay for such a thing? $1000, $700, $500?? (Remember that the controller in my first post is worth $700, without temp probles).
At the moment i have spent about $180 on mine, but may be able to get cheaper parts in your area.
Anyways, i will try to get some pics tonight to show you what it looks like.