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Hi,
I'm working on building a controller with independent pwm channels / distribted controller and as Bob mentioned, the picaxe's should be very cost effective even if individual mcu's are used.
I've used 4 picaxe's on the same I2C bus and they're easy to implement.
I'll carry out some tests and draw up a pcb schematic once I have the prototype working.
I'll try and make it modular so you can add on or remove channels as needed. only bit that will change is the code for the master mcu.
in terms of temp regulation, Bob what would the target temp range need to be at? 3 to 5 deg above dew point till 10 deg above dewpoint or a wider range?
the pwm freq can be linked to the sensor temp so they're not unnecessarily heated but still stay above dew point.
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