I've posted this elsewhere, but thought the MD community would appreciate it / could use some of the ideas.
First up, a big thanks to Swede for the PWM info & the idea to switch the control ground rather than the positive. I can now control each outlet via PID control, PWM (it allows me to vary each outlet's output from 5-95%) or 100%.
I wired in a contactor for the EPO and modified a server power supply for the 12vdc feed (used for PWM module, 100% & radiator fan).
Bought the cabinet of evilbay (it came out of the old mitsubishi plant in Adelaide & had the din rails, some circuit breakers, switches & wiring in place), the contractor, PWM modules, 20 & 32A outlets and 3 way switches were also sourced off evilbay. The PID's, SSR's and heatsinks are from Auber Instruments. The terminal blocks were from the local electrical wholesaler
Really happy with how it turned out. I'll be using this to control my herms too - but thats another project
OK, now the warning, electricity can be dangerous. Don't stuff with it if you don't know what you are doing!
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