This is about an arduino mega based PCB, which can switch up to 40 mains (110V or 230V) devices, and has various input sensors.
It is originally intended to be a variable load (Electronic Load Controller ELC or Induction generator controller IGC) for hydro power systems, with additional features like water valve control (main input valve MIV), and monitoring/protection/automatic shutdown features.
However it can be used in any application where it is necessary to switch many and/or high-power devices.
Examples: electric heating systems, light systems for home, stage, theater, 3-phase appliances, home automation.
Possible types of switching: - 24 channels with zero-crossing switching, up to 4kw each - 3 channels with phase-angle dimming, up to 3kw each - 8 channels with SSRS, up to 10 kw each - 5 channels with mechanical relays.
32 Inputs: mains voltages, mains frequency, current, temperature, a few galvanically isolated inputs.
Additionally, the board has an LCD display 320x240pix, a 4x4 keypad, SD card, ethernet, GSM
I have produced a small batch of 10 PCBs in through hole method, and have soldered them all by hand.
Now I am thinking of getting a small run produced at itead in SMD technology. Obviously, the price will depend a lot on the number of boards.
So I would be interested to get some feedback if a board of this type would be of interest to a broader community.
A preliminary guesstimate of the price would be 150-200 USD/EUR for the PCB, excluding the power switching elements (triacs and SSRs). It makes sense to mount the triacs and ssrs separately, because - they need heat sinks - to keep some distance to the PCB to avoid EMI interference - they are the single most expensive components, so it makes sense to buy only the ones you need.
The software would be open-source, so anybody can modify it to their needs.
More information: www.hydroelectronics.net
Any feedback is welcome! Thomas