pH/PPM Meter - Original board

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pH/PPM Meter - Original board

Images of homebrew ppm/ph meter with serial and usb for loggin and setup. More details of the project itself can be found here. (clicky!)
Display board from an old video editing console. The two 6 place displays were from hours, mins, seconds, frames display. This was chopped off with hacky saw and modified to be used as the display for meter.