Hello all. I am an aerospace engineering student working on building a hydraulic Stewart platform for motion simulation. Unfortunately for me and the rest of the team no one knows much about electronics and embedded systems yet. We have 6 analogue servo amplifiers that control the opening of hydraulic valves. the servo amplifiers' input command is +/- 0 to12vDC. Problem we have is that we don't have hardware to interface the servo amps to control software. We are trying to keep cost down so i figured the cheapest option will be to make one. i have had a look around on the net and i've seen some arduino dac projects there but it seems they dont have one to output 6 channels. Can someone please point me in the right direction, i dont know much about the subject but willing to learn.