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Hi IRstuff, thanks for your comment. I have looked into those, and it seems that they use the current to keep the dore closed. As soon as the power is off the spring opens the door. The problem is that this system is using power continuously and I want to make an energy efficient system. So I...

Thanks for your reply! So it is clear that a dumb question is always more difficult to reply than a question from an expert, huh! To put this into a more graphic terrain, just imagine a drawer into a cabinet that needs to be hold in the closed position with a pushing spring that would try to...

Hello all, I am new to the forum and I regret to tell that, although I am an engineering enthusiast and do play around with concepts for my engineering team to understand my needs from the market, actually I am a Marketing Director. I hope this is not a reason to reject my participation here. I...