Hi everyone, I thought I'd post here to ask for a bit of help/guidance on our proposed senior electronics design project. We're calling our project the Power saving outlet. The idea is to cut ALL power to a device when you switch it off. Many devices I've noticed (TV, radio, guitar effects pedals) are all drawing current even when switched off. I've come up with a very basic idea on how I think it should work, and am in need of someone to tell me if I'm on the right track. The outlet will consist of some kind of a current measuring device, in line with the 120V mains supply. I was thinking of maybe using a standard Ammeter, and then pulling the value from it. Not quite sure how that would be done. Anyway you plug your device into this outlet, and turn your device off. Then there will be a "SET" button on the outlet. You press this button and it records the value of current in the wires. This Iset is the current the device draws when it is turned off. Now a microcontroller on board will look for conditions in which Iwires = Iset, and activate a relay (maybe) and cut all power to the device. Does that sound plausible? If this works, I'm a little unsure of the next step, which is how to actually give power to the device when you want to turn it on. Somehow pressing the power button on the device will have to deactivate the relay? Anyway I would very much appreciate anyone who has any kind of input at all. We have already proposed this idea to our professor, but he wants us to elaborate on it. I told him everything I've written above, but at this point I haven't done much research related to a much more low-level functioning of this design. A big thanks to anyone who can point me in the right direction.