I have a hifi amplifier which can only be turned on or off by a power button located on the unit. I would like to be able to turn the device on or off using a remote control. Would it be possible to build a small infra-red switch which could do the job? I imagine the device would comprise: - an infra-red receiver; - a small mechanical spring-loaded arm, which would push in and out, in order to turn the amp power switch on or off; and - Some form of small power supply in order to power the small spring-loaded arm? Can anyone please advise - is this likely to be something which I could realistically build? Thanks.