Today I modified my sisters TV so that she could plug her video games into the TV without needing to keep putting in new batteries.
It consists of a cheap power supply from Radio Shack, and a size M coaxial panel mount connecter, on the Tv side. On the game side there is a cord that is the same length as the RCA connecter cable. On the Tv end of the cable is a size M connecter that goes into the connecter on the Tv. The other end of the cable goes into the game, near where the RCA cable goes into the game.
One of my future projects will have to be modifing it so that it will turn off when the tv is off. I think this will be an easy thing to do, there is an LED that is on only when the tv is on. I have a solid state relay that uses 1.2 volts for the control voltage, which happens to be in the range of voltages for LEDs.
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