Greetings all, I am a first time poster looking for help on a project I am working on. I am building a slot car track and I am nearing the end, but I have one last item I would like to rig up. I am supplying power to the track with an adjustable power supply. I am operating the track at about 10VDC for the kids, 18VDC when the grown ups are playing and up to 24VDC after the grown ups have had a couple of pops. I always have the power supply set to the maximum 10Amps. What I want to do is supply power to my Infra-red timing system without having to plug in an extra adapter. I have an adapter rigged up right now that has an output of 12VDC with a max current of 300mA. Is there any way of tying into my variable power supply and keeping it at a constant 12VDC, regardles of what I have the input voltage set at on the track. I have tried to dig up info on voltage regulators but am not sure if this is what I am looking for or if this can be done at all. Looking forward to any input , Kevin. (a cabinetmaker with a solder gun in his hand )