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Message: <blockquote data-quote="ttocs" data-source="post: 1042759" data-attributes="member: 11896">ok well the dimming when it turns off will not be a problem.  All you need to do is add a capacitor to the circuit and it will hold a small charge after power is cut.  That charge will be burned off slowly by the leds as they dim while the voltage drops to 0 the way you want.  The number of lights you are running will determin the size cap needed to give them the time to dim that you want.   Now to slowly light up I am waiting for a reply but it should be as simple as adding a resistor to the cap so that it limits the current fed to the cap while it slowly charges.  We/you might need to play with the cap/resistor values to get the effect you want but we are talking about $5-10 in parts really.  If you figure out how many leds it will power once I am out of the hospital and dig out my old tech-school tool box and componant kit to do some testing to see which values you would need to use to get the effect you want.</blockquote>