I normally regulate 24vdc down to 5 for projects involving a microcontroller. Now i have one where i have a need for 12vdc also. is there any advantage (heat, effeciency, etc.) to regulating the 12vdc down to 5 instead of going straight from 24 to 5. I use the d2pak type regulators (7805, 7812). Are there any disadvantages (noise, tolerance)? Thanks