On 6/26/08, Dario Greggio wrote: > The remote devices are PIC16F628 or 18F1320 based... @5V. A linear > regulator with a small dissipator is ok (tested for years @24V). > I just believe that I may never need 24V - it would be most needed in > industrial field, not at home... You can use the industrial things at home. ;-) So 24V is a good choice. Say you want to have some sensors at home which is quite possible (say infrared opto sensor) , most of them will work at 24V (20V-30V or 10-30V typically). And it already works at your home. Xiaofan -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist