8-16v is just the start if its in a vehicle. Don't forget to filter for... +28v (some incompetent trying to start it with a truck battery) -28v (someone really incompetent trying to start it with a truck battery) Nasty transients upto ? +-80v etc Stuart ----- Original Message ----- From: "B|hler, Martin" To: Sent: 05 January 2004 10:38 Subject: [EE]: stable 12v supply from 8..16v source i need to get a stable 12v supply (at least 1amp, peaks might be higher) from a 8..16v source (car battery) to run a harddisk. what's the best / easiest way to do this? anyone done such a design? thanx! tino -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body