Path: utzoo!telecom-request Date: 8 Jun 91 03:12:49 GMT From: Dave Levenson Newsgroups: comp.dcom.telecom Subject: Re: Cellular Modems Message-ID: Organization: Westmark, Inc., Warren, NJ, USA Sender: Telecom@eecs.nwu.edu Approved: Telecom@eecs.nwu.edu X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@eecs.nwu.edu X-Telecom-Digest: Volume 11, Issue 435, Message 4 of 11 Lines: 28 In article , dplatt@ntg.com (Dave Platt) writes: [ regarding the use of lap-top computers and cellular phones from an automobile 12-volt electrical system] > If you want to run a laptop, cellular, etc. from an auto's electrical > system, you'll probably have to buy an external high-amperage 12-volt- > to-5-volt stepdown regulator (probably a switcher, with extensive > surge protection and some big filter capacitors)... Perhaps I'm confused, but I thought that most cellular phones are designed specifically for operation from an automobile electrical system! Mine certainly is! On the subject of operating computers in cars, you might want to check out TrippLite and others who make inverters. These devices take 12-volt DC and deliver 120 volts AC. They are used on boats and in motor homes to operate small household appliances. Some inverter power supplies are clean enough to operate computers. Dave Levenson Internet: dave@westmark.com Westmark, Inc. UUCP: {uunet | rutgers | att}!westmark!dave Warren, NJ, USA AT&T Mail: !westmark!dave Voice: 908 647 0900 Fax: 908 647 6857