[EMAIL PROTECTED]> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <[EMAIL PROTECTED]>; from eresrch@ eskimo.com on Wed, Jun 18, 2003 at 07:41:53PM -0700 X-key-url: http://web.jfet.org/pgp.asc X-url: http://web.jfet.org X-keyserver: cryptonomicon.mit.edu X-key-fingerprint: B1CD 1262 0B82 47B1 BB4E 15D3 920D 1BEF 3D38 5585 X-rand-ascii: },4qces{=`!eLcR""2TW:L*D/J#>#M.p^98iLx`Ep{x)EC8E"yZ#{+3[26.\O=Cz X-NSA: Ft. Meade NSA Croatian pentagon FSF RUBY RIDGE X-brought-to-you-by: a conglomerate of harmful Dandie Dinmonts
Mike Rosing <[EMAIL PROTECTED]> wrote: > Automotive environments are known to be harsh, so electronics is protected > to some extent. The assumption is that spark plug voltages can get into > sensors, so most data lines are protected as are the sensor lines. If you > try to fry things with double the voltage of a standard spark plug it may > not work, if you use 10 times that it will, but the ESD protection will > obviously be blown too. That begins to look suspicious (but I doubt > anyone could _prove_ you fried it on purpose). In automotive power systems, the bigger concern is load dump. When there's a step change in alternator load from high to low, the commutating inductances resulting from the field windings of the alternator can't react quickly enough, and you tend to get big spikes on the power lines. Perhaps this could be used to advantage---if you want to convince someone that your electronics blew up on their own, blow up the rectifier at the output of your alternator, too. -- Riad Wahby [EMAIL PROTECTED] MIT VI-2 M.Eng
