Well its a simple alarm circuit, once the car is started or anything in the car activated other then door locks opening and closing it is ASSUMED that the lock has been disabled. So i would think that im pretty safe as far as a clean signa l screwing up the function of the system. Unless it will damage the chip or reg ulator?? u think?? As far as the 7805 for some reason i cant get over the idea of currrent. If any ones going to reply to this to the group i think i would suggest changing the SU BJECT line...Tell me if this is correct...It doesnt matter how much current your batter or what not can supply...it matters how much you are drawing out of it ( ?) MikE >On Thu, 4 Nov 1999 11:03:25 -0800 (PST) Tobin Fricke wrote: >> >> >>On Thu, 4 Nov 1999, Mike M wrote: >> >>> i need to connect a pic to my car, using the 12v car battery...umm i >>> assume i can't just wire up the car battery to like a 7805 to control >>> the voltage..or maybe im wrong...Suggestions? >> >>You might want to check out the various "low-dropout" voltage regulators >>available, depending on how much power your application will draw. The >>linear regulators (such as the 7805) are dissipative, so they can waste a >>lot of power. Using a 7805 to power a 5v application will waste more >>energy than it will put to use: (5 volts)(i) output power, (12 volts - 5 >>volts)(i) watts dissipated as heat. >> >>Tobin >> >>To unsubscribe, send email to majordomo@seattlerobotics.org >>In the message body, put unsubscribe srs >>For more information, www.seattlerobotics.org/contact.html >> > Send someone a cool Dynamitemail flashcard greeting!! And get rewarded. GO AHEAD! http://cards.dynamitemail.com/index.php3?rid=fc-41