Funny you should mention that. I just finished a welding course, taken for the sole purpose of doing 2 things on my kitcar -- building my self-designed kick-all-butt rear suspension, and building a new fuel tank (aluminium) which will have dual in-tank pumps to power the 500+ hp w/o the annoying noise of external fuel pumps. Don't think I will try, but according to the instructor, you can weld tanks which have already had fuel in them, by filling them with water. Cheers, -Neil. -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Brendan Moran Sent: Tuesday, June 25, 2002 12:46 PM To: PICLIST@MITVMA.MIT.EDU Subject: Re: [EE]: Fuel tank sensor / real world solutions Here's the next extra credit: do it without cutting open the fuel tank, since welding fuel tanks back together (especially if they're aluminum) isn't exactly the focus of most electronics hobbyists. (; --Brendan ----- Original Message ----- From: "Pic Dude" To: Sent: Tuesday, June 25, 2002 10:32 AM Subject: Re: [EE]: Fuel tank sensor / real world solutions > Get some pressure sensors at various points along the > bottom of the tank and a multi-axis accelerometer. Run > those into a PIC where you can actively calculate the > motion of the fuel at any point in time and reproduce > its behaviour, and hence derive it's volume. > > Thinking outside the box, about what's happening inside > the box. :-) > > Extra credit if you do it with a 16F84 and no math chip. > > Cheers, > -Neil. -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu