The inductive pick up schematic is here: www.patentranch.com/tempfiles/inductive_schematic.pdf
If you want me to send you one I can, note that the LM1815 has a maximum voltage of 12V, thus it should be powered from a regulator. For those of you wondering it was designed to be an interface board for the small engine monitor I made, which incidentally I will be releasing as open source as soon as I get my website redesigned. Also the OBDII device will be open source as well. Overall as mentioned before it is far easier to get the correct parts than to hack something together. Trampas -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Trampas Sent: Friday, November 10, 2006 4:57 PM To: 'Mercedes Discussion List' Subject: Re: [MBZ] Project to tickle your brains with.. I have a small circuit board that will convert a crank sensor (inductive pickup) to a TTL signal. I also have a device that has an LCD for displaying the data. The problem with the crank sensor is that as I recall it only triggers once per revolution, I am not sure what the tachometer is looking for but I can find out as I have a 300SD. By the way here are some of the products I have built, www.sterntech.com Trampas -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of R A Bennell Sent: Friday, November 10, 2006 3:47 PM To: Mercedes Discussion List Subject: Re: [MBZ] Project to tickle your brains with.. Yes, I saw the post yesterday with the link to Roger Brown's site. I knew about him from my travels on the net relating to old Toyota 4X4s. The idea of using a crank sensor appeals. I just wondered what else I needed. Randy -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Rich Thomas Sent: Friday, November 10, 2006 11:37 AM To: Mercedes Discussion List Subject: Re: [MBZ] Project to tickle your brains with.. You could do an LED and a light sensor with a white mark on the crank, of course that would be affected by whatever goop gets splashed up there, but something to wipe it off as it goes around... --R R A Bennell wrote: > What triggers the crank sensor on most new cars? Is there a magnet inbedded in the crank dampener/balancer/pulley > (whatever you wish to call it)? > IE - If I were to try this route to put a tach in my 76 300D, I assume I would have to attach something to the > balancer to trigger the sensor as there would not be anything from the factory. > > Randy > > -----Original Message----- > > Given the relatively ready supply of junkyard parts, I can't see any > reason not to just use them, it's nearly trivial. (As I believe the > front crank sensor is already there, at least on a lot of cars. Goes > to the diagnostic socket.) Even if you have to install a factory > sensor, it has to be easier than flanging up something yourself. > And running it all over, and designing circuitry. > > -- Jim > > _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
