Bench racing ecms Even if ya hate 101 please read

[Shannen Durphey]

Bruce Plecan wrote:
> 
> I just put the hammer, and nails away from nailing the ecms down.
> Actually coffee cup hooks, and rubberbands.  Got a 1'x2' sheet of
> particle board, 1/2" thick, and the ecms tied to that via the rubberbands.
> So some barrier strips and we get to fire up the
> soldering iron (well actually crimper).
> 
> Here is what I have, and what I think I need, any thoughts comments
> appreciated.
> <snip>
> A 50% dwell frequency generator for VSS,  hopefully this will work,
>     and not have to bother with Buffer/amp, or DRAC..

GM speed signal generator outputs 7VAC @ 60hz for 60mph.


> A rpm signal generator, but have to work out an interface to module
>      is a transformer necessary?.  Ya think just a 1.2v DC pulse would
>     fire the module?.  Use a monstable 555 for the 1.2v, and then
>     an adjustable astable for rpm?.

Same speed signal generator, when connected to pickup coil
terms on module fires it quite well.  Module sends reference
pulse to ecm.

<more snip>
Shannen