signal from coil and back emf......

[Simon Quested]

Hi Matt

> You'll definitely need a clamping diode between a home-built driver
> and any inductive load to suppress kick-back.  For an injector or even
> an ignition coil, I'd recommend a 1N5408 silicon rectifier diode.

I'm using a 1N5404....

>  You should try to get
> the diode as close as you can to the injector to keep the current
> snap during discharge from causing any false triggering in your
> circuit.

I didn't know that ! but as it turns out the diode is across the 
wires that go to the injector 
 
Thanks for the help

Simon
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  Simon Quested (E-mail questeds at lincoln.ac.nz)
  Computer Technician, Silicon Graphics & Windows NT Support
  Centre for Computing and Biometrics
  LINCOLN UNIVERSITY OF NEW ZEALAND
  Phone (64)(03) 3252811 Ext. 8087
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http://www.lincoln.ac.nz/ccb/techs/simon/default.htm
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I drive way too fast to worry about cholesterol
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