[Diy_efi] coil (-) tach signal conditioning

[Dennis Noordsij]

> I'm using the serial bootloader from Microchip's Appnotes, and developed a
> KDE program to upload/download from the PIC's Flash, in case you're
> interested.

Yup, have been using that bootloader also. I found a linux commandline app for 
it some time ago, which only needed a small change in serial port handling, 
and otherwise worked fine (the java version was a pain). 

Haven't touched it in a while though and toyed with the idea of a KDE app for 
it, but if you have one already that'd be great! :-)


> Thanks.... I already fried a PIC, so I guess that between this circuit and
> the PIC, I'll place a 4n26 for added safety when I playing with it.

Hmm that sucks. Have a look at the Megasquirt notes about the optocoupler 
ground still causing processer resets if not completely isolated. Otherwise 
it's a good idea!


> > If you do try it, please do let me know how it turns out! I only intend
> > to use it with electronic ignitions, not points.
>
> Me too. Development is being done with an electronic ignition, but it would
> be nice to support points too.

Please let me know what circuit works for you, I'd like to go out and try but 
it's -10C here and I don't have a heated garage so bugger it :-)

Do you have a URL for the KDE app?

Cheers!
Dennis