[Diy_efi] Info on how to make crank position sensor circuit?

[David Gravereaux]

bcroe at juno.com wrote:

>Just how much more accuracy than individual flywheel teeth 
>is really useful?  Bruce Roe

Whether I infer in hardware (integration in the loop filter of the PLL),
or infer by time in between teeth, it's the same result (hopefully).  As I
have no idea how to do a DPPL, I'll start with a 4046 and a timer used a
programmable counter and see where it gets me.  A quarter of a degree
resolution seems like a good starting point.

If I can get it to pass the strobe test with a gear on a drill jacking the
rpm all around, i'll be pleased.  From the archives, someone advised a
DPPL to be more adjustable with regards to noise rejection because all the
math is right in front of you...  Trouble is...  my dppl.c is blank.
Anyone have some C source for a DPPL?
--
David Gravereaux <davygrvy at pobox.com>
[species: human; planet: earth,milkyway,alpha sector]
Please be aware of the 7.5 year ping times when placing a call from alpha centari

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