This is the only other ignition in the world that is specifically
designed for a two rotor.

It is lower cost by about $150 compared to two Mallorys

Probably $900 lower cost than the M&W.

I could also include two LM1815 circuits that would condition the
pulses out of the stock crank angle sensors for a few dollars more.

If any one wants to build one I can do a circuit board for them.
-------------------------------------------------------------------------------------------

 If any body has a 2nd RX7 ignition system the waste spark coil will
work with this CD system. You will need two for a 2 rotor.

This will save you a lot of money. You can buy them cheap on ebay I
am sure.

I found the old LM1815 are no longer available in dips so they must
be surface mounted. Not that hard for this part. It can easily be
done with a small tip on a soldering iron.

---------------------------------------------------- Ops I found some
LM1815 dips on ebay at a great price. Just over a buck apiece.

Steve, get some of these and send some to me. About ten would be
about right.

Here is the schematic with the LM1815 on board. These are wonderful
chips for taking in CAS signals an outputting a simple pulse.
Megasquirt uses them as well. Why they are not making the dip
versions anymore is a mystery to me. Dips are much easier to
experiment with.

Here is the schematic with the LM1815's.

---------------------------------------------------------------------------------------

 The other relatively expensive part is the 1 mf high voltage
capacitor that stores the charge. It is 760 volts. I could not find
one with less voltage.

Here it is one Digi Key for $2.83 cents each.

Still working on the transformer.


Paul Lamar


I would be keen  for a couple of boards, If you are not making a few
complete units. I already have the coils lying around somewhere.

Richie Barrow

I am not ready to do the PC boards quite yet. Steve Carlisle will
take it over when I get a bit further along.

I usually order 3 PC boards at a time  as they are cheaper that way.

Paul Lamar



Paul,

If someone is making boards count me in for a couple.

I have the daughter card and have experimented with the CAS in a drill press
and the board cleans up the pulse.

Joe Berki




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