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.
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   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.

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   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

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