NA MX5 OEM PCM Hardware design benchmark
 

Just for a reference I want to go over the OEM PCM printed circuit board and sketch out the circuit schematics.

So many of us are tinkering with a replacement for this device. I thought it would be good to review what circuits Denso used, and maybe stimulate a little electronics discussion to compare with the Megasquirt circuits etc...

There might be some design gems in the Denso box worth transferring over.

EG:
http://www.tincannetwork.com/files/CMPSchem_01.png

There seems to be abit of electronics / megasquirt projects on this forum, thought it might be usefull to put all this info in one place where everyone can find it.

Few questions:

Has someone done this before? I obviously don't want to waste time if this has already been done and clearly documented somewhere else.

Any suggestions on where to keep it?

I would really like to put it somewhere with some change management or a database backend etc... so if updates are made they can be documented, or even a "checked" mark if someone wants to independently verify the circuit.

Anyone keen to help or have some sketches they worked on already? It's a big job that could be very easily split up and worked on independently to get it finished faster.

the NB crank and cam input has already been back traced and posted here. otherwise the Megasquirt inputs both VR and Hall works great.

http://img37.picoodle.com/img/img37/...2m_a6b73d2.gif