[ecoxantia]

I'm very interested in building one of these.

My car has a Peugeot/Citroen HDi engine. The injectors open at 70V, way above a conventional petrol injector. What additional circuit could I add to a) not interfere with the car and b) not fry the MPGuino's microprocessor!

Would a simple "potential divider" do the trick with suitable resistor values?

What voltage does the MPGuino want to see on the injector connection?

70V---
I
R
I
-----------MPGuino
I
R
I
----------GND

There is some introductory info on the engine at
autospeed.com/cms/A_109357/article.html
for those interested.

Thanks in advance,
Simon

PS Just realised that as my injection pressure can vary from 200 to 1350 bar (that's 1350bar) then I need to add this into the equation. I have a fuel pressure sensor. How hard would it be to add in another variable?