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Flood_of_SYNs · 07-06-2009, 04:39 AM

You need the Zener diodes in place to drain off extra voltage to the ground line.

As I understand it the Zener acts like an overflow valve, turning those high volt injector pulses into low voltage pulses that the ATMEGA chip can safely handle.

Either [No10: "Injector"] or [No20: "Injector"] is what you want to tap into.

Ideally you want to use the car ground and not the ground on the ATMEGA board.

Here is a simple page I made, mainly as a reference for myself but I was hoping it would help others.

How to build an MPGuino - EcoModder

I created the image on that page because all the other ones I found where kinda confusing.

07-06-2009, 04:39 AM	#2 (permalink)
Flood_of_SYNs EcoModding Lurker Join Date: May 2009 Location: Northeast Indiana, USA Posts: 5 Dora - '98 Ford Explorer XL Thanks: 0 Thanked 0 Times in 0 Posts	You need the Zener diodes in place to drain off extra voltage to the ground line. As I understand it the Zener acts like an overflow valve, turning those high volt injector pulses into low voltage pulses that the ATMEGA chip can safely handle. Either [No10: "Injector"] or [No20: "Injector"] is what you want to tap into. Ideally you want to use the car ground and not the ground on the ATMEGA board. Here is a simple page I made, mainly as a reference for myself but I was hoping it would help others. How to build an MPGuino - EcoModder I created the image on that page because all the other ones I found where kinda confusing.