DIYEFI.org Forum

My Chinese version Citroen ZX, 8 valve 1.6 L gasoline


Under my engine hood


VR sensor


Fly wheel


MAP


16 Ohm low impedance injector


TPS


IAT


Stock ECU, Bosch MP 5.2


Main controller, only 8 bit


back


Lowside switch chip


It's usage


Ignition transistor


Ignition output layout


The attachments is the external schema of my stock ECU, my objective is to tailor FreeEMS to compatible with the stock socket. There's a high resolution version uploaded on sendspace.
http://www.sendspace.com/file/6icv99

My tailoring work on puma board was allmost completed but not yet doing the layout. I don't know how to use github to fork the main trunk, anyone can provide a tutorial? or I'll upload my whole working directory on sendspace latter on

Cool! :-)

Nice one!

Very Cool.

Welcome on board HotCat.

16 Ohms sounds like high impedance to me?

BenFenner wrote:16 Ohms sounds like high impedance to me?

Typo from 1.6? Otherwise, yes, you're right. Good spotting.

Fred.

Fred wrote:

BenFenner wrote:16 Ohms sounds like high impedance to me?

Typo from 1.6? Otherwise, yes, you're right. Good spotting.

Fred.

Yeah, It's my mistake. High impedance means I don't need chip 1949 and darlington NPN to drive my injector. I've tested my injector, the saturation current is only 1A. All I need is a MOSEFT which can interface to I/O pin directly

HotCat, be careful, most normal MOSFET can't be reliably driven with the tiny current the cpu can provide. For ordinary ones, you need a driver chip. Look for logic level FETs such as the VNP10N07 or similar. Don't use PIP3104, they're junk, I found out the hard way...