DIYEFI.org Forum

Why not to just use a built-in ignition switch controlled LDO such as LM9070 to wake up MCU first?
http://www.ti.com/lit/ds/symlink/lm9070.pdf
Then the MCU starts to control of the other actuator power.

Although I could not fully read and understand the fights under this post, I am really confused about the claim of the advantages over innovate. As I know and in our practive the analog output from LM-2, LC-1, or ALM could be created by PWM output with OP AMP or DAC. That means the output is created...

Thanks for your help.
Exactly, I had sort our my short problem: Stepper motor driver IC Power jumper wire broken and touch the VCC.
I will follow your direction.
The reason why I am interested in discussing here is that "you guys are here".

Thanks again.

My MS-II Mircrocontroller (marked MC9S12C64CFAE) is very very hot and have burning smell when power is turned on.
Can I just buy a same Chip, replace,and then use the downloader to install the firmware?
or there is any specific tool I need for repairing?

Thanks for your help in advance.

Need to discuss one point about Battery Voltage Sensing. In the above photo, the Battery Vol Sensing circuit is attached on the input of U5, but at this point the voltage had been regulated by before circuit, right? May the Battery Voltage not be correctly reflected? Would the injector and ignition ...

Find out the real root of my fault.
The connection is exactly right.
The reason of MS-II frozen is that :
I set up. 1 squirt per cycle, 1 cylinder, and then chose Missing Tooth Trigger.
The equation on the MS-II code will have problem in calculation.

Hi, Really really appreciate you hard work and sharing. I am new in this forum, but have follow the above instruction to modify my V3 board. What I discover is that if I attached the Battery Voltage sensing on pin1 of U5, the MS2 could be always frozen. But If I attached it to the V12 directly, ever...