DIYEFI.org Forum

Well, opto is expensive, big in size (at least the ones I saw) and there aren't many multi-channel ICs out there. There is a 6 channel RF isolator, though, that could be interesting. It was in the dirst drafts of the puma design and got removed. How about 4N35 series optocouplers? They seem to be g...

EDIT: This thread is for comments on the SM Re-Development in GCC + Customisations/fixes thread.

FYI, I'm very happy about this :-)

How many people here have a programmer to make it happen?

If you're done with smps and pwm/p&h testing, you could always do some ign driver experimentation or opto isolation experimentation or something :-) awww :P Well, opto is expensive, big in size (at least the ones I saw) and there aren't many multi-channel ICs out there. There is a 6 channel RF ...

Absolutely not acceptable on a device with a "FreeEMS Compliant" stamp. You're free to do as you please though. CPU ground must stay at or very close to zero potential. It can not do that (no matter how much copper you throw at the problem) unless the drivers are separated from the analog...

LOL, you're hot! (52.746 degrees in my experience) :-p ha! I'd say its around 50°C, but i have no clue really. I reacall your TA board was at that temperature. so vibration could be an issue, depending on ratio of heatsink to mount points and geometry. Yup, thats my big concern, but I saw one that ...

Well, there is a chance that the resetting was happening because of a cable that got open by the engine vibrations. What I did: *see the resets *twist and cut the mbed supply cables *after plugging it to the car, noticed that 12v is shorted to the ground plane in the board. Yes, it has solder mask, ...

Jared, the injector has a datasheet that says around 12v for the supply. I'd say that with 80v it reaches the 4A :) I got it, LF = not good. I ran a test on the car, and with the original freq, ~50khz, the disturbance seen was mostly generated by the peak of current consumption, rather than the PWM....

first things first: thanks Jim :-) Ok, this is the topology of my SMPS: https://lh3.googleusercontent.com/-k73sfh-VqnU/TgCv3qmMDcI/AAAAAAAAAu8/h0WtIZSifc4/s640/DSCF0294.JPG At the left you can see the inductor, the controller, diode and capacitor. After the smps LC, I added an RC (0.1ohm+4.7uF ceram...

Hi, and yes, this post has been bugging me for a while. Its partially written in a text file in my box, but I hate to post things without enough work as a background. I want to solve the last issue I'm having. ripple is ok, temperature is fine too. But, in this older car (I blew the Palio's head gas...

On second thought, 10khz could be too low. My only input is a very slow, very large injector, but if it would be a fast one, the current ripple could be too large.