rusefi.com

This would not be a simple circuit. 50% duty cycle means it's not just a low pass filter. I played around some with QUCS looking at adding a diode and cap to function as freq to voltage converter. So far no easy solution. I might have something that produces .9V to 1.1V, but that range is blah, and...

Someone at TI let it slip on the TI Wiki Hercules page.

Scroll to the bottom and look under "L".

Last I heard, 433MHz is not allocated for unlicensed use in Regions 2 or 3- colored blue and violet in the image below. However in Region 1- Europe, Africa, parts of the middle east and northern Asia- i.e. Russia and such, it's okay; colored amber in the same image. http://upload.wikimedia.org/wikip...

Yeah, it's liquid... Radio Shack brand catalog 64-021A from what I can tell. Don't think it's available any more though.
But even the pasty stuff would work as long as you have enough to smear around a bit.

... not that I'd recommend swim suit wrestling in it....

1K pull-up is kind of strong; maybe 4.7-10K is more apropos. You need a fast transition from high to low and 1K will adversely affect the slew rate, if the chip is even really able to reliably overcome that at all.

Well, this was a little unexpected turn, no? I mean "unexpected" as in it seems a little early to have your things co-opted out to some other project. Andrey, I hope you receive product, without charge, so you can validate your code works against these boards, otherwise someone else owns it.

Any progress with the TMS570? Ive fallen in love with it so I've got a launchpad2 to have a play with. It seems erika rtos has support for it so when I get chance I'm going to read up on it. Erika (http://erika.tuxfamily.org) also supports STM32F4DISCOVERY board too. That might make it easier to cr...

Mouser is $4.67 in qty 1; $4.41 for 10; $4.16 for 25.

Freescale has > 100 MCZ33810EK available for $3.62 for qty 1-25. I have a Freescale account if anyone is interested.

AFAIK it's BGA.

However, I've noticed a trend in some communique suggesting pre-pop boards, so the few things that might need good reflow might be able to be performed in advance?

Can't say much, but the new one should be better than the LS1224 as found on the LaunchXL2-TMS57012.
If there's any interest, I'll post more information as it comes to me, and I'm permitted to do so.

It's quite common for an A/C compressor to cycle- if it doesn't cycle you probably have a problem. My '81 VW Scirocco did it; my '84 Chrysler Laser Turbo did it under ECU control during moderate to heavy acceleration; the '88 Toyota 4Runner does it; the 2000 F250 I used to drive for work as well as ...

No real need to measure the pressure building up, just knowing there's a leak is enough to tell you there's a problem.

If you apply pressure to a cylinder, the cooling system is full, and you get bubbles in the radiator, you have a problem.

Do you have the tools to perform a leak-down test?

If so, pressurizing the cylinders while monitoring the pressure in the cooling system will let you know right quick if the head gasket, cracked head or cracked block are an issue.

What features does the TMS chip have that make functional safety better, or decrease the chances of EMC issues? Functional safety -- redundant CPU with validation across the two processors to ensure the code is executing the same. AKA neutrinos are not manipulating the CPU's execution. EMC -- Does ...

kb1gtt wrote:Do you mean this http://www.st.com/web/en/catalog/tools/FM147/CL1794/SC961/SS1743/LN1900/PF261567?icmp=pf261567_pron_pr_feb2015&sc=safesil-pr

Just found that link, I have no idea what is inside yet.

What did you find?

Make sure to track your voltages...
... I think your system is 0-8v for most of the sensors.

5MGE and the offspring are good engines.

Seriously?

Do you ever really think about what you post before you click "submit"?

Injectors < ~6 ohm, typically 2-3, are low-Z; > 10 ohm, typically 12-16 are high-Z. 1K ohm or greater is almost unheard of. Mitsubishi and others are currently using low-Z injectors on some port-injected models, so like I mentioned, a bit of research... so on and so forth; you should be fine. *cheers*

Not sure I'd say "most" injectors are high impedance, but without numbers to prove it I won't say that. What I will say is that Toyota, Honda and most other manufacturers have used both low and high impedance injectors, so you do have to be careful; a little research would go a long ways h...

Thinking a bit more about this, I realized it sounded very familiar. I posted about this over 2 years ago: Jan. 16, 2013- http://ecu.zeeff.com/viewtopic.php?f=21&t=214&sid=0b5f9992d5c61f970f5dec5527bde082 The article I linked to at Ford's site at the time is dead. However, https://media.ford...

More overhead for the processor to work with... and didn't you recently say something about the STM is running out of CS pins?

yep, you did... http://rusefi.com/forum/viewtopic.php?f=4&t=805&start=10#p13878

@kb1gtt - Find the "safety" compliance docs for STM32F4 yet?
Their suggestions for how to meet stuff and such are an interesting read.

I think the horse is dead; stop beating it.


Anyhow, if Andrey wants to fork for TMS, so be it. That doesn't mean STM32 is dead.

*cheers*

Back on topic.... Point being you can't assume the values you might get on a test bench will transfer directly to, and be immediately applicable to your vehicle unless that test bench has your entire intake tract in place EXACTLY as it sits in your vehicle. Yes and no ;) Yes I agree that testing in...

I spent some time thinking about this and I think this thread is an awesome discussion. I just spent about 4 hours bouncing back and forth trying to organize my thoughts, directly addressing (and contradicting) some of what you posted, only to arrive at the following. ;) I think it would have been ...

russian wrote:Thank you @ for sending me two LAUNCHXL2-TMS57012!

Not sure if it's been mentioned or considered, but even if you get raw transfer data, or frequency information, from a flow bench, that information is only valid on THAT flow bench. A change in duct shape or a bend, no matter how subtle, can create reversion which affects the sensor reading without...

@spags - sorry, I do not have any information for freq out MAF sensors. Not sure if it's been mentioned or considered, but even if you get raw transfer data, or frequency information, from a flow bench, that information is only valid on THAT flow bench. A change in duct shape or a bend, no matter ho...

... every MAF I've seen matches an exponential function....

Does that apply to both types of MAF sensors... frequency and current?