Search found 386 matches

by abecedarian
Thu Dec 25, 2014 9:03 am
Forum: Misc
Topic: Happy Holidays!
Replies: 7
Views: 8344

Happy Holidays!

I wish everyone the best for the future!
by abecedarian
Thu Dec 25, 2014 9:00 am
Forum: Dev: Hardware
Topic: Ignition modules
Replies: 71
Views: 63766

Re: Ignition modules

These LSx style coils are the original reason why the Frank boards have the TC4427 HI/LO drivers. That chip allows you to drive to 12V and GND, which works well for external ignitors like this, or if you have an old school coil, you can also drive things like the J701. I haven't seen an external ig...
by abecedarian
Thu Dec 25, 2014 6:58 am
Forum: Dev: Hardware
Topic: Thermocouple input?
Replies: 54
Views: 42030

Re: Thermocouple input?

so now it comes to building the circuit... :-) ads1118 - i checked, aliexpresssells it for 45$ per 10. ebay sells 10$ per 5 - strange, isn'it? as for psoc - if it is s cheap, why isn't it used by everyone? as far as i get it alan to uses it for his o2 controlers... ADS1118 on ebay are $3 for 1, $10...
by abecedarian
Thu Dec 25, 2014 6:32 am
Forum: Dev: Hardware
Topic: MAP sensor module
Replies: 28
Views: 23541

Re: MAP sensor module

Yeah, I'm drawing in Eagle. The board I'm thinking of doing would be a 2-layer, 5cm^2 module, maybe smaller once I start on and optimize layout. The thought here is many board fabs have price breaks and such, and that is a common size for many 'generic' modules, easy to panelize and such, and I am p...
by abecedarian
Wed Dec 24, 2014 4:42 am
Forum: Dev: Hardware
Topic: Thermocouple input?
Replies: 54
Views: 42030

Re: Thermocouple input?

russian wrote:
puff wrote:you mean adding extra discovery or avoiding can?
I do not follow
Seriously, I don't think many understand the issues regarding temperatures, dissimilar metals and current flow, either.
by abecedarian
Wed Dec 24, 2014 4:38 am
Forum: Dev: Hardware
Topic: 3D printing ECU case - cost?
Replies: 72
Views: 72526

Re: 3D printing ECU case - cost?

Concerns with EMI are based on if you expect to emiter radiate radio frequencies, of if you expect your board to be effected by possible near by radio frequencies. You can use plastic enclosures if you expect the RF is not a problem. If it is going to be a problem, you typically need the metal encl...
by abecedarian
Wed Dec 24, 2014 4:31 am
Forum: Dev: Hardware
Topic: MAP sensor module
Replies: 28
Views: 23541

Re: MAP sensor module

russian wrote:Is that KiCad? Would be best to have something in KiCad to be in sync with all the stuff here...
No, not KiCad. Just an image of a schematic I've been working on as part of a TMS570 thing.
by abecedarian
Wed Dec 24, 2014 4:21 am
Forum: Dev: Hardware
Topic: MAP sensor module
Replies: 28
Views: 23541

Re: MAP sensor module

Anyhow....
M+B_board.png
M+B_board.png (22.17 KiB) Viewed 22539 times
A lot of DNP resistors to maybe provoke some sense of resistor / op-amp divider / buffering options, since it is an 'off board' intended thing, and who knows what's on-board?

Jared?
by abecedarian
Wed Dec 24, 2014 4:19 am
Forum: Dev: Hardware
Topic: MAP sensor module
Replies: 28
Views: 23541

Re: MAP sensor module

Well -6400 is good from 40-400 kPa, or round-about that... -6115 is good from 10-115 kPa, give or take. Looks like N/A applications would prefer 6115? From PCB standpoint, does it matter? In case if the device footprint is the same we can call it 6115 and imply that 6400 could be used in place and ...
by abecedarian
Wed Dec 24, 2014 3:39 am
Forum: Dev: Hardware
Topic: MAP sensor module
Replies: 28
Views: 23541

Re: MAP sensor module

Well
-6400 is good from 40-400 kPa, or round-about that...
-6115 is good from 10-115 kPa, give or take.

There is a 3v version of the 6115, but makes things complicated.
by abecedarian
Wed Dec 24, 2014 3:07 am
Forum: Dev: Hardware
Topic: Ignition modules
Replies: 71
Views: 63766

Re: Ignition modules

IGBT's have high side drive and low side drive just like MOSFET's. The low side with a +V logic level are the most common, just like a MOSFET. Also just like a MOSFET, they do have benefits of being driven hard to +V and GND. The short way to explain this, is that an IGBT is basically a MOSFET that...
by abecedarian
Tue Dec 23, 2014 10:49 pm
Forum: Dev: Hardware
Topic: Ignition modules
Replies: 71
Views: 63766

Re: Ignition modules

So why include many IGBT's on the board for someone who... ... likely has a distributor and likely only has one ignition coil because of that? Me thinks trying to solve TOO MANY things with one solution only convolutes, and dilutes, what that solution can be. Perhaps: - one RUSEFI board for Ketterin...
by abecedarian
Tue Dec 23, 2014 10:42 pm
Forum: Dev: Hardware
Topic: Ignition modules
Replies: 71
Views: 63766

Re: Ignition modules

So, someone is editing my posts? I don't mind if you do it, in so much as you let me know you are doing it. edited_posts.png Yes, I did correct your typo after asking you if that was a typo. As a matter of fact, I was a bit surprised you did not edit your own post before I did. You didn't ask me if...
by abecedarian
Tue Dec 23, 2014 10:38 pm
Forum: Dev: Hardware
Topic: MAP sensor module
Replies: 28
Views: 23541

Re: MAP sensor module

6400 is okay for 40-450 kPa, so decent for turbo/supercharged engines to ~38PSI boost or so. Not great kPa|mV resolution simply because of its nature. 6115 is probably more appropriate for N/A engines and Baro- same price, but more precise mV/kPa than the 6400. If I remember correctly, there are 3v ...
by abecedarian
Tue Dec 23, 2014 10:32 pm
Forum: Dev: Hardware
Topic: Ignition modules
Replies: 71
Views: 63766

Re: Ignition modules

So, someone is editing my posts?

I don't mind if you do it, in so much as you let me know you are doing it.
edited_posts.png
edited_posts.png (50.38 KiB) Viewed 22299 times
by abecedarian
Tue Dec 23, 2014 7:18 pm
Forum: Dev: Hardware
Topic: Thermocouple input?
Replies: 54
Views: 42030

Re: Thermocouple input?

How would CJT be accomplished, considering you're likely going from copper wire to zinc-plated copper in the forked & crimped-on connector, then who knows what the actual screw terminal is (stainless steel, zinc plated copper/aluminum), to the circuit board...?
by abecedarian
Tue Dec 23, 2014 7:14 pm
Forum: Dev: Hardware
Topic: Ignition modules
Replies: 71
Views: 63766

Re: Ignition modules

I agree that pencil style is good if you can work with it. The problem is that many people are looking of plug in OEM, or can't physically mount them under the hood. I think it's good to have many options, as one solution won't work for every application. Do you have a suggested of the shelf pencil...
by abecedarian
Sat Dec 20, 2014 8:33 pm
Forum: Misc
Topic: CAN-EGT 8 channel thermocouple interface
Replies: 40
Views: 30766

Re: CAN-EGT 8 channel thermocouple interface

I know this thread is about an 8 channel EGT thing... but think about the direction things may go, particularly if something like this is integrated into RUSEFI hardware. I wonder about providing 'pre-programmed' chips, as in PSoC3, or even PSoC4. How well would the program survive reflow or mountin...
by abecedarian
Fri Dec 19, 2014 7:16 pm
Forum: Misc
Topic: CAN-EGT 8 channel thermocouple interface
Replies: 40
Views: 30766

Re: CAN-EGT 8 channel thermocouple interface

Yup, 10 minutes at a time to look at things, and yes I missed that this has the internal sensor. I agree the AD chip does offer the option for CJT compensation. PSoC and the MAX chip have the same feature. The PSoC allows for an external sensor if so desired, which allows you to get a more accurate...
by abecedarian
Fri Dec 19, 2014 5:40 pm
Forum: Misc
Topic: CAN-EGT 8 channel thermocouple interface
Replies: 40
Views: 30766

Re: CAN-EGT 8 channel thermocouple interface

I don't see ICE calibration from that ADS1118 chip. Does it do that kind of compensation? I fear there is significant software that needs to be behind the ADS1118 to get valid readings. Also I don't see a temperature sensor in the chip itself, so you would need a separate temp sensor to measure the...
by abecedarian
Fri Dec 19, 2014 7:36 am
Forum: Misc
Topic: CAN-EGT 8 channel thermocouple interface
Replies: 40
Views: 30766

Re: CAN-EGT 8 channel thermocouple interface

do you think this one is good? http://www.ebay.com/itm/1M-0-800-Screw-Thread-Thermocouple-K-Type-For-Exhaust-Gas-Temperature-Probe/251735387847?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D27538%26meid%3Da845a46fac014973a1687fedeedbe9d6%26pid%3D100011%...
by abecedarian
Thu Dec 18, 2014 8:21 pm
Forum: Misc
Topic: CAN-EGT 8 channel thermocouple interface
Replies: 40
Views: 30766

Re: CAN-EGT 8 channel thermocouple interface

ADS1118 can sample two differential thermocouples (or 4 single ended) at 860 samples per second (faster than thermocouples tend to react) at 16 bit depth (MAX31855 is 14 bit), do open/short sensor detection, provides cold-junction compensation, and are ~$2 USD.

Just saying.
by abecedarian
Mon Dec 15, 2014 6:36 am
Forum: Misc
Topic: Maybe new rusefi target? TMS570
Replies: 96
Views: 78316

Re: Maybe new rusefi target? TMS570

Code Composer Studio, is free to download, and there is no code size limit Yes and no :( Looks like CCS is only free as long as you are using it with a dev board. If we want to have the chip right on our board suddenly we are not in the free part of the spectrum. I am basing this on: http://process...
by abecedarian
Sat Dec 13, 2014 9:32 am
Forum: Misc
Topic: Maybe new rusefi target? TMS570
Replies: 96
Views: 78316

Re: Maybe new rusefi target? TMS570

As far as I know: - Code Composer Studio, is free to download, and there is no code size limit - HalCoGen, the N2HET development stuff, is free to download, and has no limit for code size. HalCoGen would be used to configure N2HET and such; and its output files would be the basis for a CCS project. ...
by abecedarian
Fri Dec 12, 2014 8:55 am
Forum: Прошивка
Topic: TMS570
Replies: 6
Views: 9848

Re: TMS570

I hope you do not mind English here.

Maybe instead of TMS570LS0432 Hercules board, use http://www.ti.com/tool/LAUNCHXL2-TMS57012
... more than 2x faster with floating point math, more memory and a more friendly board which brings MCU pins out to single in-line headers.
by abecedarian
Thu Dec 11, 2014 11:17 pm
Forum: Misc
Topic: Maybe new rusefi target? TMS570
Replies: 96
Views: 78316

Re: Maybe new rusefi target? TMS570

New USD $20 TI dev kit based on TMS570LS1224 is available. - Automotive qualified processor (unlike STM32F4) - 180 MHz dual core / lockstep ARM R4F with single / double precision floating point unit - 1.25 MB program Flash, 192 KB RAM, 64 KB FLASH for EEPROM emulation <- the latter sounds like a goo...
by abecedarian
Sat Dec 06, 2014 2:18 pm
Forum: Misc
Topic: totally random junk
Replies: 2
Views: 4012

Re: totally random junk

Well at least they used insulated wire.

But that image could take "dead bug wiring" to a new level.
by abecedarian
Tue Dec 02, 2014 1:55 pm
Forum: Dev: Hardware
Topic: Crankshaft postion Sensors: VR or Hall?
Replies: 10
Views: 17776

Re: Crankshaft postion Sensors: VR or Hall?

"This low RPM also allows the ECU to decode the wheel quicker, often if you save the last known crank angle, you can use that as your starting point and get crank sync on the first tooth edge. AKA you can keep sync even if you turn the engine off for a week."

No you can't.
by abecedarian
Tue Dec 02, 2014 12:18 pm
Forum: Dev: Hardware
Topic: Crankshaft postion Sensors: VR or Hall?
Replies: 10
Views: 17776

Re: Crankshaft postion Sensors: VR or Hall?

Did you really think out your reply?
kb1gtt wrote:I've not owned a vehicle yet with a VR. I wonder if VR is more common on US vs foreign vehicles.
What does that matter?