Search found 3703 matches

by kb1gtt
Mon Jan 11, 2021 10:00 pm
Forum: You and your build
Topic: 1987 Jeep YJ - Wrangler - i6 amc258 4.2L
Replies: 5
Views: 139

Re: 1987 Jeep YJ - Wrangler - i6 amc258 4.2L

He asks if mine runs..... It probably would have a couple years ago. It's just a VIN to me. A project some day, and it has the little bits which I can transfer over. Things like tail lights, fiberglass top, windshield, etc. For now it's just yard art. I plan a tube frame, new tub, etc. I do not know...
by kb1gtt
Mon Jan 11, 2021 2:52 am
Forum: You and your build
Topic: 1987 Jeep YJ - Wrangler - i6 amc258 4.2L
Replies: 5
Views: 139

Re: 1987 Jeep YJ - Wrangler - i6 amc258 4.2L

I have a 1995 YJ, 4cyl which I bought for the VIN. Do you have any suggestions? I dream of making it a direct injection diesel, with tube frame and new tub. What are your dreams for yours?

Is your mostly stock?
by kb1gtt
Sat Jan 02, 2021 12:32 pm
Forum: Dev: Hardware
Topic: Discrete components VR decoder with zero firmware code
Replies: 44
Views: 2193

Re: Discrete components VR decoder with zero firmware code

PWM / DAC should be before the opamp.
by kb1gtt
Sat Jan 02, 2021 11:47 am
Forum: Dev: Hardware
Topic: Discrete components VR decoder with zero firmware code
Replies: 44
Views: 2193

Re: Discrete components VR decoder with zero firmware code

Perhaps vref source could be optional PWM / DAC input? I know the goal is no firmware, but having a software adjustable threshold is likely a desirable feature. These PWM / DAC are handy as you can PWM digitally or if you have a DAC you can just DAC the thing. This would allow for an adjustable thre...
by kb1gtt
Thu Dec 31, 2020 10:52 am
Forum: Misc
Topic: Handy tool(s)
Replies: 0
Views: 66

Handy tool(s)

by kb1gtt
Mon Dec 28, 2020 5:47 pm
Forum: Dev: Software
Topic: Limp Home and Engine Protection
Replies: 15
Views: 568

Re: Limp Home and Engine Protection

I guess error check the temperature profile and trigger an error. Aka if engine is not warm after 10 minutes then limit power. Frozen block, loss of coolant, broken sensor can cause bad temp readings. Limit power to limit the damage. I guess the same for a stuck thermostat. Wrong profile could cause...
by kb1gtt
Sun Dec 27, 2020 11:55 pm
Forum: Dev: Software
Topic: Limp Home and Engine Protection
Replies: 15
Views: 568

Re: Limp Home and Engine Protection

Hmmmm if etb claims 0% yet MAF = WOT then limit fuel to 10% or ignore high sensor and only use lower power sensor or do something like that.
by kb1gtt
Sun Dec 27, 2020 2:11 am
Forum: Dev: Hardware
Topic: Hina, Lowcost ECU
Replies: 6
Views: 342

Re: Hina, Lowcost ECU

DB37 = evil.

How much lower cost is this than a TLE8888? I see thru hole, so that's expensive. STM32 with TLE8888 is about all you need, and it's reasonably low cost.
by kb1gtt
Sun Dec 27, 2020 2:08 am
Forum: Misc
Topic: KICAD
Replies: 33
Views: 11752

Re: KICAD

Here are some notes about how I merged two kicad projects (both schematics and PCB) in KC5. -- Copy one project as a startting point, AKA PT2000 --> TestMergeProject -- Delete extra files, .csv, gerbers, .net, etc. Modify files like knownissues.txt -- Rename core files AKA Common_Rail_PT2000.XXX -->...
by kb1gtt
Sat Dec 26, 2020 10:35 pm
Forum: Dev: Software
Topic: Limp Home and Engine Protection
Replies: 15
Views: 568

Re: Limp Home and Engine Protection

-- If rpm rate of change is bad 5krpm to 0rpm in one rotation then cut fuel pump. -- if over temp then limit hp or do something to protect the engine -- if speed density sensor failure, then switch to alpha-n or average two fuel algos or something like that. -- if unreasonably air temp then ??? -- i...
by kb1gtt
Thu Dec 17, 2020 11:07 am
Forum: Dev: Hardware
Topic: VR emulator for board soldering validation
Replies: 11
Views: 442

Re: VR emulator

by kb1gtt
Thu Dec 17, 2020 11:03 am
Forum: Dev: Hardware
Topic: VR emulator for board soldering validation
Replies: 11
Views: 442

Re: VR emulator

How about 36 dip switches connected to a shift register so you can emulate a 36-1 wheel? 100% hardware and emulates a common crank pattern.
by kb1gtt
Thu Dec 17, 2020 3:33 am
Forum: Dev: Hardware
Topic: VR emulator for board soldering validation
Replies: 11
Views: 442

Re: VR emulator

Doesn't the discovery have a headphone jack?
by kb1gtt
Sat Dec 12, 2020 1:15 pm
Forum: Dev: Hardware
Topic: Discrete components VR decoder with zero firmware code
Replies: 44
Views: 2193

Re: Discrete components VR decoder with zero firmware code

This is where it used to be, see the history on this page, it has a honeywell app note, spreadsheet, and many details about VR's.
https://rusefi.com/wiki/index.php?title=Manual:Hardware_Trigger&oldid=2806#VR_lower_level_details.2C_formulas.2C_app_notes.2C_etc
by kb1gtt
Sat Dec 12, 2020 1:13 pm
Forum: Dev: Hardware
Topic: Discrete components VR decoder with zero firmware code
Replies: 44
Views: 2193

Re: Discrete components VR decoder with zero firmware code

How do you search the new wiki for content? I know there was a honeywell app note and spreadsheet that was on the old wiki, it also detailed many specs of the typical VR sensor. I used to search the old forum for "300V VR" but that does not work any more. How do I find it on the new wiki?
by kb1gtt
Sat Dec 05, 2020 10:43 am
Forum: Dev: Hardware
Topic: Discrete components VR decoder with zero firmware code
Replies: 44
Views: 2193

Re: Discrete components VR decoder with zero firmware code

Pictures can be uploaded to the rusefi forum. You do not need the external service to host the pictures.
by kb1gtt
Tue Dec 01, 2020 3:03 am
Forum: Dev: Hardware
Topic: Discrete components VR decoder with zero firmware code
Replies: 44
Views: 2193

Re: Discrete components VR decoder with zero firmware code

Do you have a simulation for this? I'm not fully following how parts of it work. I'm concerned that it would be weak against common mode noise. Can it be adjusted to use the opamp as a differential input?
by kb1gtt
Mon Nov 30, 2020 7:21 pm
Forum: Dev: Hardware
Topic: Discrete components VR decoder with zero firmware code
Replies: 44
Views: 2193

Re: Discrete components VR decoder with zero firmware code

Would dedicated STM32 that is independent of rusEFI firmware an OK solution, or does that also cross the no firmware solution? AKA dedicated chip, instead of integrated solution.
by kb1gtt
Mon Nov 30, 2020 10:34 am
Forum: Misc
Topic: JLC better parts search
Replies: 3
Views: 455

JLC better parts search

This is an article about a tool that helps with searching JLC parts. https://hackaday.com/2020/10/11/improved-part-searches-for-jlcpcb-parts/ The general process is that you browse to the below page, you click the update in the top, then wait for a while to download and update and add the components...
by kb1gtt
Mon Nov 30, 2020 4:14 am
Forum: You and your build
Topic: 1998 BMW V12 engine M73 #55
Replies: 115
Views: 35439

Re: 1998 BMW V12 engine M73 #55

These are snippets found in the below link. Of course if they said it on the internet, it must be true. https://www.theglobeandmail.com/globe-drive/culture/commentary/the-problem-with-ethanol-in-gasoline/article29103634/ Because it is an alcohol, ethanol dries out the rubber components in a fuel sys...
by kb1gtt
Fri Nov 27, 2020 10:35 pm
Forum: Dev: Hardware
Topic: EFI for small engines
Replies: 118
Views: 31655

Re: EFI for small engines

The MRE is very small as is. The TLE8888 chip is fairly small. Sure we could save some space with different less capable chips, but not very much. Perhaps the size of your thumb nail. Why is MRE to large? My lawn mower and snow blower wheel's are not going to buckle under the weight of MRE. Perhaps ...
by kb1gtt
Wed Nov 25, 2020 7:54 pm
Forum: You and your build
Topic: 2006 Volkswagen Passat 2.0 Turbo GDI test mule #64
Replies: 56
Views: 10926

Re: 2006 Volkswagen Passat 2.0 Turbo GDI test mule

Hmmm, 3.3 may also be a concern. I would suggest changing to all 2.2 if you can stomach it.
by kb1gtt
Mon Nov 16, 2020 10:38 am
Forum: You and your build
Topic: 2006 Volkswagen Passat 2.0 Turbo GDI test mule #64
Replies: 56
Views: 10926

Re: 2006 Volkswagen Passat 2.0 Turbo GDI test mule

While your at it I suggest changing the oil prosper switch. It's cheap and a bigger to change. I also understand the injectors will be stuck. You might want to consider just breaking then all out and replace them. I understand even with the head off they are difficult to get out.
by kb1gtt
Sun Nov 15, 2020 9:17 pm
Forum: You and your build
Topic: FrankenFerrari - V12 Ferrari 308
Replies: 112
Views: 18000

Re: FrankenFerrari - V12 Ferrari 308

Perhaps put a 5.6V Zener or similar voltage limiter on the output of U14. Perhaps something like this. I have not check the watts, so I'm not sure this 1W would be OK, but something like this could be added to clamp the voltage.
https://octopart.com/1n4734a-on+semiconductor-1310081
by kb1gtt
Sun Nov 15, 2020 8:16 pm
Forum: You and your build
Topic: FrankenFerrari - V12 Ferrari 308
Replies: 112
Views: 18000

Re: FrankenFerrari - V12 Ferrari 308

In Figure 3 of the below PDF, it notes with +/-5V (a 10V swing) you only get 6V range, so I expect you loose about 2V on the low side and about 2V on the high side. The range is often not exactly centered, in your case it appears yours is 1.5V from the bottom rail. https://www.st.com/resource/en/dat...
by kb1gtt
Tue Nov 10, 2020 10:35 am
Forum: You and your build
Topic: 1998 BMW V12 engine M73 #55
Replies: 115
Views: 35439

Re: 1998 BMW V12 engine M73 #55

Grinder seems like a good plan ;)
ItalianToastedSubGrinderPrint.jpg
ItalianToastedSubGrinderPrint.jpg (447.39 KiB) Viewed 1595 times
by kb1gtt
Fri Nov 06, 2020 9:57 pm
Forum: You and your build
Topic: 2006 Volkswagen Passat 2.0 Turbo GDI test mule #64
Replies: 56
Views: 10926

Re: 2006 Volkswagen Passat 2.0 Turbo GDI test mule

Yeah, the old push before you pull, that's huge with those connectors. I often give a dab of WD40 to help break them free on the push.
by kb1gtt
Tue Nov 03, 2020 7:54 pm
Forum: Dev: Software
Topic: Canbus universal gauge and tuning aid
Replies: 5
Views: 527

Re: Canbus universal gauge and tuning aid

Very nice. The LCD looks nice and bright. I'd be that can be seen well in daylight. It has a decent refresh rate as well.
by kb1gtt
Fri Oct 30, 2020 5:39 pm
Forum: Dev: Hardware
Topic: Wideband Controller: Fully Custom, no ASIC!
Replies: 41
Views: 2348

Re: Wideband Controller: Fully Custom, no ASIC!

Looks like allot of the schematic is very similar to this one Waltech did, except STM32 instead of AVR. Good to see a more useful version of the design being done. https://waltech.com/cszcms/wide-band-oxygen-sensor-project-report Once a standalone board is done, could this be merged native rusEFI fi...