Search found 3758 matches
- Sat Jan 02, 2021 12:32 pm
- Forum: Dev: Hardware
- Topic: Discrete components VR decoder with zero firmware code
- Replies: 69
- Views: 66395
Re: Discrete components VR decoder with zero firmware code
PWM / DAC should be before the opamp.
- Sat Jan 02, 2021 11:47 am
- Forum: Dev: Hardware
- Topic: Discrete components VR decoder with zero firmware code
- Replies: 69
- Views: 66395
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...
- Thu Dec 31, 2020 10:52 am
- Forum: Misc
- Topic: Handy tool(s)
- Replies: 0
- Views: 8230
Handy tool(s)
LCR tweezers are handy
https://www.seeedstudio.com/Mini-Digital-Tweezers-DT71-p-4696.html
https://www.seeedstudio.com/Mini-Digital-Tweezers-DT71-p-4696.html
- Mon Dec 28, 2020 5:47 pm
- Forum: Dev: Software
- Topic: Limp Home and Engine Protection
- Replies: 18
- Views: 26572
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...
- Sun Dec 27, 2020 11:55 pm
- Forum: Dev: Software
- Topic: Limp Home and Engine Protection
- Replies: 18
- Views: 26572
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.
- Sun Dec 27, 2020 2:11 am
- Forum: Dev: Hardware
- Topic: Hina, Lowcost ECU
- Replies: 6
- Views: 5681
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.
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.
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 -->...
- Sat Dec 26, 2020 10:35 pm
- Forum: Dev: Software
- Topic: Limp Home and Engine Protection
- Replies: 18
- Views: 26572
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...
- Thu Dec 17, 2020 11:07 am
- Forum: Dev: Hardware
- Topic: VR emulator for board soldering validation
- Replies: 13
- Views: 8793
Re: VR emulator
Looks like jlc has shift registers.
https://jlcpcb.com/parts/componentSearch?searchTxt=Shift%20Registers
https://jlcpcb.com/parts/componentSearch?searchTxt=Shift%20Registers
- Thu Dec 17, 2020 11:03 am
- Forum: Dev: Hardware
- Topic: VR emulator for board soldering validation
- Replies: 13
- Views: 8793
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.
- Thu Dec 17, 2020 3:33 am
- Forum: Dev: Hardware
- Topic: VR emulator for board soldering validation
- Replies: 13
- Views: 8793
Re: VR emulator
Doesn't the discovery have a headphone jack?
- Sat Dec 12, 2020 1:15 pm
- Forum: Dev: Hardware
- Topic: Discrete components VR decoder with zero firmware code
- Replies: 69
- Views: 66395
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
https://rusefi.com/wiki/index.php?title=Manual:Hardware_Trigger&oldid=2806#VR_lower_level_details.2C_formulas.2C_app_notes.2C_etc
- Sat Dec 12, 2020 1:13 pm
- Forum: Dev: Hardware
- Topic: Discrete components VR decoder with zero firmware code
- Replies: 69
- Views: 66395
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?
- Sat Dec 05, 2020 10:43 am
- Forum: Dev: Hardware
- Topic: Discrete components VR decoder with zero firmware code
- Replies: 69
- Views: 66395
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.
- Tue Dec 01, 2020 3:03 am
- Forum: Dev: Hardware
- Topic: Discrete components VR decoder with zero firmware code
- Replies: 69
- Views: 66395
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?
- Mon Nov 30, 2020 7:21 pm
- Forum: Dev: Hardware
- Topic: Discrete components VR decoder with zero firmware code
- Replies: 69
- Views: 66395
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.
- Mon Nov 30, 2020 10:34 am
- Forum: Misc
- Topic: JLC better parts search
- Replies: 3
- Views: 4293
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...
- Mon Nov 30, 2020 4:19 am
- Forum: Dev: Hardware
- Topic: Discrete components VR decoder with zero firmware code
- Replies: 69
- Views: 66395
- Mon Nov 30, 2020 4:14 am
- Forum: You and your build
- Topic: 1998 BMW V12 engine M73 #55
- Replies: 142
- Views: 122872
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...
- Fri Nov 27, 2020 10:35 pm
- Forum: Dev: Hardware
- Topic: EFI for small engines
- Replies: 118
- Views: 106544
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 ...
- Wed Nov 25, 2020 7:54 pm
- Forum: You and your build
- Topic: 2006 Volkswagen Passat 2.0 Turbo GDI test mule #64
- Replies: 181
- Views: 368350
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.
- Mon Nov 16, 2020 10:38 am
- Forum: You and your build
- Topic: 2006 Volkswagen Passat 2.0 Turbo GDI test mule #64
- Replies: 181
- Views: 368350
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.
- Sun Nov 15, 2020 9:17 pm
- Forum: You and your build
- Topic: FrankenFerrari - V12 Ferrari 308
- Replies: 198
- Views: 164789
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
https://octopart.com/1n4734a-on+semiconductor-1310081
- Sun Nov 15, 2020 8:16 pm
- Forum: You and your build
- Topic: FrankenFerrari - V12 Ferrari 308
- Replies: 198
- Views: 164789
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...
- Tue Nov 10, 2020 10:35 am
- Forum: You and your build
- Topic: 1998 BMW V12 engine M73 #55
- Replies: 142
- Views: 122872
Re: 1998 BMW V12 engine M73 #55
Grinder seems like a good plan
- Fri Nov 06, 2020 9:57 pm
- Forum: You and your build
- Topic: 2006 Volkswagen Passat 2.0 Turbo GDI test mule #64
- Replies: 181
- Views: 368350
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.
- Tue Nov 03, 2020 7:54 pm
- Forum: Dev: Software
- Topic: Canbus universal gauge and tuning aid
- Replies: 5
- Views: 5974
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.
- Fri Oct 30, 2020 5:39 pm
- Forum: Dev: Hardware
- Topic: Wideband Controller: Fully Custom, no ASIC!
- Replies: 204
- Views: 469163
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...
- Fri Oct 30, 2020 5:30 pm
- Forum: Dev: Software
- Topic: rusEfI based on STM32F4 (Frankenso) for air-cooled small vehicles
- Replies: 23
- Views: 12781
Re: rusEfI based on STM32F4 (Frankenso) for air-cooled small vehicles
What opamp are you using? Opamps do not go to the rails, as well there are things like offset, and gain which are important. Plenty of opamps can actually drive to the rails - the MCP6004 used on Frankenso, MRE, and Proteus can, for example. The opamp's open loop gain is largely unimportant, as nob...
- Fri Oct 30, 2020 1:22 am
- Forum: Dev: Software
- Topic: rusEfI based on STM32F4 (Frankenso) for air-cooled small vehicles
- Replies: 23
- Views: 12781
Re: rusEfI based on STM32F4 (Frankenso) for air-cooled small vehicles
What opamp are you using? Opamps do not go to the rails, as well there are things like offset, and gain which are important. What program is this done in? Could you share the native file format? I'm assuming your program can do things like highlighting a net, which is handy when trying to track tagg...