Search found 3764 matches
- Mon Jul 08, 2024 5:25 pm
- Forum: Universal Boards
- Topic: Mechanical pump control
- Replies: 5
- Views: 1262
Re: Mechanical pump control
I suspect it's simple enough control that flexIO could do it. I think it's almost the same as taking RPM and spitting that out as an analog or PWM output.
- Thu Jun 06, 2024 8:02 pm
- Forum: User Support
- Topic: Incorrect Number of Sparks during 12-1 Trigger
- Replies: 13
- Views: 2086
Re: Incorrect Number of Sparks during 12-1 Trigger
Sparkes on exhaust as well as on combustion. It was a common technique on older engines with mechanical timing.
However high revs are likely a problem with extra spark in 4 stroke. It's likely to not enough time build a magnet field.
However high revs are likely a problem with extra spark in 4 stroke. It's likely to not enough time build a magnet field.
- Wed May 15, 2024 11:53 pm
- Forum: You and your build
- Topic: 99 Honda VFR800, PnP ECU NOW turbo EVENTUALLY
- Replies: 49
- Views: 58350
Re: 99 Honda VFR800, PnP ECU NOW turbo EVENTUALLY
Oh I see analog improvements in that circuit. It's more then just a comparator. Good to see that evolution.
- Wed May 15, 2024 4:53 pm
- Forum: You and your build
- Topic: 99 Honda VFR800, PnP ECU NOW turbo EVENTUALLY
- Replies: 49
- Views: 58350
Re: 99 Honda VFR800, PnP ECU NOW turbo EVENTUALLY
If VR is to hot, can you add a gap? Perhaps add a spacer or something like that. Increasing the gap will dampen the signal.
- Wed May 15, 2024 4:50 pm
- Forum: You and your build
- Topic: 99 Honda VFR800, PnP ECU NOW turbo EVENTUALLY
- Replies: 49
- Views: 58350
Re: 99 Honda VFR800, PnP ECU NOW turbo EVENTUALLY
I don't think we've seen a to hot VR yet. There was a Honeywell guide which caused that resistor to be a thing. The Honeywell guide predicted VR signals could go very hot. However that's at a 0 gap with a VR you hand made. I don't think we've seen a purchased VR which was capable of overpowering the...
- Tue May 07, 2024 3:06 am
- Forum: Misc
- Topic: Open sourced car
- Replies: 0
- Views: 2365
Open sourced car
Seems interesting. Hope it goes places.
- Mon Jan 22, 2024 4:35 pm
- Forum: You and your build
- Topic: honda obd1 on uaefi
- Replies: 3
- Views: 6351
Re: honda obd1 on uaefi
Video or it didn't exist
Cool to see uaEFI.
Cool to see uaEFI.
- Wed Oct 11, 2023 2:35 pm
- Forum: Dev: Hardware
- Topic: VR + knock module
- Replies: 69
- Views: 183125
Re: VR + knock module
I recall Honeywell has a good paper which details a bunch of math for VR. I also recall we have a copy on the wiki. That paper might help you. I once made a spreadsheet with that math in it. However that may have not been migrated when the wiki migrated to GitHub. See notes in this thread https://ru...
- Wed Oct 04, 2023 5:06 am
- Forum: Dev: Hardware
- Topic: Manufacturing options
- Replies: 27
- Views: 75990
Re: Manufacturing options
Cnc thru hole machine video below.
- Fri Sep 29, 2023 3:47 pm
- Forum: Dev: Hardware
- Topic: VR + knock module
- Replies: 69
- Views: 183125
Re: VR + knock module
I get this error when I try the simulation. Where did you get this lib from? Error: Could not find include file D:/Elektronika/Spice/Models/Comparators/LM393A.lib I did not find this lib on my C:\ on my KC7 WIN10 64bit install. I got a TI SPICE from below, then updated the links for both chips to po...
- Thu Sep 28, 2023 9:55 pm
- Forum: Dev: Hardware
- Topic: VR + knock module
- Replies: 69
- Views: 183125
- Sat Sep 16, 2023 9:48 am
- Forum: Dev: Hardware
- Topic: Vibration vibro test
- Replies: 14
- Views: 28936
Re: Vibration vibro test
I've pondered the prospects of an RTV mold used with technomelt potting compound. Basically make custom potting cup, put technomelt in cup with PCB, then put in toaster oven. After heat cycle you've got fully potted board.
- Sat Sep 09, 2023 2:14 am
- Forum: Dev: Hardware
- Topic: Digital CDI for large engines
- Replies: 25
- Views: 79284
Re: Digital CDI for large engines
Hmmm 700+ v spikes. That's likely your problem. Were was that trace measuring?
- Tue Sep 05, 2023 1:07 am
- Forum: You and your build
- Topic: 1999 Dodge Dakota
- Replies: 2
- Views: 16343
Re: 1999 Dodge Dakota
I'm trying to draft a fuel tune. Currently VE is 60% across the board. Any suggestions on how to guess better VE values? It doesn't have a WO2 yet. I've got a 14point7 WO2 with sensor kicking around. I guess if I ignore the humidity issues, I could just clamp it to the outlet and that would get me a...
- Tue Sep 05, 2023 12:31 am
- Forum: You and your build
- Topic: 1999 Dodge Dakota
- Replies: 2
- Views: 16343
Re: 1999 Dodge Dakota
The below is R0.1, beware IGNITION WARNING hazard. The ignitor is internal to the ECU, and this board does not properly isolate that voltage. Breakout board pictures https://github.com/jharvey/1999_Dodge_Dakota/blob/master/export/Breakout/V0.1/Pictures/Connector_Side_1000wide.jpg?raw=true https://gi...
- Tue Sep 05, 2023 12:31 am
- Forum: You and your build
- Topic: 1999 Dodge Dakota
- Replies: 2
- Views: 16343
1999 Dodge Dakota
This a thread for a 1999 Dodge Dakota, V6 3.9L 4X4 with a history where several mechanics have failed to get it running. Frame and mechanicals are in decent condition, but ECU does not turn on fuel pump relay. It can run on starter fluid. This is in early days of OBD stuff. I've not found a reliable...
- Tue Sep 05, 2023 12:20 am
- Forum: User Support
- Topic: rusEFI online
- Replies: 19
- Views: 50034
Re: rusEFI online
I attempt to upload and I get this error message. online_error.png Bundle was found here https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_proteus_f7.zip I originally got the F4 version. That console.exe wanted me to install JRE11. Then it complained about F7, and now F7 provid...
- Tue Aug 29, 2023 9:16 am
- Forum: Dev: Hardware
- Topic: Digital CDI for large engines
- Replies: 25
- Views: 79284
Re: Digital CDI for large engines
Scope traces? It's hard to guess when we have little data. If you scope it out, then make sure you using 10X scale or make sure you have a probe capable of 400+V. Often a 10X probe can handle around 400V. So beware and keep an eye on the voltage capability if you try to use a scope. I might guess yo...
- Mon Aug 28, 2023 8:55 am
- Forum: Dev: Hardware
- Topic: Digital CDI for large engines
- Replies: 25
- Views: 79284
- Mon Aug 28, 2023 12:57 am
- Forum: Dev: Hardware
- Topic: Digital CDI for large engines
- Replies: 25
- Views: 79284
Re: Digital CDI for large engines
I recall a QUCS or ltsoice simulation somewhere. Perhaps this would be worth attempting to simulate it.
- Sun Aug 13, 2023 11:57 am
- Forum: Misc
- Topic: contact-less CAN reader
- Replies: 5
- Views: 19712
Re: contact-less CAN reader
Similar but different. It's an ESP32 wireless can bus gateway.
- Tue Jul 04, 2023 9:58 am
- Forum: Dev: Hardware
- Topic: Digital CDI for large engines
- Replies: 25
- Views: 79284
Re: Digital CDI for large engines
The cap and transformer are going to prevent some level of energy from converting into spark energy. Keep in mind the stored energy is a max available energy.
Hmmm. That pic circuit look very similar to the direct injection driver boost circuit.
Hmmm. That pic circuit look very similar to the direct injection driver boost circuit.
- Sat Jul 01, 2023 10:21 am
- Forum: Dev: Hardware
- Topic: Digital CDI for large engines
- Replies: 25
- Views: 79284
Re: CDI
On small engines I think spark duration and energy are mostly fixed. Components are selected and the trigger signal is also fixed. However I understand that you can get a certain level of control. With CDI you basically charge a cap, then you quickly discharge the cap through a step up transformer. ...
- Sat Jun 17, 2023 1:34 am
- Forum: You and your build
- Topic: 2014 red kia rio 1.6 GDI M/T busted dreams
- Replies: 55
- Views: 208716
Re: 2014 red kia rio 1.6 GDI M/T busted dreams
Oh also the scope might be set to something like 10x I think it wants to be set to 1x. Would you expect it's really 4.2A instead of 42A?
- Sat Jun 17, 2023 1:28 am
- Forum: You and your build
- Topic: 2014 red kia rio 1.6 GDI M/T busted dreams
- Replies: 55
- Views: 208716
Re: 2014 red kia rio 1.6 GDI M/T busted dreams
You can change the scale on the scope to avoid the need to calc this in your head. It can read on screen directly in amps. Also it's measuring magnetic flux. Verify that it reads 0 when the probe is in the same area, but without a wire in the loop. AKA a near by motor or similar magnetic field can i...
- Mon Jun 05, 2023 10:14 am
- Forum: Misc
- Topic: Misc programing
- Replies: 0
- Views: 37956
Misc programing
Some tips about how NASA makes reliable code found in this video.
- Mon May 01, 2023 12:00 am
- Forum: Dev: Hardware
- Topic: Discrete components VR decoder with zero firmware code
- Replies: 69
- Views: 77183
Re: Discrete components VR decoder with zero firmware code
The drafted schematic has many issues. I'd also like if the diodes clamped to gnd instead of the +5 rail. In other similar circuits, I've seen that clamped energy self power the 5v and override the ability to shut off the 5v. So I typically either avoid that style of clamp or I add something like a ...
- Sun Apr 30, 2023 9:32 pm
- Forum: Dev: Hardware
- Topic: Discrete components VR decoder with zero firmware code
- Replies: 69
- Views: 77183
Re: Discrete components VR decoder with zero firmware code
Is phase shift a concern? I guess that would probably get compensated for during tuning.
- Sun Apr 30, 2023 5:04 pm
- Forum: Dev: Hardware
- Topic: Discrete components VR decoder with zero firmware code
- Replies: 69
- Views: 77183
Re: Discrete components VR decoder with zero firmware code
Jared says Still in early stages of noodling this over, but this might mostly work. I basically just split off the op-amps to have a virtual ground. I think this would likely allow for a 1 wire VR, connect VR+ to GND, then VR- would be the other VR wire. Granted in 1 wire mode, it would have a lowe...
- Tue Jan 31, 2023 5:27 pm
- Forum: Dev: Hardware
- Topic: S105 OEM ECU
- Replies: 20
- Views: 47259
Re: S105 OEM ECU
Oops. I just updated the math. Thanks for the clarification. It's still significant heat to deal with.chaoschris wrote: ↑Tue Jan 31, 2023 7:23 am@ kb1gtt : The resistors are in parallel, so the resistance is 0,33 Ohm...