Search found 256 matches

by Rhinoman
Thu Feb 22, 2018 2:52 pm
Forum: Dev: Hardware
Topic: DEAD DESIGN rusEfi own wide band controller board add-on using CJ125
Replies: 364
Views: 328991

Re: CJ125 board

The CJ125 uses the calibration resistor in the lambda sensor's connector so we shouldn't need to do any calibration.
by Rhinoman
Mon Jan 29, 2018 8:06 pm
Forum: Dev: Hardware
Topic: DEAD DESIGN rusEfi own wide band controller board add-on using CJ125
Replies: 364
Views: 328991

Re: CJ125 board

I don't think that you need to delete those components - its a fairly high frequency filter and the constant current source will maintain the correct current, maybe leave the positions and fit a 0R resistor if not required. From what I recall they are shown in another document.
by Rhinoman
Thu Nov 09, 2017 1:46 pm
Forum: Dev: Hardware
Topic: 12 channel injector module - VNS14NV04
Replies: 13
Views: 14453

Re: 12 channel injector module - VNS14NV04

I have doubts about the choice of these FETs, the protection circuit cutting in is going to lift the gate voltage, the datasheet states 8V maximum. The drive voltage is labelled at 5V but as far as I can see its a 3V drive direct from the micro through a 20R resistor which gives (8-3)/20 = 250mA. It...
by Rhinoman
Wed Oct 25, 2017 12:19 pm
Forum: Dev: Hardware
Topic: Frankenso - ECU shield compatible with OEM case / official
Replies: 552
Views: 560846

Injector drivers

I'm still working away from home so I can't check this. I'm looking through the frankenso v0.42 schematic again and I can see that the injector drivers are driven by signal named inj_xx_5V. It appears that the signal comes directly from the processor which is 3.3V is it not?
by Rhinoman
Tue Aug 01, 2017 5:05 pm
Forum: Dev: Hardware
Topic: analog inputs: op-amp + divider - Russian - now MCP6004
Replies: 124
Views: 134627

Re: analog inputs: op-amp + divider - Russian - now MCP6004

If its battery voltage then you need to ensure that the input pin voltage will be valid over the range of possible battery voltages. Also if you're not feeding into a schottky input then you will need to meet the minimum rise time requirement.
by Rhinoman
Fri Jun 30, 2017 11:03 am
Forum: Dev: Hardware
Topic: Injection timing using FPGA for Common Rail Diesel
Replies: 9
Views: 8199

Re: Injection timing using FPGA for Common Rail Diesel

You can do that with a general purpose MCU, 1us resolution is easy to achieve with a 32b timer running a 1Mhz. In theory you can go down to 23.8ns on the F405 when you run the timer at it's max frequency of 42Mhz. Yes my 1991 ECU achieves 1us resolution running a 6801 variant with a 1 MHz E clock d...
by Rhinoman
Mon Jun 19, 2017 12:59 pm
Forum: Misc
Topic: FPGA in ECU
Replies: 43
Views: 48736

Re: FPGA in ECU

I have done quite a bit of FPGA work on defence contracts. Its very unlikely you will see one in a production ECU because they are far too expensive, fortunately FPGAs aren't needed for EFI, modern processors are more than fast enough. I prefer VHDL to Verilog; neither VHDL nor Verilog should be con...
by Rhinoman
Mon Jun 19, 2017 12:29 pm
Forum: Dev: Software
Topic: idle IM_AUTO fixes and development.
Replies: 45
Views: 30433

Re: idle IM_AUTO fixes and development.

Which transform are you using to move from continuous time to discrete time?
by Rhinoman
Mon Jun 19, 2017 11:58 am
Forum: You and your build
Topic: 2001 Citroen C5 HPi 2.0 HPI (Direct Injection)
Replies: 17
Views: 17326

Re: 2001 Citroen C5 HPi 2.0 HPI (Direct Injection)

You may find that at low battery voltages additional high voltage pulses are inserted to maintain a constant current; there can be quite complex strategies with HV injectors. Switching the injectors on the high and low side is standard practise for a low-z injector. The upper transistor is switched,...
by Rhinoman
Thu May 11, 2017 3:32 pm
Forum: Dev: Hardware
Topic: CAN bus: RX8 cluster
Replies: 25
Views: 19315

Re: CAN bus: RX8 cluster

can't get it what it means - high impedance, low impedance... but when you look at the transceiver pinout, you'll see that it is powered either from 5V or from 3V, which seemingly implies that this voltage levels could be found on the can bus. How does the transceiver sense the lines? Have you chec...
by Rhinoman
Thu May 11, 2017 3:20 pm
Forum: Dev: Software
Topic: ISO 9141-2 Diagnostics
Replies: 18
Views: 21814

Re: ISO 9141-2 Diagnostics

One interresting thing to support 9141 is that it could act as a "reader" from the stock ECU to "clone" the original ignition and injection maps and use it as a stock tuning base for your car and engine. I think it would be pretty simple to implement eg.: Lets say we switch ruse...
by Rhinoman
Thu May 11, 2017 3:09 pm
Forum: You and your build
Topic: General support questions thread
Replies: 53
Views: 29916

Re: General support questions thread

filip5 wrote:Getting back to nissan. The attached picture show the existing cam disc that produces the 180 ref signal and 1degree accuracy out of 360 and the disk that megasquirt recommend for nissan.
The 360 slots plus four is the same as a Suzuki model, I have one of these in my lab.
by Rhinoman
Fri Apr 28, 2017 8:48 am
Forum: Dev: Software
Topic: BOM online viewer by andreika
Replies: 4
Views: 4359

Re: BOM online viewer by andreika

That is cool.
by Rhinoman
Thu Apr 27, 2017 2:22 pm
Forum: Dev: Hardware
Topic: 3D printing ECU case - cost?
Replies: 72
Views: 72544

Re: 3D printing ECU case - cost?

Black plastic cases usually contain more carbon than other colours and are more effective at screening although you won't get anywhere near the same attenuation as with metal. Most of the ECUs that I deal with have had black plastic cases since around 2001. I would prefer to have an aftermarket ECU ...
by Rhinoman
Tue Apr 25, 2017 8:58 am
Forum: Dev: Software
Topic: ISO 9141-2 Diagnostics
Replies: 18
Views: 21814

Re: ISO 9141-2 Diagnostics

It's not a big problem to implement ISO protokol, But It's Not so Simple like added Two wires in the OBD connector. If you really want implement it, You Can try Google with "Stern iso protocol". There are sources somewhere. There are better circuits on the internet, it looks like the comp...
by Rhinoman
Tue Apr 25, 2017 8:19 am
Forum: Dev: Hardware
Topic: GSM serial data
Replies: 12
Views: 8419

Re: GSM serial data

I used serial mode with a SIM900 module, it can be done with a USB-TTL adapter. I have also used TCP/IP with a 3G module but that was a complete system using Ethernet so it was a 'bolt in'.
by Rhinoman
Tue Apr 25, 2017 8:10 am
Forum: Dev: Hardware
Topic: track telemetry - data radio
Replies: 73
Views: 44130

Re: track telemetry - data radio

russian wrote:
stefanst wrote:Depending on antenna, I'd guess a pair of simple RF transceivers should do:
https://www.sparkfun.com/products/12770
I do not have SPI on my laptop (unless I do)

Any optioons for more $ but with a case and RS232?
FTDI make a USB - SPI converter cable.
by Rhinoman
Tue Apr 25, 2017 8:09 am
Forum: Dev: Hardware
Topic: track telemetry - data radio
Replies: 73
Views: 44130

Re: track telemetry - data radio

I guess all these solutions are dirt cheap on ebay exactly because they are useless. It depends what you want to use them for, those 144-174MHz units could be ideal for me, I have been experimenting with AIS reception using a walkie-talkie module but it doesn't work very well, because I can't turn ...
by Rhinoman
Tue Apr 25, 2017 7:49 am
Forum: Dev: Software
Topic: ISO 9141-2 Diagnostics
Replies: 18
Views: 21814

Re: ISO 9141-2 Diagnostics

I should have said 'live data' not fault codes. I have corrected my post above.
by Rhinoman
Tue Apr 25, 2017 7:42 am
Forum: Dev: Software
Topic: ISO 9141-2 Diagnostics
Replies: 18
Views: 21814

Re: ISO 9141-2 Diagnostics

Why old ISO if there is a faster, simpler and more versatile CAN ? I wanted full plug and play and the stock vehicle wasn't wired for CANBus but had a comprehensive diagnostic capability that used KWP2000. I also wanted it to be compatible with the manufacturer's handheld scan tool and a scangauge ...
by Rhinoman
Mon Apr 24, 2017 8:23 am
Forum: Dev: Hardware
Topic: stm32 LQFP48
Replies: 21
Views: 22105

Re: stm32 LQFP48

Tomin wrote:USB2CAN int. like Lawicel or so uses different command set than ELM.
ELM commands are not protected at all, what I know. No problem to use it.
ELM commands are copyright of ELM.
by Rhinoman
Mon Apr 24, 2017 8:18 am
Forum: Dev: Hardware
Topic: GSM serial data
Replies: 12
Views: 8419

Re: GSM serial data

I've used them, they are fairly straightforward but you need to be somewhere were there is a reliable signal - not in the English countryside!
by Rhinoman
Mon Apr 24, 2017 8:04 am
Forum: Dev: Software
Topic: ISO 9141-2 Diagnostics
Replies: 18
Views: 21814

Re: ISO 9141-2 Diagnostics

I looked at this a while back, OBD2 Mode 1 (live data) is mostly implemented already. It would need a small rewrite to implement two byte PIDs if extended diagnostics were required - the OBD2 specification is rather limited.
by Rhinoman
Fri Apr 21, 2017 12:41 pm
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 161
Views: 322578

Re: Is stm32f4 the right chip?

Is there risk that this will not make it to production? Does this chip offer features that will cause OEM's to use it? They don't make a chip unless there is a market for it, it will have been developed for some OEM purpose with a high enough volume to justify it. Whether it will become available i...
by Rhinoman
Fri Apr 21, 2017 10:57 am
Forum: Dev: Hardware
Topic: Frankenso - ECU shield compatible with OEM case / official
Replies: 552
Views: 560846

Re: Frankenso - ECU shield compatible with OEM case

http://rusefi.com/wiki/index.php?title=Vehicle:Honda_Accord_1995 actually has two signal grounds - one just for MAP, another one for other sensors A23 and A24 are power grounds while A26 is logic ground. Looks like a there of OEM ECUs using at least three different grounds. Why? Externally the wiri...
by Rhinoman
Fri Apr 21, 2017 9:03 am
Forum: You and your build
Topic: Honda CBR 600 RR
Replies: 12
Views: 10884

Re: Honda CBR 600 RR

andreika wrote: I will, eventually!.. Perhaps, in the russian subforum - nobody here is really interested in 40-year retro car, I guess... :?
I am, I'm a big fan of old cars, especially what we call 'old skool'
by Rhinoman
Fri Apr 21, 2017 8:15 am
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 161
Views: 322578

Re: Is stm32f4 the right chip?

Actual chip PS32K144UAT0VLLA I do not see available Oh, this P in the beginning stands for PROTOTYPE. Seems a bit too early to jump on this wagon? That's normal Freescale/NXP practice, they tend to keep the 'P' designation until they are in mass production. If it has had more than one revision its ...
by Rhinoman
Fri Apr 21, 2017 7:59 am
Forum: Dev: Hardware
Topic: analog inputs: op-amp + divider - Russian - now MCP6004
Replies: 124
Views: 134627

Re: analog inputs: op-amp + divider - Russian - now MCP6004

Frankenso does not have any analog outputs. It has several analog inputs, but no outputs. What is an application which would need an analog output? I don't know why you asked this but in the past when I've needed to generate an analogue signal then I've just feed a PWM signal into an integrator. On...
by Rhinoman
Thu Apr 20, 2017 8:01 am
Forum: Dev: Hardware
Topic: Buck Converter: A problem with the output stage of TIP122
Replies: 12
Views: 9674

Re: Buck Converter: A problem with the output stage of TIP12

If you have a uni-directional TVS across the front then D15 isn't required as the TVS will blow the fuse, there isn't any harm in having it there but it will raise the minimum voltage at which the ECU will function. D220 looks like its supposed to be a bi-directional TVS which is pointless, with D15...
by Rhinoman
Wed Apr 19, 2017 12:29 pm
Forum: Dev: Hardware
Topic: Buck Converter: A problem with the output stage of TIP122
Replies: 12
Views: 9674

Re: Buck Converter: A problem with the output stage of TIP12

You don't really need D15, what is the value/part number of D220? I would increase the rating of C16 to 50V, the regulator is 45V silicon and that is the minimum voltage you will need to withstand to meet the lowest load dump pulse rating (clamped alternator). What is D16 supposed to do? if it is me...