Search found 51 matches

by DaWaN
Tue Apr 11, 2017 2:03 pm
Forum: Hardware
Topic: analog inputs: op-amp + divider - Russian - now MCP6004
Replies: 126
Views: 35328

Re: analog inputs: op-amp + divider - Russian - LMV324IDT

I need it for the knock sensor (sampling at 115kHz), but in this case the GBWP is more than sufficient indeed. I agree, we should not care about values near the rails, as the sensors should not go anywhere near that, it should be used to detect open loops. I would not use the same topology for knoc...
by DaWaN
Tue Apr 11, 2017 11:57 am
Forum: Your car & your engine
Topic: '03 Miata with VVT #28
Replies: 82
Views: 8587

Re: '03 Miata with VVT #28

Perhaps something to consider, perhaps dithering the control signal might help. With cold oil you might be faced with some hysteresis. Hysteresis could cause mean that when you command it to go to say 0% to 50%, it only gets to 40%. Or if you go from say 100% to 50% it only gets to 60%. This can ca...
by DaWaN
Tue Apr 11, 2017 11:38 am
Forum: Hardware
Topic: analog inputs: op-amp + divider - Russian - now MCP6004
Replies: 126
Views: 35328

Re: analog inputs: op-amp + divider - Russian - LMV324IDT

The input can go for that range, the issue is the output. That ST chip is much better about actually being a rail to rail chip. Is .2V either rail close enough? See page 6 for VCC = 5V found in aneox's link. Snippet below. ST_LMV324_rail.PNG Using the same opamp on my design, I have the same behavi...
by DaWaN
Tue Feb 28, 2017 10:41 pm
Forum: Hello World
Topic: BMW K1100RS
Replies: 35
Views: 2797

Re: BMW K1100RS

Ah, a BMW K motorcycle! These are quite popular in The Netherlands. Which year is your K (I guess 1992 - 1996 ish?) and where are you from? The BMW K only has a coolant temperature sensor, intake air temperature sensor and a throttle position sensor as you already mention. This way of determining en...
by DaWaN
Wed Jan 11, 2017 1:29 pm
Forum: Your car & your engine
Topic: red 2003 VVT test mule Miata NB2 #27
Replies: 128
Views: 18137

Re: red 2003 VVT test mule Miata #27

Looks like we won't need PID if this is true. If I understand this properly, the VVT works more like a three position switch for an electric motor. Pos 1: move backward Pos 2: stop Pos 3: move forward So all we need to do is figure out the 3 values for the solenoid that shift to these positions and...
by DaWaN
Tue Jan 10, 2017 5:21 pm
Forum: Your car & your engine
Topic: red 2003 VVT test mule Miata NB2 #27
Replies: 128
Views: 18137

Re: red 2003 VVT test mule Miata #27

I think that is expected. The VVT valve bascially has 3 positions: Advance, hold, retard. So you mean miata NB2.5 specifically is not really "variable valve timing" but more like "pretty much three position timing"? No, that is not what I mean. The Miata VVT system is perfectly capable of keeping a...
by DaWaN
Tue Jan 10, 2017 9:16 am
Forum: Your car & your engine
Topic: red 2003 VVT test mule Miata NB2 #27
Replies: 128
Views: 18137

Re: red 2003 VVT test mule Miata #27

Moving the other side of the diode has resolved the issue! Interesting how same exact thing was not a problem on the Dodge. Also played with VVT in open loop a little :) It's pretty ON/OFFish with duty cycle, nothing at 28% and full on at 38% I think that is expected. The VVT valve bascially has 3 ...
by DaWaN
Sat Sep 10, 2016 10:41 am
Forum: Misc
Topic: EUDM miata square top
Replies: 5
Views: 2533

Re: EUDM miata square top

I've honestly tried googing but still a bit confused. Which years of EUDM 1.8 Miatas are the holu grail square top intake manifold? I know in US we have NA8 -4-97 which is one head, NB8 99-00 are the NP4W with VICS and 01+ comes with a different intake I believe. What about EUDM - which years of NB...
by DaWaN
Wed Jun 03, 2015 8:58 pm
Forum: Software
Topic: hip9011 integration
Replies: 115
Views: 17101

Re: hip9011 integration

However, I'm interested to see if we even need to adjust triggering parameters with RPM. The other algorithms I have seen for the TPIC8101 and the HIP9011 use fixed time constants. To see why this is a bad idea, give TPIC/HIP a constant input from a function generator and then vary the RPM (varying...
by DaWaN
Mon Jun 01, 2015 9:58 pm
Forum: Hardware
Topic: universal ECU connector?
Replies: 65
Views: 13897

Re: universal ECU connector?

I never built many wiring harnesses, but what I remember from assembling Molex Mini-Fit and Molex Micro-Fit cables is that crimping usually ends up stronger than the cable itself. So before building a harness I would always test one type of wire together with one contact in the following manner: -Cr...
by DaWaN
Sun May 31, 2015 8:57 pm
Forum: Software
Topic: Frequency-producing MAF support?
Replies: 13
Views: 2592

Re: Frequency-producing MAF support?

It appears the frequency decoder will need to decode between 10Hz and 15kHz to cover a variety of sensors. If we make it accurately capture the 15kHz signal, it should be accurate for the lower frequency signals. Per Nyquist this means we need to capture at least 2X the 15kHz, so the decoder will n...
by DaWaN
Thu May 07, 2015 9:24 pm
Forum: Software
Topic: hip9011 integration
Replies: 115
Views: 17101

Re: hip9011 integration

Separate question: real-life testing. At some point I would probably want to get knock on my test mule Neon (cylinder bore: 87.5mm) so that I can verify that rusEfi in fact detects it. Question: how do I do that? :) Induce knock in a safe way. I did some reading on this some time ago and I think th...
by DaWaN
Thu May 07, 2015 8:35 pm
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 91
Views: 14381

Re: Is stm32f4 the right chip?

I have some experience with FPGA's and writing code for them in VHDL. Ultimately a hardware solution realized in a FPGA is superior to a software/timer solution in a MCU. However: what do we really need? All I can say I have to agree with kb1gtt. The current MCU should be well capable of the timing ...
by DaWaN
Wed Apr 08, 2015 11:30 am
Forum: Hardware
Topic: analog inputs: op-amp + divider - Russian - now MCP6004
Replies: 126
Views: 35328

Re: analog inputs: op-amp + divider - Russian - LMV324IDT

Hmmm, it would appear that this type of rail to rail op-amp can't go to the rails. I see Vicr should limit the top end to between 4 and 4.2. So we are really lucky that it's going to 3.39v. From this datasheet http://www.ti.com/lit/ds/symlink/lmv324.pdf page 6 LMV324_Vicr.JPG The solution for this ...
by DaWaN
Tue Mar 31, 2015 9:23 pm
Forum: Hardware
Topic: hip9011 - crystal issue
Replies: 33
Views: 5054

Re: hip9011 integration

I have also removed the caps all together, which seems to start reliably. I then noticed that we were sending SPI as soon as it was starting, and that even with the XTAL starting reasonably fast, we were seeing the SPI before the XTAL was stable. So I got russian to add a 100mS delay to the SPI. It...
by DaWaN
Tue Mar 31, 2015 9:09 pm
Forum: Hardware
Topic: Atmel SAM V71 Xplained Ultra evaluation board
Replies: 2
Views: 2341

Re: Atmel SAM V71 Xplained Ultra evaluation board

SAM V71 devices are members of a family of Automotive Flash microcontrollers based on the high-performance 32-bit ARM Cortex-M7 processor with Floating Point Unit (FPU). These devices operate at up to 300MHz and feature up to 2048 Kbytes of Flash, up to 384 Kbytes Automotive Grade — AEC-Q100 Grade ...
by DaWaN
Tue Mar 31, 2015 8:24 am
Forum: Hardware
Topic: hip9011 - crystal issue
Replies: 33
Views: 5054

Re: hip9011 integration

I did some more digging as I want to understand crystal oscillators fully. If the load capacitance matches the crystal there are a few options left to make the crystal start quicker: 1. Select crystal with lower Rs 2. Try a higher value for the 1M feedback resistor (try 2M or something) 3. Try lower...
by DaWaN
Tue Feb 24, 2015 8:10 am
Forum: Your car & your engine
Topic: Ford Festiva / Protege / Miata motor (#3)
Replies: 93
Views: 14279

Re: Ford Festiva / Protege / Miata motor (#3)

What intake manifold are you guys running on the BP engine? Your signature says BP-4W cylinder head, so I am assuming you are running a Miata '99-'00 cylinder head and intake manifold. Also running the Miata cams? If so you should see a meaty power band all the way up to 7000 rpm. If you are running...
by DaWaN
Mon Feb 23, 2015 9:44 pm
Forum: Your car & your engine
Topic: Ford Festiva / Protege / Miata motor (#3)
Replies: 93
Views: 14279

Re: Ford Festiva / Protege / Miata motor (#3)

puff wrote:is there a way to compare ignition timing in stock and rusefi setups at full throttle/given rpm?
Yeah, I was thinking alike, it might not hurt to check actual ignition timing with a timing gun to check the actual timing is in line with what you want it to be with rusEFI!
by DaWaN
Sun Feb 22, 2015 9:30 pm
Forum: Your car & your engine
Topic: Ford Festiva / Protege / Miata motor (#3)
Replies: 93
Views: 14279

Re: Ford Festiva / Protege / Miata motor (#3)

russian wrote:blue line is stock ECU, red line is rusEfi

Dyno plot
Nice bit of extra torque, but what is happening after 5500 RPM ? Stock ECU well outperforming rusEFI there..
by DaWaN
Sun Feb 22, 2015 9:28 pm
Forum: Hello World
Topic: Introduction
Replies: 10
Views: 2001

Re: Introduction

Hi Dutchy :) I live in Drenthe so not nearby. Am building this block and have some plans for it, for my 1972 TA12 carina. Why is EFI on ITB more difficult compared to a (plenum) common intake? First want a working EFI, and add edis lateron. I think you should include ignition at the same time, doin...
by DaWaN
Sat Feb 21, 2015 4:03 pm
Forum: Hello World
Topic: Introduction
Replies: 10
Views: 2001

Re: Introduction

No, but will check all details to get a working setup. I only need efi, spark is kept original witwith electronic powered points ignition. So I need a (wideband) o2 sensor, tps, water temp sensor, air temp, timing signal maybe with crank speed, and car speed sensor. I have to drive only 2 paired or...
by DaWaN
Sat Feb 14, 2015 10:15 am
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 91
Views: 14381

Re: Is stm32f4 the right chip?

I spent some time thinking about this and I think this thread is an awesome discussion. I think the biggest hurdle here is to have a configurable engine position input. Determining the engine position is the very heart/core/soul of the ECU and determines its performance. For any OEM this engine posi...
by DaWaN
Sat Feb 07, 2015 8:32 pm
Forum: Misc
Topic: Maybe new rusefi target? TMS570
Replies: 96
Views: 22648

Re: Maybe new rusefi target? TMS570

Going back to the 'free as in beer' - if you need the other type of free environment there are GCC based IDEs and toolchains available too. HalCoGen outputs code for several different toolchains (it's mainly the assembly syntax that is different, and while most of the code is "C" some of the startu...
by DaWaN
Sat Feb 07, 2015 8:18 pm
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 91
Views: 14381

Re: Is stm32f4 the right chip?

I am in sync with Sync on this subject. To me the switch to a different MCU is not very crucial. The lack of a 5V ADC requires a bit of extra hardware and thus board space, but does not seem like a huge problem to me. The price of the STM32 chips is very low and so is the price of general purpose re...
by DaWaN
Fri Jan 16, 2015 10:30 pm
Forum: Hardware
Topic: hip9011 - crystal issue
Replies: 33
Views: 5054

Re: hip9011 integration

Welcome to the world of crystal oscillators, where almost nobody seems to know and/or understand how these things work. Luckily most of the crystal oscillator application have rather mild frequency accuracy requirements, so usually when the thing oscillates it is OK. At my day to day job I need to h...
by DaWaN
Fri Jan 16, 2015 10:08 pm
Forum: Hardware
Topic: LIR2032 vs CR2032
Replies: 6
Views: 2117

Re: LIR2032 vs CR2032

We have the 2032 mount on Frankenso which as far as I understand is set for a non-rechargeable CR2032 battery. http://i.imgur.com/jGu0KZe.png At the moment this is mostly about using real time for data log filename. Couple of questions: What would we need to change in the schematics to use LIR2032 ...
by DaWaN
Tue Jan 13, 2015 8:57 pm
Forum: Software
Topic: stepper motor logic
Replies: 45
Views: 8059

Re: stepper motor logic

What are the pro's? The A4988 is basically a H-bridge, but with some internal logic that implements features including micro stepping, current limiting, overlap prevention, ect. If we direct drive, many features will need to be built and software debugged. If we buy the chip, we can spend the limit...
by DaWaN
Sun Jan 04, 2015 8:49 pm
Forum: Hardware
Topic: rusEFI display
Replies: 36
Views: 6319

Re: rusEFI display

I kinda like the idea, but I am not sure I am fond of the servos. They are not particular fast: Operating speed: 0.1 s/60 degree and probably noisy too. The size seems reasonable, but it would be nice if the dials would be flatter than 30 mm. Now I am not aware of any ubiquitous small steppers, so t...
by DaWaN
Sat Dec 20, 2014 3:07 pm
Forum: Hardware
Topic: Frankenso - ECU shield compatible with OEM case / official
Replies: 520
Views: 113620

Re: Frankenso - ECU shield compatible with OEM case

Re: HIP9011 We do not have a trace or a through hole for HIP9011 CS line. We have our own 5v pull-up probably because we are pulling all SPI lines to +5v I think HIP9011 deserves it's own SPI bus to eliminate conflict with any other SPI device, so we would need to simply pull this pin down so that ...