Search found 387 matches

by abecedarian
Thu Apr 07, 2016 6:35 pm
Forum: Hardware
Topic: Another ECU...
Replies: 69
Views: 8155

Re: Another ECU...

Not to knock anyone here, but I think a good, hard look at the datasheet for the MAX992x chips as well as a deep study of the evaluations kits might be in order.
by abecedarian
Fri Jan 01, 2016 5:47 am
Forum: Misc
Topic: Happy Holidays!
Replies: 7
Views: 1615

Re: Happy Holidays!

At the risk of sounding redundant...

Hope everyone's had a great year and is ready to take on the next.
by abecedarian
Thu Nov 19, 2015 6:44 am
Forum: Your car & your engine
Topic: VW 1980 aircooled Vanagon
Replies: 21
Views: 3251

Re: VW 1980 aircooled Vanagon

Oops, my web page doesn't link to the real data, it's just vague pretty pictures. This link has more information about those pictures. http://openservo.com/forums/viewtopic.php?t=940 Some comments, these chips need the magnetic flux to be between a reasonably small windows of tesla's. The examples ...
by abecedarian
Wed Nov 18, 2015 9:42 pm
Forum: Your car & your engine
Topic: VW 1980 aircooled Vanagon
Replies: 21
Views: 3251

Re: VW 1980 aircooled Vanagon

... If its event driven it seems feasible to use my sensor approach, using a low level high priority interrupt every us or maybe less often, and setting the "teeth" interrupt flags from it. Instead of using edge triggered inputs. But that depends upon how the other analog inputs are used and how in...
by abecedarian
Wed Nov 18, 2015 12:22 pm
Forum: Your car & your engine
Topic: VW 1980 aircooled Vanagon
Replies: 21
Views: 3251

Re: VW 1980 aircooled Vanagon

I'm familiar with AMS chips http://jaredharvey.com/Files/projects/open-encoder/index.htm Of course their hall sensors can be mounted near your flywheel teeth to get crank info, and you could add one to the cam to get your TDC information. Apparently you're not familiar with the chips I posted. The ...
by abecedarian
Wed Nov 18, 2015 9:31 am
Forum: Your car & your engine
Topic: VW 1980 aircooled Vanagon
Replies: 21
Views: 3251

Re: VW 1980 aircooled Vanagon

I wonder if a software timer could be set to repetitively trigger, then grab the value and stick it in the crank angle variable. Getting the analog value into the code such that other stuff can do it's thing would be the trick. This would be a significant re-design of a crank decoder. You didn't re...
by abecedarian
Wed Nov 18, 2015 12:34 am
Forum: Your car & your engine
Topic: VW 1980 aircooled Vanagon
Replies: 21
Views: 3251

Re: VW 1980 aircooled Vanagon

AMS has several magnetic position sensors that provide various outputs like SPI angle reporting, quadrature ABI, analog voltage and PWM signals. One of their quadrature might be made compatible with rusefi as they output some number of pulses per revolution per channel (A + B). Some of those can be...
by abecedarian
Sat Nov 07, 2015 3:58 pm
Forum: Hardware
Topic: minEFI
Replies: 26
Views: 4920

Re: minEFI

Thats true. And main advantage of this chip is that You have all in one together with fault protection and diagnostics. ... If you choose to use them. MC33812 is protected as well, despite its cylinder restrictions, which result in requiring batch fired injection and wasted spark ignition. However,...
by abecedarian
Fri Nov 06, 2015 6:26 pm
Forum: Hardware
Topic: minEFI
Replies: 26
Views: 4920

Re: minEFI

I believe part of the effort is to make this easily obtained in the remote foot hills of Russia. These specialty chips are not common there. The MC33812 includes 4 channels of injection, as well as 4 channels of IGBT drivers, all in one chip. http://www.freescale.com/files/analog/doc/data_sheet/MC3...
by abecedarian
Tue Sep 22, 2015 6:14 pm
Forum: Your car & your engine
Topic: 2003 Dodge Neon (#9)
Replies: 108
Views: 26569

Re: 2003 Dodge Neon (#9)

http://i.imgur.com/qmJv2cQ.png this signal is supposed to be 50% duty cycle with all tooth the same width, but that's the tragedy of VR type of sensor: only the rises are reliable, the falls are pretty much useless for precise angle measurement. That's going to depend mostly on the correlation betw...
by abecedarian
Mon Sep 14, 2015 4:54 pm
Forum: Hardware
Topic: cheap cylinder pressure sensor option?
Replies: 41
Views: 5629

Re: cheap cylinder pressure sensor option?

One thought might be to open up the spark plug boss and fabricate an insert that could thread in which would supply a "tap" out to the pressure sensor while retaining the spark plug. Depending on the spark plug design- insulator length and such, might even be able to drill and tap the spark plug its...
by abecedarian
Sat Sep 12, 2015 2:38 pm
Forum: Hardware
Topic: Wideband oxygen sensor module
Replies: 14
Views: 9575

Re: Wideband oxygen sensor module

by abecedarian
Sat Aug 29, 2015 8:40 pm
Forum: Misc
Topic: Long range wireless
Replies: 3
Views: 958

Re: Long range wireless

You need constructive criticism to point out flawed logic and suggestions? Okay. BT operates around 2.4GHz; this module is dual band / MIMO at 433/868MHz, so no compatibility there. You would need one of these on the ECU, and another somewhere else that could talk to your cell phone or laptop or wha...
by abecedarian
Wed Aug 26, 2015 10:20 pm
Forum: Misc
Topic: Long range wireless
Replies: 3
Views: 958

Re: Long range wireless

But not Bluetooth.
by abecedarian
Fri Jul 31, 2015 5:02 pm
Forum: Hardware
Topic: minEFI
Replies: 26
Views: 4920

Re: minEFI

Maybe that's "my" issue: I'm not using Kicad. It's still too f'd up to make sense, as in why run 3-4 different programs just to get something going.

Anyhow, I can name all my ground nets "GND" and only get air wires shown to connect them.
by abecedarian
Thu Jul 30, 2015 11:13 pm
Forum: Hardware
Topic: minEFI
Replies: 26
Views: 4920

Re: minEFI

Also a good idea to not have digital GND and analog GND. You should separate your GND's by controlling the current loops that the traces make not by physical barriers in your GND planes. See this article for some extra details on some basic routing guide lines and gut feel data points. http://www.m...
by abecedarian
Thu Jul 30, 2015 1:36 am
Forum: Hardware
Topic: minEFI
Replies: 26
Views: 4920

Re: minEFI

kb1gtt wrote:Yes, and it's good practice to flood all extra area with GND copper.
Also, usually a good idea to keep digital grounds separated from analog grounds, and both separated from power supply grounds... but tie them all together in one place.
by abecedarian
Thu Jul 09, 2015 3:59 pm
Forum: Your car & your engine
Topic: 81 Yamaha XV920, where to start?
Replies: 26
Views: 4520

Re: 81 Yamaha XV920, where to start?

TCI module has 10 connections to it: front cylinder pulser = 2 wires; rear cylinder pulser = 2 wires; front coil = 2 wires; rear coil = 2 wires; power = 2 wires- +12V & chassis ground. Coils are inductive-type and have their (+) terminal supplied 12v via the ignition switch, so tach is supplied via ...
by abecedarian
Mon Jul 06, 2015 8:56 pm
Forum: Your car & your engine
Topic: 81 Yamaha XV920, where to start?
Replies: 26
Views: 4520

Re: 81 Yamaha XV920, where to start?

To start... I'm neither evil or hard to get information from. I'm a pragmatist with a twisted funny bone. ;) I could go into a long diatribe discussing how some bikes used high and low speed ignition windings on the stator and two other windings to generate CDI signals, relying on the phasing betwee...
by abecedarian
Sun Jul 05, 2015 11:54 pm
Forum: Your car & your engine
Topic: 81 Yamaha XV920, where to start?
Replies: 26
Views: 4520

Re: 81 Yamaha XV920, where to start?

just a small update, this is what triggers the pick-up coils, i don't know if there is more then one of them and if these are magnetic or just metal strips, waiting for an answer on that one :) It's just a metal strip and you have only one on the flywheel. I'd explain how the TCI works, but it'll b...
by abecedarian
Sun Jul 05, 2015 11:42 pm
Forum: Your car & your engine
Topic: 81 Yamaha XV920, where to start?
Replies: 26
Views: 4520

Re: 81 Yamaha XV920, where to start?

... abecedarian, i think so too, it doesn't look like anyone else has done this type of a project with this efi/bike combo :) Well, I've a few things I could have / should have said, but it's always fun looking at car guys trying to figure out motorcycles, which they rarely can do. The biggest diff...
by abecedarian
Sun Jul 05, 2015 2:09 am
Forum: Your car & your engine
Topic: 81 Yamaha XV920, where to start?
Replies: 26
Views: 4520

Re: 81 Yamaha XV920, where to start?

This ought to be interesting....
by abecedarian
Mon Jun 15, 2015 9:46 pm
Forum: Your car & your engine
Topic: 1996 Dodge RAM 1500 V8 (#15)
Replies: 94
Views: 17362

Re: 1996 Dodge RAM 1500 V8 (#15)

O2 with bolts. That's got to be really nice. Mine is more standard. I think every Toyota 22RE ever made is like that, as were most 22R after 1985. Most have one ahead of the converter, many have another after the converter installed just the same. So my apologies if millions of vehicles on the road...
by abecedarian
Mon Jun 15, 2015 3:46 pm
Forum: Your car & your engine
Topic: 1996 Dodge RAM 1500 V8 (#15)
Replies: 94
Views: 17362

Re: 1996 Dodge RAM 1500 V8 (#15)

I'm also guessing you haven't changed a modern wheel bearing. Those generally require a large force, which often breaks things. Some times things simply rust weld to the point where you can't save them. I'm also guessing you haven't changed the tire on a semi, backhoe or front loader. Forget 1/2" d...
by abecedarian
Sun Jun 14, 2015 8:27 pm
Forum: Your car & your engine
Topic: 1996 Dodge RAM 1500 V8 (#15)
Replies: 94
Views: 17362

Re: 1996 Dodge RAM 1500 V8 (#15)

In 30 years of working on my on vehicles, and about 10 years working on tractors and similar, not once have I ever broken a tool.

I guess you just have to be smarter than the parts you're working on.
by abecedarian
Sun Jun 14, 2015 1:28 am
Forum: Misc
Topic: New TI Hercules LaunchPads coming soon.
Replies: 9
Views: 2221

Re: New TI Hercules LaunchPads coming soon.

330MHz 4MB Flash with ECC 512KB RAM with ECC This stuff is really good, I wish I had the time :( I wish anybody had time & skills to move this forward! No one already invested is willing to abandon that, and I can't blame them. In a similar vein, you are already over-taxed by the burden of rusefi, ...
by abecedarian
Fri Jun 12, 2015 4:23 am
Forum: Misc
Topic: New TI Hercules LaunchPads coming soon.
Replies: 9
Views: 2221

Re: New TI Hercules LaunchPads coming soon.

Officially announced:
http://www.ti.com/ww/en/launchpad/launc ... 0LC43.html <- automotive qualified processor
http://www.ti.com/ww/en/launchpad/launc ... rm57L.html <- medical / industrial qualified processor

$29.99 USD
by abecedarian
Thu Jun 04, 2015 1:19 am
Forum: Misc
Topic: Tuning table wish list item ;)
Replies: 1
Views: 726

Re: Tuning table wish list item ;)

30x30 tables? :o
by abecedarian
Mon Jun 01, 2015 5:50 am
Forum: Misc
Topic: New TI Hercules LaunchPads coming soon.
Replies: 9
Views: 2221

Re: New TI Hercules LaunchPads coming soon.

BGA on the left? Yep. On the right is the LaunchPad based on LS1224. It is a little curious that the BGA chip doesn't have all the capacitors and such crowding it like the other has, right? BTW- there are no components on the bottom of the board; just some silk screen about the BoosterPack header p...
by abecedarian
Sun May 31, 2015 11:21 pm
Forum: Misc
Topic: New TI Hercules LaunchPads coming soon.
Replies: 9
Views: 2221

Re: New TI Hercules LaunchPads coming soon.

IMG_20150531_102949122.jpg
IMG_20150531_102949122.jpg (560.67 KiB) Viewed 2128 times
LC4357 <-> LS1224
LaunchPads