"NEW STUFF" To Come....

[Redmeanie]

Just to give you guys heads up....

I just finished a PCB for a "Fuel Mixture Display" that should make a perfect addition to the Mixture Controller. Ran on a DPDT switch you would be able to see what the O2 Sensor is Reading, and what your ECU thinks it's reading.
As soon as I build one and Confirm proper Function I will make it available.

Also I am working on a PWM circuit that is "Current" Limiting. This will allow you to pretty much NEVER have to worry about heat, Runaway or over current situations AGAIN! There are some out there but the are not reliable, or capable of Fully Driving a MOSFET. I have looked over a few of the Circuits and think "I MAY" know why. So as soon as I can build this and Confirm, it shall also be made available here...

[TuxAir]

too damn cool RedMeanie!

[ashtweth]

Nice man!

[ANTIQUER]

Just to give you guys heads up....

I just finished a PCB for a "Fuel Mixture Display" that should make a perfect addition to the Mixture Controller. Ran on a DPDT switch you would be able to see what the O2 Sensor is Reading, and what your ECU thinks it's reading.
As soon as I build one and Confirm proper Function I will make it available.

Also I am working on a PWM circuit that is "Current" Limiting. This will allow you to pretty much NEVER have to worry about heat, Runaway or over current situations AGAIN! There are some out there but the are not reliable, or capable of Fully Driving a MOSFET. I have looked over a few of the Circuits and think "I MAY" know why. So as soon as I can build this and Confirm, it shall also be made available here...

Ditto on Ashweth's & Tuxair's comments. You the man!
Al.

[WCastle]

There was a current limiting circuit at a printed circuit company I used to work at, it consisted of a carbon pile resistor that the current for the gold electroplating tub went through, the voltage at each end of the pile was sampled and fed to an instrumentation amplifier, pretty much a differential amp.

The output was inverted and used to feed the parallel bank of bipolar driver transistors.

looking back it is kind of funny that what they did is like an op-amp
all of those discreet components matched hfe transistors, precision components, all could be done with a 741 !,

Just thought I would mention it as the method may be useful in your "NEW STUFF"

[Jetijs]

A little off topic question.
Does anybody know how the car computer deals with the fuel consumption data? I mean it can show the actual fuel consumption and it can show the average reading, but how big is the period that the computer takes into account? Does it take the average of ALL the data it has, starting from the point when it was manually reset, or does it take the data from a certain period (a week for example) and discards any previous data?

[WCastle]

Here are a couple of links that have useful info for OBD and OBD2...


On-board diagnostics - Wikipedia, the free encyclopedia

On-Board Diagnostics (OBD) | US EPA

[Banshee]

Just to give you guys heads up....

I just finished a PCB for a "Fuel Mixture Display" that should make a perfect addition to the Mixture Controller. Ran on a DPDT switch you would be able to see what the O2 Sensor is Reading, and what your ECU thinks it's reading.
As soon as I build one and Confirm proper Function I will make it available.

Also I am working on a PWM circuit that is "Current" Limiting. This will allow you to pretty much NEVER have to worry about heat, Runaway or over current situations AGAIN! There are some out there but the are not reliable, or capable of Fully Driving a MOSFET. I have looked over a few of the Circuits and think "I MAY" know why. So as soon as I can build this and Confirm, it shall also be made available here...

Way to go, this is one of the things I have been worried about!

Man, when you get this squared away, let me know. I would be interested in getting one of the PWM and EFIE kits from you to use on my first Booster system....

Nice Job!


Banshee

[jstadwater]

Thanks Redmeanie,

You ARE the MAN!!! I too will be appreciative of having access to those items. Great work!!

[deggers]

pmw with constant current

How's your constant current limiting circuit coming along? I'd like to help if I could. I was trying to find some of the existing circuits out there, do you have some links?

I was thinking that a shunt resistor or a fuse could be used to feed sense voltage to an op-amp, then to the pwm and mosfet driver.

I'm just pulling these thoughts out of my head, so they may be impractical.

Duane

[TuxAir]

I've been looking/reading up on this subject too. Zero Fossil Fuel (the you tube guy) has a schematic for a Constant Current PWM that may interest you. I myself am waiting to see what Red's idea is.

Kind regards!

[deggers]

Thanks Tux,

That circuit looks pretty good, however, I think it may fall under Red’s "Not capable of fully driving a mosfet" category.

I’m no EE, but I don’t think that an op amp is the proper thing to drive a mosfet.

I really like Bob Boyce’s approach which uses a mosfet driver.

http://focus.ti.com/lit/ds/symlink/ucc27321.pdf

Hopefully Red or someone else can fine tune some of the designs out there to make a better solution.

Duane

[RevNelson]

Found a link to Zero Fossil Fuel's scheme for a PWM that is Current Controlled

Zero Fossil Fuel Constant Current PWM v2

[Redmeanie]

Hi All!
Sorry it took awhile to answer....Just this time of year wreaks havoc on my body!
I have completed the build and tested my design...So far it has been running 24 hrs a day with a 20AMP constant load for 4 days straight with NO problems. The zero Fossil fuel circuit is a circuit that has been around ALONG time. It is used in certain industries and in many devices and equipment that need constant current limitations. The problem with this circuit as shown is not "completely" ready to do this on it's own, reliably. I have been working on this for awhile now and added a few things. So in about 6 days I will be offering Assembled units. To build and "tune" this circuit reliably, A kit will not be offered. So anyone who needs one, or would like to have one, keep an eye out. As a matter of fact in a couple of days I will not be supplying any more kits. Just to much of a headache.