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06-03-2009, 03:40 PM | #55 | |
Drives: Yaris Join Date: Oct 2008
Location: Michigan
Posts: 199
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Quote:
The accelerator position sensor just has two output voltages. So my guess is the Blitz/sprint controller is just a simple microcontroller with two analog inputs and two analog outputs, or even simply a rom with a table mapping the input to output and the switch changes an address base. There Might be RMS converters too. Takes the voltages in, puts them into an equation and outputs the result on the outputs. Add a couple GPIO for the reverse sensing and mode switching, and something for the display. That said you could use an oscilloscope to see the factory signal as the pedal moves, then come up with a desired signal over the range. Then find a mapping between the two. You could then get an appropriate microcontroller and build your own. Possibly design a analog circuit that will perform exactly one mapping. Or have a rom with a lookup table with the analog inputs addressing it and the value in each address corresponds to the output at that input voltage.(This seem easiest, but someone that programs PIC microcontrollers will probably opt for number 1) Last edited by markitect; 06-03-2009 at 04:10 PM. |
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06-03-2009, 11:40 PM | #56 |
Heart Up! Vitz
Drives: トヨタ Vitz Join Date: Jun 2007
Location: Fremont, CA
Posts: 2,582
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I'm keeping an eye on this one, get some money quickly, we all want to see the results ^_^
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06-04-2009, 11:00 AM | #57 | |
Drives: 2006 Mazda3 Sedan Join Date: Jun 2007
Location: Germantown, MD
Posts: 116
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Quote:
My plan was to hold the table in EEPROM and make it configurable over the serial port.
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06-04-2009, 11:51 AM | #58 | |
toyota
Drives: 2007 Yaris RS Blazed Join Date: Oct 2006
Location: toronto, canada
Posts: 3,637
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Quote:
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06-04-2009, 12:16 PM | #59 | |
ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
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Quote:
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06-04-2009, 12:19 PM | #60 |
toyota
Drives: 2007 Yaris RS Blazed Join Date: Oct 2006
Location: toronto, canada
Posts: 3,637
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i knew i should have stayed on my electronic engineering course..it would have come in handy..damn it.
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06-04-2009, 03:23 PM | #61 |
Drives: Yaris Join Date: Oct 2008
Location: Michigan
Posts: 199
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https://www.silabs.com/products/mcu/...C8051F0xx.aspx
The dev kit is under $100 someone should scope the signal to confirm its really a DC signal though, wish I had some more free time. |
06-05-2009, 06:44 AM | #62 | |
Drives: 2006 Mazda3 Sedan Join Date: Jun 2007
Location: Germantown, MD
Posts: 116
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I know that on my Mazda I was able to pull APS voltage from the OBD-II PIDS, and it was a 0-5V DC signal. I'll see if I can hook my laptop up to the Yaris this weekend and confirm that it works that same. By the way, you really don't need a whole engine to test this, just the accelerator pedal.
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06-05-2009, 08:22 AM | #63 | |
ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
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Quote:
The only bad thing about that 8051 based mcu is the amount of support circuitry required. The PICs require far less. The reason I would like to have a running engine to bench test with, is that I see taking this to the extreme of actually using the microcontroller to even fire the injectors. The injectors are controlled by a PWM signal. For Turbo and SC cars the system could then meter more fuel as required (by tweaking the PWM duty cycle). |
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07-15-2009, 04:09 AM | #64 |
Banned
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Bump! Sounds hoaxy so what happened?
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07-15-2009, 11:49 AM | #65 |
Drives: 2008 Blazing Blue 3dr LB MT Join Date: Nov 2008
Location: NSB,FL
Posts: 198
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I think he gained so much power from the chipping that he broke the space time continuum, never to be seen again.
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Sometimes you have to spit on your hands, raise the black flag, and start slashing throats |
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