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Old 04-15-2011, 09:41 AM   #261 (permalink)
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I've often wondered this. Most references I see, say that tach speed in a diesel is taken off the alternator. However, I have an Isuzu pickup diesel with no tachometer.

When I took it to a vehicle check station the mechanic hooked a device that looked like an induction coil over one of the injectors to get his tachometer reading.

Would that be possible on your Suzuki? I assume the system would need independent injectors, and some kind of signal amplifier for the induction method.

Any further ideas?

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Old 04-15-2011, 09:49 AM   #262 (permalink)
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My car has a tachometer installed. So, I think I can use the data from that.
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Old 04-16-2011, 05:00 PM   #263 (permalink)
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I promised myself I'd get an MPGuino when my "money saved" value got over the cost of one. I just ordered one in under 2 months of starting on here.

Thanks to everyone who has contributed and is still going.
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Old 04-16-2011, 06:45 PM   #264 (permalink)
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I checked the wiki and it looks like the newest software is "03/19/2009 updates for v0.80"

Is this right? No software updates since march of 09?
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Old 04-16-2011, 06:56 PM   #265 (permalink)
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last major release was .86 w/metric in april 2010. Only the .cpp file is maintained on googlecode these days.

MPGuino release one workspace - Page 91 - Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com

http://opengauge.googlecode.com/svn/...no/mpguino.cpp
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Old 04-17-2011, 02:53 PM   #266 (permalink)
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i found on that thread that there have been some hardware changes.
hardware:
1. upgraded to atmega328.
2. switched to npn backlight driver, driven from vehicle voltage through a 1 watt resistor rather than regulator.
a. this allows the large capacitor to power the cpu longer in a power dip, since it doesn't try to power the backlight,
and the unit should survive power fluxuations better.
b. takes load off of regulator (the resistor does get warm).
c. makes it easier to relocate that source of heat and/or make it much easier to tie into existing dashboard dimmer circuit.
3. tied in the analog vss and vcc to facilitate analog inputs.
4. added pads for all unused pins (except reset), now experimetors can easily get to rx, tx, aref, 2 analogs and 2 pwm pins.
5. Turned down brownout detecton (we are not writing except at config)
6. Disabled self programming for stability.

All of these hardware changes are on the new "preassembled units" right?

I might be the only one, but i was confused if these hardware changes were just on the "mpguino kit", or on the "preassembled units". Also, i think i'm correct that you aren't affiliated with the person selling the kits, just with amy, and the preassembled units right?
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Old 04-26-2011, 10:48 PM   #267 (permalink)
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is amy still shipping these?
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Old 04-27-2011, 06:54 AM   #268 (permalink)
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Yup, a little slowly perhaps, but she is a busy lady these days.
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Old 05-05-2011, 05:46 PM   #269 (permalink)
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Got mine today! Now to get a project box and hook this sucker up. Thanks guys!!!
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Old 05-05-2011, 07:56 PM   #270 (permalink)
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just made my donation. Finally bit the bullet gonna get one of these things going.

are there directions in this thread for linking this with a geo metro? (94 Xfi) or a specific thread for doing so?

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