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Old 05-01-2010, 08:56 AM   #911 (permalink)
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well, it is possible, in the sense that anything is possible. But you would really have to know what you are doing to do that, take some rewiring and recoding and yadda.

P.S. prebuilt is a 16X2

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Old 05-07-2010, 04:04 PM   #912 (permalink)
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Hi there!
This is my first post here.
I have a question. If board is connected to +12v and gnd, that means it is ON all the time?
awesome project
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Old 05-08-2010, 01:11 AM   #913 (permalink)
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Yes, it has power and is powered up all the time. That said, if nothing happens for a preset amount of time, the backlight goes out and I think the current info blanks. I've had mine plugged in for over a month now, and have not had a problem.
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Old 05-08-2010, 11:09 AM   #914 (permalink)
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i am waiting for my lcd. ordered from ebay, because local shop didnt have orange screens. cant wait to put it in my car
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Old 05-15-2010, 11:00 AM   #915 (permalink)
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somethin strange is happening with my arduino.
i calibrated vss pulses, so no problem there
connected injector and at start it worked fine, but now i cannot calibrate it. today it showed almost the same numbers as my stock instant consumption gauge in car. problem is the readings are ''jumping'' around. it shows ~7 l/100km then jumps to 32 l/100km for a second and returns to ~7 and that happens without touching accelerator pedal.. then again without changing anything mpguino shows instant consumption around ~250 l/100km under same conditions.

also, how to delete mpguino memory. even if i upload program ''Blink" from examples and then again mpguino code, setings stay the same.

thanks!
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Old 05-21-2010, 09:57 AM   #916 (permalink)
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Maybe someone may sent me compiled mpguino file to andrius.dirda{eta}gmail.com i wont to write it with my programmer. I need fuse bits to, thanks
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Old 06-06-2010, 01:40 AM   #917 (permalink)
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I noticed a 'sleep' function in the Atmega328 data sheet. Is this being used in the MPGuino at all? My C programming skills are pretty rusty, but I looked through the latest source code on the google group and couldn't find any sleep function.

I wonder, and I didn't get it from the data sheet, if the memory remains intact while in sleep mode. If so, could this be a way to reduce the power consumption to very small levels? That way there would be no concern about leaving the MPGuino on while the car is parked for extended periods of time.

A thought...
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Old 06-06-2010, 02:47 AM   #918 (permalink)
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problem is that it still needs to be listening to the buttons and the injector and the speed signal so it knows when to wake up, which limit the sleep level you can achieve, and might get some strange readings if the program proper isn't running but interrupts are being generated. We are talking 20ma idle current, vs complications (and code space) to remove some fraction of that 20ma, not sure it is worth it to do it correctly (i.e. test the crap out of it and make sure it doesn't break, or break anything else now or in any future updates). It is hard to justify spending the resources on 20milliamps.
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Old 06-06-2010, 10:39 AM   #919 (permalink)
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In fact it's pretty easy to use the sleep mode, you can sleep and being wake up by an external interrupt or pin change, even in the maximum sleep mode.
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Old 06-06-2010, 10:59 AM   #920 (permalink)
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but if you are trying to monitor microsecond level events, you might need to be awake

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