Subject	Getting closer to finishing the MAF signal converter.
Posted by	DVDBURN (MD) on August 12, 2012 at 10:12 PM
	This message has been viewed 883 times.
Message	I'm just waiting on the aluminum enclosures. They are very small compared to what was seen in my post about the prototype. The total size of the unit will be around 1" thick, 3" wide and 4" long. I'll be using a mini version of the Arduino called the Arduino Nano and the LCD display which you see here. There is one button which rotates through the different modes of operation. And on that, I want to say thanks to everyone's ideas on what functions you would like to see it have. Here are some pictures of the display and the functions. I'm still open to ideas so please let me know what you may think regarding any of this. When it's first used the default mode is "Add". It will always start with "Add" untill you select a different mode. The microcontroller has 512 bytes of programmable ROM and the selection is stored in ROM and read from it every time it's started up. Here is a description of the display as seen in the first picture: LCD line one. M1 = MAF 1 input (The voltage is to the right of it.) M2 = MAF 2 input (The voltage is to the right of it.) LCD line two. MAF (The MAF voltage output to the ECU.) Add (the mode) = 1.06 (the combined voltage output of M1 and M2) Mode 1: Add (The added voltage output of MAF 1 and MAF 2) Mode 2: Ave (The average voltage output of MAF 1 and MAF 2.) Mode 3: One (Only MAF 1 ouput if currently using a single MAF.) Mode 4: Two (Only MAF 2 ouput if currently using a single MAF.) Mode 5: EM1 (Emergency mode 1. Only MAF 1 ouput with its voltage doubled in case MAF 2 fails.) Mode 6: EM2 (Emergency mode 2. Only MAF 2 ouput with its voltage doubled in case MAF 1 fails.) Mode 7: EM3 (Emergency mode 3.) In this mode there is a constant 1.60 volt output in case all connected MAFs fail. I'm a little unsure on this voltage. It's a little higher than what you would see at idle but it should be enough to get you home slowly. Or maybe I need to increase it a little? Another thing I want to mention is that this microcontroller can perform an update 10,000 times per second so it's VERY fast. www.mytwinturbo.com Nissan Data Voice - The first Nissan diagnostic software with a voice! Nissan Data Voice on YouTube Download my Nissan 300ZX Vin/Model Lookup. Watch an ECZA meet caravan!
Follow Ups	Getting closer to finishing the MAF signal converter. - DVDBURN (MD) 22:12:43 08/12/12 how about a trim to adjust for different size MAF tubes - FuerGrissa 22:27:05 08/12/12 Sort of related... - DVDBURN (MD) 19:59:15 08/13/12 Arduinos are fun. I wrote a lib to interface with ODB port - Crim 22:30:10 08/12/12 That's neat and thanks for the link. - DVDBURN (MD) 23:14:14 08/12/12 Hmm not handy... - Crim 23:53:30 08/12/12 Nice - thanks for the link. (n/m) - spicyZ 09:20:53 08/13/12 I'm thinking about using one to make a neat little interface - BigTDogg (MA) 09:56:43 08/13/12 drop me a note (n/m) - spicyZ 08:15:54 08/14/12 Cool! (n/m) - BoneZ (MD) 22:32:58 08/12/12 Re: Getting closer to finishing the MAF signal converter. - smartone 22:45:42 08/12/12 nice! - aliaZ 23:30:10 08/12/12 cool my safc did that like a billion years ago... - Dane (Houston) 23:34:59 08/12/12 Ur a great addition to this community. Great job (n/m) - LivinTheDream 00:38:36 08/13/12 Was just about to email you to check for an update. - treese88 08:37:59 08/13/12 Maybe I'm not remembering correctly but with my apexi neo - Evan_Wright (Ca) 10:50:08 08/13/12 You are correct, but DVDBURN has taken that into account. (n/m) - Antihero 15:38:36 08/13/12 Doesn't appear so in the screen shots he posted but cool if - Evan_Wright (Ca) 16:14:00 08/13/12 good point.. - Antihero 17:48:00 08/13/12 Re: good point.. - Antihero 19:58:34 08/13/12 Averaging is correct. - DVDBURN (MD) 19:57:08 08/13/12 averaging is certainly not correct. (n/m) - Antihero 20:00:12 08/13/12 eh...not so sure about that - aliaZ 06:44:54 08/14/12 VG map? And why wouldn't it be a simple average? (n/m) - BigTDogg (MA) 08:31:26 08/14/12 the relationship of MAF voltage and flow are not linear - aliaZ 08:40:37 08/14/12 Right, but if you read... oh NM, just did it in my head - BigTDogg (MA) 08:52:24 08/14/12 Thanks for your help and the email. - DVDBURN (MD) 11:53:24 08/14/12 same sort of deal for ADD - aliaZ 12:28:29 08/14/12 Will I need to wrap my HID's in aluminium foil? (n/m) - fuzzymonkey 11:44:36 08/13/12 Hopefully not. - DVDBURN (MD) 20:25:23 08/13/12 Airflow to voltage isn't a linear relationship. - Jehannum 19:34:18 08/13/12 I have always wanted one that has the ability - Spectrum (WI) 23:14:09 08/13/12 why not just use a blow through MAF after the BOV? (n/m) - aliaZ 13:04:05 08/14/12
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