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skewbe diy mpg gauge 07-08-2007, 08:16 AM

MnFocus Came across a link ... 07-08-2007, 09:06 AM

skewbe Yah, that would be an obd... 07-08-2007, 09:32 AM

MnFocus Didn't SVOboy(I think it was... 07-08-2007, 09:43 AM

landspeed The cheapest way to do it... 07-08-2007, 11:22 AM

thisisntjared so how much do you think that... 07-08-2007, 05:43 PM

landspeed No idea, but, I know I could... 07-09-2007, 03:21 AM

sonyhome Looking at the Mnfocus linky,... 07-08-2007, 09:17 PM

skewbe Yah, the laptop->obd route is... 07-08-2007, 10:24 PM

landspeed I've thought of this and... 07-09-2007, 03:25 AM

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skewbe Yah, worth mentioning, don't... 07-09-2007, 05:07 AM

sonyhome Most people have laptops... 07-09-2007, 12:13 AM

skewbe Yah, it isn't that simple. ... 07-09-2007, 05:29 AM

jwxr7 I was just talking with the... 07-09-2007, 07:35 AM

skewbe a vss is easy to fabricate if... 07-09-2007, 08:10 AM

VXrunner I'd love to see what you come... 07-10-2007, 12:13 PM

sonyhome Let's recap, assuming you... 07-10-2007, 12:37 PM

skewbe that is incorrect, not all... 07-10-2007, 01:36 PM

Bill in Houston In a way, you're making it... 07-10-2007, 01:03 PM

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skewbe revisiting the analog stuff 07-10-2007, 07:38 PM

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skewbe more analog 07-10-2007, 09:04 PM

skewbe status 07-15-2007, 01:27 PM

thisisntjared i agree, as long as it is... 07-15-2007, 03:04 PM

MetroMPG Forgive my ignorance, but... 07-15-2007, 06:02 PM

skewbe A more hardcore embedded... 07-15-2007, 06:27 PM

skewbe Ooh yah, and a with a well... 07-15-2007, 06:50 PM

sonyhome LOL! So back to an OBD... 07-15-2007, 09:51 PM

skewbe I'm NOT currently planning on... 07-16-2007, 02:08 AM

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skewbe 1998 geo metro TBI injector... 07-20-2007, 11:28 PM

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skewbe Here's the actual recording 07-21-2007, 04:59 AM

sonyhome Pretty cool ... but I don't... 07-21-2007, 12:12 PM

skewbe the diodes are supposed to... 07-22-2007, 07:26 AM

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skewbe We have gui 07-22-2007, 12:40 AM

jtiner I am new to this forum and I... 07-23-2008, 09:22 PM

sonyhome [QUOTE=jtiner;112351] 1.... 07-23-2008, 10:15 PM

jtiner Thanks for the advise. Are... 07-24-2008, 08:37 AM

thisisntjared thanks for the open source... 07-22-2007, 01:55 PM

MetroMPG I am duly, duly impressed! ... 07-22-2007, 05:37 PM

skewbe MPG cruise control 07-23-2007, 05:29 PM

MetroMPG Inspired. Creativity is cool. 07-23-2007, 05:40 PM

skewbe Heh, a couple more goodies... 07-23-2007, 07:59 PM

MetroMPG Ooo! I like the audio signal... 07-24-2007, 05:04 AM

psyshack Boy there are some smart... 07-24-2007, 05:18 AM

skewbe Actually, I was thinking of a... 07-24-2007, 10:05 AM

cfg83 skewbe - Ha ha! I was... 07-24-2007, 11:06 AM

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skewbe I got a request to provide a... 07-24-2007, 07:01 PM

philmcneal the power of open source, now... 07-24-2007, 10:06 PM

skewbe Not obd, not for newbies, not... 07-25-2007, 04:05 AM

sonyhome Hypermiling User Interface... 07-25-2007, 04:22 PM

sonyhome OK a few other things: -... 07-25-2007, 04:26 PM

skewbe re buckets: Sure, you can do... 07-25-2007, 05:12 PM

sonyhome Agreed :) I was just... 07-25-2007, 05:15 PM

sonyhome Looking at your "diode clamp"... 07-25-2007, 05:35 PM

mpmetro could you take a picture of... 07-26-2007, 10:52 AM

txe5502 Is there any way to use this... 07-26-2007, 06:07 PM

skewbe Are you sure it is only mono?... 07-26-2007, 06:24 PM

itjstagame This is really awesome,... 07-28-2007, 07:18 AM

itjstagame Actually thinking a bit more... 07-28-2007, 07:33 AM

sonyhome Now that you mention it, you... 07-28-2007, 10:43 AM

skewbe sonyhome, maybe a smaller... 07-28-2007, 07:06 PM

itjstagame Ah, very good point. Yeah,... 07-29-2007, 06:10 AM

itjstagame Actually I guess the only... 07-29-2007, 10:44 AM

caprice I'm lost here, but excited... 08-04-2007, 03:10 AM

skewbe There's a couple ways to... 08-04-2007, 06:29 AM

GasSavers_Doc Oxy sensor reading 09-12-2007, 04:51 AM

mpmetro Here are some pics of my... 08-04-2007, 06:48 AM

cfg83 mpmetro - Plastic box... 08-04-2007, 09:57 PM

itjstagame Ok, that's what I understood... 08-06-2007, 06:09 AM

skewbe looks right, you might want... 08-04-2007, 07:16 AM

sonyhome skewbe: I'd love to code... 08-04-2007, 09:51 PM

mpmetro i know...:o i cant solder. 08-05-2007, 01:27 PM

itjstagame I've already done some of the... 08-06-2007, 06:04 AM

skewbe sonyhome: Yes on all accounts... 08-06-2007, 09:35 PM

itjstagame Wouldn't you need to pull... 08-12-2007, 01:37 PM

itjstagame Ok, so you're on the same leg... 08-07-2007, 12:00 PM

cfg83 skewbe - Have you thought... 08-07-2007, 01:45 PM

itjstagame This should work fine on... 08-12-2007, 01:35 PM

skewbe I had to make compromises... 08-12-2007, 01:49 PM

sonyhome Think of the diode as an open... 08-13-2007, 09:05 AM

Bill in Houston A diode is also a "one-way... 08-13-2007, 09:25 AM

mpmetro yay... I just connected mine... 08-13-2007, 05:25 PM

skewbe Way Cool!! Try this: locate... 08-13-2007, 06:11 PM

mpmetro I have also noticed that now... 08-14-2007, 11:27 AM

Silveredwings Sounds like input loading by... 08-14-2007, 11:59 AM

skewbe or it may need to be isolated... 08-15-2007, 04:11 AM

skewbe Also, are you auto or stick? ... 08-15-2007, 09:06 PM

mpmetro my 91 is a 5spd manual. But I... 08-18-2007, 09:42 PM

sonyhome Wouldn't a CEL code risk... 08-20-2007, 02:02 AM

skewbe Thanks Doc, I don't know... 09-12-2007, 04:12 PM

ami8i Hello skewbe, thank you very... 12-09-2007, 11:20 PM

skewbe wow, 16mb, I did not... 12-18-2007, 05:06 PM

FritzR hey skewbe if the purpose... 02-01-2008, 11:29 AM

rsxer63 Does anyone know if this... 06-24-2008, 09:10 AM

sonyhome Try to load the applet on it,... 06-24-2008, 10:05 AM

sonyhome Don't expect to have it right... 07-24-2008, 04:23 PM

jim-frank I've recently gotten this to... 08-26-2008, 08:01 AM

curjones I'm kinda lost here. May... 09-02-2008, 04:46 AM

theholycow The idea is pretty cool: You... 09-02-2008, 05:12 AM

curjones So you buy the program,... 09-02-2008, 06:10 AM

theholycow That's a good question about... 09-02-2008, 07:12 AM

curjones Was the name Audacity. That... 09-02-2008, 07:23 PM

curjones This site has good inf0 09-02-2008, 08:15 PM

theholycow Audacity is a great audio... 09-03-2008, 04:36 AM

sonyhome I'm too lazy to search though... 09-03-2008, 08:19 AM

theholycow Oh....it's this thread!... 09-03-2008, 09:00 AM

GasSavers_Lurch ummm, is this device you... 09-06-2008, 10:30 AM

itjstagame How can you say it's complex?... 09-12-2008, 10:54 PM

itjstagame Wow this brings back... 09-12-2008, 08:11 AM

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itjstagame Man, why did I take a year to... 09-12-2008, 10:52 PM

EvilToothpaste You probably should be... 02-25-2009, 11:21 AM

sonyhome I'd be interrested in your... 02-25-2009, 11:44 AM

EvilToothpaste I'll draw a schematic... 02-25-2009, 03:57 PM

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EvilToothpaste Java program 02-26-2009, 06:19 AM

itjstagame Ha, I was adding RPMs are 2 *... 09-14-2008, 02:48 PM

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itjstagame Ok, another question in case... 09-15-2008, 05:57 AM

itjstagame Well hooked into the VSS and... 09-18-2008, 05:52 AM

sonyhome Aahh... I still have to do... 10-19-2008, 12:20 AM

theholycow I think most ECUs are on the... 10-19-2008, 04:05 AM

sonyhome What? You don't have your... 10-19-2008, 08:50 PM

itjstagame Sweet updates! Well I still... 10-20-2008, 12:29 PM

sonyhome LOL! Yeah, no way you can be... 10-20-2008, 01:47 PM

theholycow Yes, but a cycle requires two... 10-20-2008, 02:13 PM

itjstagame Yes, when I say cycle I mean... 10-21-2008, 05:27 AM

theholycow Yeah, that discussion was a... 10-21-2008, 06:20 AM

itjstagame Good point, I'm sure we could... 10-21-2008, 07:05 AM

Energy Recruitment diy mpg gauge 11-01-2008, 09:54 AM

Jay2TheRescue Welcome to the site. As I... 11-01-2008, 10:03 AM

Billman2002 Software 11-09-2008, 02:45 PM

theholycow There's many free programs... 11-10-2008, 04:47 AM

Billman2002 thanks, however I need... 11-10-2008, 05:33 AM

theholycow Oh, now I think I understand... 11-10-2008, 05:41 AM

Billman2002 Yup it sucks. I dont... 11-10-2008, 05:53 AM

Dalez0r Arg! Trying to do this on my... 11-29-2008, 02:03 PM

bnapalm Hello, everyone! Although I... 02-11-2009, 03:27 PM

sonyhome There was a sound file... 02-11-2009, 03:44 PM

bnapalm Thank you for the quick... 02-11-2009, 04:07 PM

EvilToothpaste Hello people. I too have... 02-25-2009, 11:04 AM

bnapalm Hello, EvilToothpaste! Nice... 02-26-2009, 10:00 AM

theholycow What model of laptop comes... 02-26-2009, 10:16 AM

bnapalm theholycow: it does have... 02-26-2009, 12:44 PM

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EvilToothpaste Bnapalm, 02-26-2009, 03:30 PM

bnapalm OK, I sent my e-mail address... 02-26-2009, 10:53 PM

itjstagame Cool people are doing stuff!... 04-13-2009, 11:11 AM

EvilToothpaste I will post what my values... 04-14-2009, 03:12 PM

itjstagame Sorry I disappeared there. ... 05-19-2009, 12:21 PM

EvilToothpaste Well, I wish I could help... 06-01-2009, 07:04 AM

itjstagame Gallons is total gallons... 06-10-2009, 10:29 AM

itjstagame Could your issue be channel... 06-23-2009, 01:09 PM

itjstagame Ok, so I was getting a lot of... 06-25-2009, 02:41 PM

dkjones96 Okay, so I've been doing a... 07-10-2009, 11:59 AM

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masster Hi I am new to this forum, I... 12-19-2012, 08:02 PM

Jay2TheRescue If your car has a carburetor,... 12-20-2012, 03:11 AM

masster I know my carburetor and many... 12-20-2012, 05:28 AM

Jay2TheRescue I guess. I've just never... 12-20-2012, 06:05 AM

masster Please have a look in here:... 12-20-2012, 07:21 AM

Jay2TheRescue It looks pretty good, but as... 12-20-2012, 07:29 AM

theholycow I'm not sure I understand... 12-20-2012, 01:13 PM

masster I guess I wasn't explicit... 12-20-2012, 07:44 AM

Jay2TheRescue It appears to be something... 12-20-2012, 08:29 AM

masster Not to my knowledge, because... 12-20-2012, 11:41 AM

masster I'm thinking of dirty... 12-20-2012, 03:16 PM

theholycow Ah, good point. I suppose... 12-20-2012, 04:33 PM

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07-21-2007, 12:12 PM	#11
sonyhome Registered Member Join Date: Jul 2007 Posts: 150	Pretty cool ... but I don't quite understand your diode clamp interface you used. Could you explain how you make it work? You connected directly to the injector via a 10K resistor? And then you grounded the signal via a diode bridge? Is that to avoid having signals above 0.6V? Don't understand... And what's VSS for? I though you'd use a coil to detect the pulses so the laptop would be totally independant from the car's electrical circuit... All you have to do now to compute duty cycle is count the number of samples above a threshold vs all the samples. You may need to adjust with a constant, or adjusting the threshold since the ramp up slope is not vertical, but seems constant. __________________

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