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Old 04-18-2010, 09:32 PM   #1371 (permalink)
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800 x 600 display! Whoo Hoo!

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Old 04-18-2010, 11:13 PM   #1372 (permalink)
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Ben -

The "GM standard" for most of their fuel sending units is a simple signal between 0-90 ohms resistance in a pot-controlled circuit. As the fuel sending unit's level sensing arm goes up, impedance increases (maybe... could be the other way) and the needly thingy rises in the gauge.

Maybe if you put a controlled 40 ohm signal to it (at 12VDC) it will read ~1/2 tank? Couldn't hurt to try?
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Old 04-18-2010, 11:47 PM   #1373 (permalink)
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Quote:
Originally Posted by Christ View Post
Ben -

The "GM standard" for most of their fuel sending units is a simple signal between 0-90 ohms resistance in a pot-controlled circuit. As the fuel sending unit's level sensing arm goes up, impedance increases (maybe... could be the other way) and the needly thingy rises in the gauge.

Maybe if you put a controlled 40 ohm signal to it (at 12VDC) it will read ~1/2 tank? Couldn't hurt to try?
On the Saturn - resistance in to PCM - varying square wave out to meters BUT I think resistance should work - on temp gauge use a thermistor and embed it inside a bolt to pickup engine heat - use a pot across to scale it -- the Saturn shows HOT at 50 ohms.. Hey Ben are you going to drag everything to the MREA this year?
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Old 04-19-2010, 09:36 AM   #1374 (permalink)
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Electro-Metro - '96 Ben Nelson's "Electro-Metro"
90 day: 129.81 mpg (US)

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I am planning on being at the MREA this year.

Not sure exactly what I will bring with. I showed the Metro last year, and the motorcycle the last 3. Not really anything new with the motorcycle, so I might not bring that. On the other hand, people usually look at the motorcycle and say "I could build something like that."

I also applied to do a presentation on "How to build an Electric Car." I am not sure when exactly they choose what presentations are done. Last year they had a presentation on either bio-diesel or veggie oil, but NOTHING on EVs.
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Old 04-19-2010, 02:56 PM   #1375 (permalink)
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I also applied to do a presentation on "How to build an Electric Car." I am not sure when exactly they choose what presentations are done. Last year they had a presentation on either bio-diesel or veggie oil, but NOTHING on EVs.
Agree it would be great for you to have a presentation - I was going to bring the Saturn - not sure yet - I am extremely good friends with the people that own all the land around the MREA - so I can leave the car at the farm there. Their father donated the land to the MREA years ago... Not sure if I can show it as I can't be there all days - er, some of us old codgers have to work LOL ...

BUT I will be there - and think you would provide a large interest on the "How to build an Electric Car."...

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Old 04-26-2010, 03:33 PM   #1376 (permalink)
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Electro-Metro - '96 Ben Nelson's "Electro-Metro"
90 day: 129.81 mpg (US)

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I got the official reply from the MREA that I WILL be doing the presentation "HOW TO BUILD AN ELECTRIC CAR" at the energy fair this summer.

Also, today I used first gear in the Metro. I NEVER use first gear. It is SO slow, and second or third have plenty of power for pulling away from stops.

However, I needed to move the S10 and Mercedes 240D today, and neither has an engine in it. Well, neither does the Metro, but it at least has the forklift motor.

I used the car to push the other vehicles around my driveway to help hide the Mercedes from the picky neighbors who won't want to see it it stripped down.

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Old 04-26-2010, 07:43 PM   #1377 (permalink)
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Great Ben! I will def see you at the presentation

Nice work with the neighbors lol.... Picky - picky !!
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Old 08-02-2010, 10:40 AM   #1378 (permalink)
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Whats Up??

I have finnaly read this whole thread - took me almost a week(not full time of course). I'm a newbie and have started to get all the necessary parts together for my own EV. There hasn't been anything on this thread for 4 months - anything new??? The information that Ben has put up here is excellent - Just wanted to say thank you!

Rich
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Old 08-02-2010, 11:00 AM   #1379 (permalink)
EV test pilot
 
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Join Date: Jan 2008
Location: Oconomowoc, WI, USA
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Electric Cycle - '81 Kawasaki KZ440
90 day: 334.6 mpg (US)

S10 - '95 Chevy S10
90 day: 30.48 mpg (US)

Electro-Metro - '96 Ben Nelson's "Electro-Metro"
90 day: 129.81 mpg (US)

The Wife's Car - Plug-in Prius - '04 Toyota Prius
90 day: 78.16 mpg (US)
Thanks: 17
Thanked 655 Times in 383 Posts
Nothing really new on the project.

I have done a presentation or two on the car this summer, but no major changes to the vehicle or anything.

I do now have an instructional DVD on how to build an electric car, which is based on this project. You can check that out over on 300MPG.org

-Ben

PS: Oh wait, there is something new. I did send in the paperwork for getting custom license plates! I won't say what's going to be on them. I would rather just post a photo once I get them on the car.
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Last edited by bennelson; 08-02-2010 at 11:03 AM.. Reason: web link and plates
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Old 08-02-2010, 01:11 PM   #1380 (permalink)
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PS: Oh wait, there is something new. I did send in the paperwork for getting custom license plates! I won't say what's going to be on them. I would rather just post a photo once I get them on the car.
Er not "REVOLT" ---

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