Go Back   EcoModder Forum > EcoModding > Instrumentation > OpenGauge / MPGuino FE computer
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 10-03-2011, 03:02 PM   #321 (permalink)
EcoModding Lurker
 
Join Date: Oct 2011
Location: Houston, TX
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
First Update...

So, I spent some time staring at the front wheel yesterday, and came up with an idea to rig the HES off the fork, and fit some small rare earth magnets in the bolts that hold the brake rotor onto the wheel. Gave the wheel a spin, and it worked... but not very well. Not well enough. I was using a bipolar latching HES, and I have to say, that is NOT the way to go for this application. When I placed my HES order, I didn't know there were different types available, much less what the differences were. The latching bipolar needs to see both North and South poles to work properly when you're reading off the face (as intended). I realized I could read off the edge of the sensor, and it would be happy with one pole or the other, and would 'see' it one way (North, for example) as it approached the front, and see it the other (South, for example) as it swept past and the sensor was picking it up from the back side. It seems to really reduce the size of the usable air gap when you do this though, and I didn't manage to get a reliable pulse train, and didn't have confidence I ever would get a reliable pulse train with that approach.

So, I've got three ideas competing for my next attempt:
  • Rig a unipolar HES instead, which I suspect will give me more reliable pulses
  • Rig a back-biased HES (aka gear tooth sensor, what's used in ABS speed sensors) to just pick up the rotor bolts directly (no magnets to attach, yay!)
  • Try to vampire off my ABS sensor, either directly or with a divide-by-12 circuit.

Does anyone know what the upper limit of the MPGuino's VSS pulse-per-mile capability is? I see lots of chatter up in the 16,000/mile range, but I may be getting in the ballpark of 85,000/mile if I go straight off the ABS sensor (I think - I haven't observed the pulse train on a scope, since I don't have one, but the sensor ring has about 100 teeth on it, and I'm guessing the wheel circumference is around 72 inches). I'm not even sure if there's a clean way to pick up that signal, and I'm still deciding if I even feel good about messing with the ABS system in this way... If the speed of that pulse train is too much for the MPGuino, then the /12 circuit should get it in a reasonable range.

But the gear-tooth speed sensor approach feels good from the simplicity and not messing with ABS system angles.

Any of these options are cheap enough to pursue, IMO.

Any suggestions/experiences?

Jason

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 10-03-2011, 03:42 PM   #322 (permalink)
EcoModding Lurker
 
Join Date: Aug 2011
Location: Sudbury Ontario
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Just a little update regarding enclosures.

It seems the dimensions of the MPGuino have changed. It no longer fits in the Radio Shack project box as reported elsewhere. I'm going to have to go with the 5"w unit available locally. The MPGuino is about an .125" to wide for the small box now.
  Reply With Quote
Old 10-03-2011, 09:39 PM   #323 (permalink)
EcoModding Apprentice
 
HighMPG's Avatar
 
Join Date: Sep 2011
Location: California
Posts: 145

Super Duty - '12 Ford F250 Super Duty XLT Long Bed Super-Cab
90 day: 15.29 mpg (US)
Thanks: 22
Thanked 7 Times in 6 Posts
I was looking up enclosures and the best bet is fabricating my own with acrylic sheet.
the MPGuino is about 1.75" (2" with buttons) x 3 1/8th" x 1" thick. plus it has those 3 buttons sticking out so putting my own clear case should be fun, I may have to add a led or two to have some different colors for the back light =D
__________________

Good Bye Insight Hello 6.7 Diesel Truck!
**My First Hybrid Insight**
  Reply With Quote
Old 10-04-2011, 08:44 AM   #324 (permalink)
EcoModding Lurker
 
Join Date: Aug 2011
Location: Sudbury Ontario
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
The 3 buttons are causing me some concern. I'm mounting mine to my bike (CBR250R) and water resistance is a concern. Assuming the unit does work on my bike, I'm going to have to look at rotating the LCD 180 degrees allowing me have the push buttons pointing down so that I don't have 3 points of entry pointing up.

All that being said, I picked up the 5" project box from Radio Shack last night and got started mounting the MPGuino into it. Should be able to finish it up tonight.
  Reply With Quote
Old 10-24-2011, 01:18 PM   #325 (permalink)
EcoModding Lurker
 
Join Date: Dec 2010
Location: Mt. Vernon, Indiana
Posts: 2

Bravada - '99 Oldsmobile Bravada
Thanks: 1
Thanked 0 Times in 0 Posts
Does anyone know how long it takes to get a MPGuino? I donated last week but still haven't heard back from anyone about my order. I don't mind if it takes a while to get it, I'm just curious where my money went.
  Reply With Quote
Old 10-24-2011, 01:37 PM   #326 (permalink)
Eco-ventor
 
jakobnev's Avatar
 
Join Date: Oct 2010
Location: sweden
Posts: 1,510

Princess - '92 Mazda MX-3 GS
House of Tudor
Team Mazda
90 day: 53.54 mpg (US)

Shirubāarō (*ω`*) - '05 Toyota Prius Executive
Team Toyota
90 day: 54.88 mpg (US)
Thanks: 64
Thanked 614 Times in 389 Posts
Send a message via MSN to jakobnev
Mine took three weeks.
__________________




2016: 128.75L for 1875.00km => 6.87L/100km (34.3MPG US)
2017: 209.14L for 4244.00km => 4.93L/100km (47.7MPG US)
  Reply With Quote
Old 10-24-2011, 04:00 PM   #327 (permalink)
EcoModding Lurker
 
Area51's Avatar
 
Join Date: Aug 2008
Location: Flora, IL
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
I got mine in 4 days back when I ordered it a couple of years ago.
  Reply With Quote
Old 11-07-2011, 07:34 PM   #328 (permalink)
EcoModding Lurker
 
Join Date: Dec 2010
Location: Mt. Vernon, Indiana
Posts: 2

Bravada - '99 Oldsmobile Bravada
Thanks: 1
Thanked 0 Times in 0 Posts
MPGuino order

Hey i still haven't gotten or heard from anyone about the MPGuino i ordered/donated for. Its been 3 weeks so far and i can't get anyone to respond to my emails. Can someone tell me who handles the orders now? If i can't buy one assembled ill just get the parts and make it with a arduino.
  Reply With Quote
Old 11-07-2011, 07:46 PM   #329 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location:
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 267 Times in 210 Posts
It's just slow, nobody is being forgotten.
__________________
WINDMILLS DO NOT WORK THAT WAY!!!
  Reply With Quote
Old 11-07-2011, 11:32 PM   #330 (permalink)
Ecomodding Inventor
 
Join Date: Jun 2011
Location: Graham county, Arizona
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Hey DCB,
If you have a snail mail addy to which money orders or checks can be sent--I wish I knew what it is, so I could send a donation to your efforts.
Tarheellaw

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
MPGuino release one workspace dcb OpenGauge / MPGuino FE computer 1061 01-17-2020 01:37 AM
For Sale Preassembled MPGUINO NEW $45. randall OpenGauge / MPGuino FE computer 1 10-24-2009 04:13 PM
MPGuino, Preassembled BRAND NEW Sean T. For Sale 4 10-22-2009 07:00 PM
Brand New MPGuino Preassembled Sean T. For Sale 1 06-17-2009 01:02 AM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com