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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 12-06-2011, 05:18 AM   #1 (permalink)
EcoModding Lurker
 
Join Date: Sep 2011
Location: RI
Posts: 1

The green car - '01 Subaru Legacy L
90 day: 25.91 mpg (US)
Thanks: 0
Thanked 1 Time in 1 Post
Freescale MC33290 Replacement

This info was hard to find, so I decided to make a thread. The SI9243 seems to be a replacement for the Freescale IC described in the OBDuino documentation and is available in small quantities at Newark (not Mouser or Digikey):

The relevant posts in the OBDuino thread are on page 69 (I can't post links).

  Reply With Quote
The Following User Says Thank You to manford_desmond For This Useful Post:
lamb.chop (01-23-2012)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 12-22-2011, 11:11 PM   #2 (permalink)
EcoModding Lurker
 
Join Date: Dec 2011
Location: Singapore
Posts: 1
Thanks: 0
Thanked 2 Times in 1 Post
Smile the Si9241A seems to be a suitable replacement as well...

Someone else commented in the OBDuino wiki that the Vishay Si9241A works as well (tried and tested). I have ordered the Si9241A and am waiting for it to arrive.

Will provide feedback again after trying it out for myself.
  Reply With Quote
The Following 2 Users Say Thank You to icynjuve For This Useful Post:
Daox (11-01-2018), lamb.chop (01-23-2012)
Old 01-19-2012, 11:46 AM   #3 (permalink)
EcoModding Lurker
 
Join Date: Jan 2012
Location: Warwick, UK
Posts: 22
Thanks: 24
Thanked 1 Time in 1 Post
What about the Freescale MC33660, available from Freescale as samples for $6 for 5......
  Reply With Quote
Old 01-24-2012, 06:28 AM   #4 (permalink)
EcoModding Lurker
 
Join Date: Jan 2012
Location: Warwick, UK
Posts: 22
Thanks: 24
Thanked 1 Time in 1 Post
Ordered 5 samples, received yesterday, excellent service........
  Reply With Quote
Old 02-10-2012, 02:34 PM   #5 (permalink)
dar
EcoModding Lurker
 
Join Date: Apr 2011
Location: Lithuania
Posts: 16
Thanks: 0
Thanked 3 Times in 2 Posts
I used SI9243 (only K line) and it works. Better quality schematic:


Realization:



OLD link: http://ecomodder.com/forum/showthrea...tml#post232163

Last edited by dar; 02-10-2012 at 03:15 PM..
  Reply With Quote
The Following User Says Thank You to dar For This Useful Post:
Daox (11-01-2018)
Old 08-25-2012, 09:49 AM   #6 (permalink)
EcoModding Lurker
 
Join Date: Jul 2012
Location: Earth
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
Here you take +12V on car cigar socket? You take only +12V without car sigar socket's ground?
  Reply With Quote
Old 08-27-2012, 12:57 PM   #7 (permalink)
dar
EcoModding Lurker
 
Join Date: Apr 2011
Location: Lithuania
Posts: 16
Thanks: 0
Thanked 3 Times in 2 Posts
There is no need for additional +12V supply from car cigaret socket. The schematic gets +12V from OBD socket.
This schematic was used instead of MC33290 in standard OBDuino ISO diagram.
Link: OBDuinoDiagram - opengauge - Whole diagram of the Arduino board, LCD, interface - Open Source Fuel Efficiency Instrumentation - Google Project Hosting
P.S. Only difference is in 510R, which was increased to 560R (That I found in internet).
P.P.S. 1N4004, 100R was used for protection SI9243 (from SI9253 datasheet).

Best regards
  Reply With Quote
Old 09-03-2012, 12:58 PM   #8 (permalink)
EcoModding Lurker
 
Join Date: Jul 2012
Location: Earth
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
I'm trying to make it with 9243. And for example pin1 of DB9 connects to 9243 and also somewhere else. On the other side that DB9's pin1 goes to OBD pin5. In my car, OBD pin5 doesn't have contacts. My car is a Rover. Any ideas?
  Reply With Quote
Old 09-07-2012, 04:40 PM   #9 (permalink)
dar
EcoModding Lurker
 
Join Date: Apr 2011
Location: Lithuania
Posts: 16
Thanks: 0
Thanked 3 Times in 2 Posts
1. I had very similar situation: In my car (VW Passat) in the cars OBD connector wasn't pin 4, which goes to DB9 pin 1 (GND ground). So I connected together DB9 pins 1 and 2 (OBD 4 and 5).
Have You looked in OBDuino page?
Link: OBDuinoInterface - opengauge - OBDuino OBD2 cable and Interfaces - Open Source Fuel Efficiency Instrumentation - Google Project Hosting
Link: OBDuino32K - opengauge - Homepage of the OBDuino32K Project - Open Source Fuel Efficiency Instrumentation - Google Project Hosting
2. Which OBD protocol is used in yours car (Rover) it is necessary to check in internet?
From OBDuino page link: OBD-2 Liste (erfolgreich) gescannter Fahrzeuge - Rover (2000 year) - ISO 9141-2

Best regards
  Reply With Quote
Old 09-10-2012, 11:19 AM   #10 (permalink)
EcoModding Lurker
 
Join Date: Jul 2012
Location: Earth
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
Yeah I've looked at these pages.
My rover is older, 1997, as far as I know it uses the older iso 9141 standard.
How did you know which pins to connect together? I don't even know the correct orientation of my car's obd connector. But I checked either ways and in none of these pin 5 would have contacts.

  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com