Page 12 of 114 FirstFirst ... 234567891011121314151617181920212262112 ... LastLast
Results 111 to 120 of 1134

Thread: Custom USB tyre pressure monitoring interface

  1. #111
    Maximum Bitrate Robby BMW's Avatar
    Join Date
    Aug 2005
    Location
    Italy
    Posts
    558
    Quote Originally Posted by mrbean_phillip View Post
    @ Robby BMW: Is there a Microchip HCS515 decoder anywhere on the circuitry? Any of the boards?
    No, there are only a PIC 16C621A used for handling and decoding the received signal, a PIC 16C926 used to drive the LCD display, an EEPROM 24C02W6 I think used to store the data and of course a TDA 5200 used in the RF part.
    _______________________________________
    Car installation 95% [■■■■■■■■■■■■■■■■■■■]
    Current project: Parking sensor USB interface

  2. #112
    inh
    inh is offline
    Maximum Bitrate
    Join Date
    Jan 2007
    Location
    Fort Riley KS
    Posts
    515
    Looks like the receiver board from the third eye just spits out the raw data, and robby's PIC decodes it..

    Which means we buy the TDA5200's, build the board and robbys circuit, and then order $100 worth of in-wheel sensors =] There! We've already cut costs in half!
    cashtexts - Earn money for receiving text messaged offers
    cashtexts review not a scam
    Space Navigator - 6 Axis input device: Take it apart - Driver App
    RRCam - Video/webcam capture, text overlay, and recording: 2.0 Stable

  3. #113
    Constant Bitrate
    Join Date
    Jul 2006
    Posts
    159
    I would much rather see a home-grown solution anyway. The problem with taking the pre-built unit and hacking it is that makes you dependant on the manufacture and supplier of the other unit. Plus, you are buying a $250 item and not using half of it.

    I mentioned earlier that I can get a hold of a couple of different TPMS reciever units. I can get an 08 Honda, 08+ Kia, and a few others. Robby, if you want me to send you some of them, just let me know. This may help in developing our own version of this thing.

  4. #114
    Maximum Bitrate vicky_obee's Avatar
    Join Date
    Dec 2003
    Posts
    562
    Well if some 1 can get me the whole working module/kit at a reasonable price i would like to have 1 as well pls
    Commell LV-677 DC 6 x 6" Mother Board
    2.6 GHz; 1 Gb Ram
    120 Gb Laptop HD
    7" InDash Xenarc MTD - X7000 Screen
    Gyration Mouse ; GPS Mouse ; ELM Scan ; TPMS
    Parrot MK 6000 & iPhone
    ----------
    Re done the carputer...Into the Glove Box !!

  5. #115
    Super Moderator. If my typing sucks it's probably because I'm driving.... turbocad6's Avatar
    Join Date
    Oct 2004
    Location
    NY
    Posts
    6,234
    what I think would be sweet would be if you were able to do robbies interface & still have the display too, is this possible? tap into the data instead of diverting the data?

    just curious, def not a deal breaker, but that would be cool to for some installs I think...

  6. #116
    Maximum Bitrate
    Join Date
    Feb 2006
    Location
    Melbourne, Australia
    Posts
    649
    Quote Originally Posted by inh
    Looks like the receiver board from the third eye just spits out the raw data, and robby's PIC decodes it..

    Which means we buy the TDA5200's, build the board and robbys circuit, and then order $100 worth of in-wheel sensors =] There! We've already cut costs in half!
    Exactly That's why I want to do it this way, it would help in saving costs...

    Quote Originally Posted by turbocad6
    what I think would be sweet would be if you were able to do robbies interface & still have the display too, is this possible? tap into the data instead of diverting the data?

    just curious, def not a deal breaker, but that would be cool to for some installs I think...
    From an electronic perspective this would be easy, as you can intercept the datastream where it heads into the factory decoder pic, and divert it to Robby's solution......then you have the best of both worlds.

    Quote Originally Posted by robbybmw
    No, there are only a PIC 16C621A used for handling and decoding the received signal, a PIC 16C926 used to drive the LCD display, an EEPROM 24C02W6 I think used to store the data and of course a TDA 5200 used in the RF part
    Thanx Robby, I could actually read the code of one of your pictures, the TDA5200 part that is.

    I know the 16C926 fairly well as an integrated LCD driver pic, so they must use the 16C621A for decoding then.

    Well, this really confirms then that we need to find TPMS receivers running 433.92Mhz, making use of FSK - so it narrows the field down a lot.....even the 315Mhz USA version receivers should work just fiine - generally 433.92Mhz is used in the EU, and 315Mhz receivers in the USA.

    Just something to look at for, but it is generally just a case of changing the onboard crystal oscillator to a different speed rating, and maybe changing the 64x or 128x freq multiplier on the chip to either ground or floating....

    Easy enough.

    Well, I will do some reading on this on the weekend, and notify you guys of anything interesting.

    Kind regards,
    Beanie.
    F6 Tornado Project Log ; HP Blackbird Watercooled Server

    Beta Tester for Centrafuse and 3dConnexion (No business affiliation with either)

  7. #117
    Super Moderator. If my typing sucks it's probably because I'm driving.... turbocad6's Avatar
    Join Date
    Oct 2004
    Location
    NY
    Posts
    6,234
    Quote Originally Posted by mrbean_phillip View Post

    From an electronic perspective this would be easy, as you can intercept the datastream where it heads into the factory decoder pic, and divert it to Robby's solution......then you have the best of both worlds.
    thanks, that's the route I'm going to take with this, so the data stream won't be hurt by being tapped & feeding 2 different pics at the same time? if that's the case then this is really cool & worth the extra for the whole kit I think..

  8. #118
    Maximum Bitrate
    Join Date
    Feb 2006
    Location
    Melbourne, Australia
    Posts
    649
    Hey Turbocad6,
    Being a digital stream it should be ok, it is the same as if sitting ontop a RS-comms link and snooping data, or, for a better example, consider a standard ethernet netowork

    The data is available to anyone, but only those that needs to respond will.....so, in this case, you send the data down the link, and whoever is "authorized" to listen can.....
    F6 Tornado Project Log ; HP Blackbird Watercooled Server

    Beta Tester for Centrafuse and 3dConnexion (No business affiliation with either)

  9. #119
    Variable Bitrate
    Join Date
    Nov 2004
    Posts
    242
    Viva TPMS update:

    If anyone would like to order the kit right now, you can use coupon code "3RDEYE10%" to receive an instant 10% off.

    http://www.vivaperformance.com/catal...roducts_id=444

    Charges will be adjusted depending upon how many end up purchasing the TPMS, meaning the more orders, the higher the discount (max discount = 25%)!

  10. #120
    Super Moderator. If my typing sucks it's probably because I'm driving.... turbocad6's Avatar
    Join Date
    Oct 2004
    Location
    NY
    Posts
    6,234
    cool, I just ordered mine

    robbies gonna send me the pic, now I just gotta figure out how to get a board made, this is a really cool setup...

Similar Threads

  1. Core Duo / Core 2 Duo Mini-ITX boards
    By RedGTiVR6 in forum General Hardware Discussion
    Replies: 153
    Last Post: 10-03-2010, 11:30 PM
  2. USB self powered hub, which one
    By htsource in forum General Hardware Discussion
    Replies: 5
    Last Post: 07-26-2007, 04:31 PM
  3. Will this layout with a remote USB hub work?
    By NoPistonPC in forum General Hardware Discussion
    Replies: 14
    Last Post: 08-21-2005, 04:24 PM
  4. USB Earthmate - patch for gpsd support
    By dignome in forum GPS
    Replies: 4
    Last Post: 04-05-2005, 11:44 AM
  5. Replies: 4
    Last Post: 04-06-2004, 10:52 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •