Page 1 of 2 12 LastLast
Results 1 to 10 of 13

Thread: Sproggy Part Question

  1. #1
    Low Bitrate
    Join Date
    Jan 2002
    Location
    Frederick, MD
    Posts
    99

    Question Sproggy Part Question

    While checking the component list (.pdf) for the Sproggy 2.6 power supply, I noticed that one of the inductors from Coilcraft was listed as T6 (Q4339-B) but on the other side of the page was listed as Q4338-B, which is the T5 package

    The previous 2.5 version had the T6(Q4339-B) listed in both places. Was this just a typo or are the parts interchangeable? Both are available from Coilcraft and they look to be very similar. However, I'm not ignorant enough to believe I could tell the difference (software guy, trying to learn hardware) and I don't want a smokescreen as a new feature for my car. Can anyone help me out?

    Thanks,
    Brian

  2. #2
    FLAC mp3z24's Avatar
    Join Date
    Apr 2001
    Location
    Chicago Suburbs
    Posts
    1,282
    the q-4339b is the correct part. it isnt an inductor, it is a flyback transformer (alright, almost an inductor). you want the T6. but you are not going to get it from coilcraft. no free samples, part cost is $10 each, and shipping/handling is another $10. they got tired of people raping them of free samples on the transformers and the choke inductors. there are about a dozen posts that will tell you this!! check out renco for the transformer, or talk to mastero, he might be able to sell you one, hopefully cheaper than coilcraft.

    definately do a search for sproggy inductors or transformers... much info is awaiting you!!!

    ~mike
    Single Member of the "1000 Post and No MP3 Car" Club
    PROJECT ON INDEFINATE HOLD... BOUGHT A HOUSE
    2000 Cavalier Z24 [###-------] Only 30% Done ... Still

  3. #3
    Low Bitrate
    Join Date
    Jan 2002
    Location
    Frederick, MD
    Posts
    99
    I happen to have 6 each of the flyback transformers (Q4338-B and Q4339-B) and 6 each of 2 different inductors from Coilcraft. I just wanted to verify if the parts were interchangeable.

    The parts aren't unavailable from them. You just have to ask really nicely and have a good reason (a car mp3 player isn't one, so be creative).


    Thanks,
    Brian

    p.s. When my supply is working (hopefully soon) and if I haven't destroyed all of them, I'll happily make the extra available to others for free.

  4. #4
    FLAC mp3z24's Avatar
    Join Date
    Apr 2001
    Location
    Chicago Suburbs
    Posts
    1,282
    very smooth!!!!

    i knew that you could get them as samples, but i didnt want to put in the effort of trying to convince them. so i went elsewhere.

    i just checked the schematics for the t5 and t6...

    both *will* work but if you use the t5 you will have to do some special wiring...(read: dont use it if you have the t6) the t5 has 5 outputs, but the 2 outputs with the same winding count are on opposite sides of the transformer... if you used that one you would have to cut the legs on pins 7, 8, 3, and 4. then you would have to jump legs 3 and 4 to the board connections for 7 and 8. too much work if you already have the t6...

    THEY ARE NOT DIRECTLY INTERCHANGABLE

    ~mike
    Single Member of the "1000 Post and No MP3 Car" Club
    PROJECT ON INDEFINATE HOLD... BOUGHT A HOUSE
    2000 Cavalier Z24 [###-------] Only 30% Done ... Still

  5. #5
    Low Bitrate
    Join Date
    Jan 2002
    Location
    Frederick, MD
    Posts
    99
    Very sweet. Exactly the kind of answer I was hoping for.

    Thanks,
    Brian

  6. #6
    FLAC mp3z24's Avatar
    Join Date
    Apr 2001
    Location
    Chicago Suburbs
    Posts
    1,282
    if you dont want some of those transformers (or all the extras) i wouldnt mind taking them off your hands for a couple of other projects i might be working on...

    i can pay for shipping if you want, let me know when you are done with the sproggy...

    ~mike
    Single Member of the "1000 Post and No MP3 Car" Club
    PROJECT ON INDEFINATE HOLD... BOUGHT A HOUSE
    2000 Cavalier Z24 [###-------] Only 30% Done ... Still

  7. #7
    Low Bitrate
    Join Date
    Jan 2002
    Location
    Frederick, MD
    Posts
    99
    Admittedly, I'm still in the circuit design learning phase, so it will probably be a while before I'm done. I'd be more than happy to give some to you then, though.

    I'm not so worried about jumping the pins on the Q4338-B since I'm making a new PCB design from scratch to get the shutdown controller on the same board. In fact, using a different transformer would probably make it easier for other people to get ahold of components before they clamp down on the free samples again.

    Brian

  8. #8
    Banned
    Join Date
    Jun 2001
    Location
    Adelaide, Australia
    Posts
    687
    HA!!! I tried asking them nicely before, in an email, not using their order form. I told them it was for a school project, (which is mostly true) but they still refused.. Had a whole conversation with them asking where I could get teh parts from and all that, but they still wouldn't give in.. :P ohh well

  9. #9
    Low Bitrate
    Join Date
    Jan 2002
    Location
    Frederick, MD
    Posts
    99
    It probably didn't hurt that I had them sent to an office with my title ("Engineer") and department ("Tech-R&D") listed and gave a fairly elaborate description of the system I was working on. Technically, I never lied about it, but for example, "mobile computing workstation integrating GPS technology, infrared communication, and real-time audio" sounds a lot better than "I want to play mp3 files in my car."

    Lastly, and this works for just about any free samples, it helps to be really, really polite but sound like you're on a tight deadline. My favorite is "I just got screwed by one of your competitors, Acme, and I really need a couple sample widgets by Monday. Is there any way you can help me out?"

    Brian

  10. #10
    Retired Admin Aaron Cake's Avatar
    Join Date
    Jan 2000
    Location
    London, Ontario, Canada
    Posts
    2,464
    Originally posted by THEMP3KID
    HA!!! I tried asking them nicely before, in an email, not using their order form. I told them it was for a school project, (which is mostly true) but they still refused.. Had a whole conversation with them asking where I could get teh parts from and all that, but they still wouldn't give in.. :P ohh well
    That's probably because they are sick and tired of giving free parts to freeloaders.

    Sorry to say, but you guys made your own bed, now you have to sleep in it.
    Player: Pentium 166MMX, Amptron 598LMR MB w/onboard Sound, Video, LAN, 10.2 Gig Fujitsu Laptop HD, Arise 865 DC-DC Converter, Lexan Case, Custom Software w/Voice Interface, MS Access Based Playlists
    Car: 1986 Mazda RX-7 Turbo (highly modded), 1978 RX-7 Beater (Dead, parting out), 2001 Honda Insight
    "If one more body-kitted, cut-spring-lowered, farty-exhausted Civic revs on me at an intersection, I swear I'm going to get out of my car and cram their ridiculous double-decker aluminium wing firmly up their rump."

Page 1 of 2 12 LastLast

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
  •