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Thread: HU Quality AM/FM RDS/RBDS Radio with Features

  1. #311
    Jesus Freak antimatter's Avatar
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    Quote Originally Posted by Seth
    We're slowly getting there guys. We're figuring out many oddities actual HU designers face step by step. Also the signal processor has so many parameters to play with it makes your head spin .
    Even though we are familiar with RF theory most of the fine tuning is done through trial and error (playing with settings) so it will take a while to find the sweet spot .

    Now we all know it works, it can only get better and better from now on
    Keep up the good work guys
    -Jesus- King of Kings Lord of Lords

  2. #312
    Raw Wave rando's Avatar
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    CRAM Engineering Model V.02 (look mom, it's a black plastic box).
    This is what people saw at the LA carpc meet yesterday. Yes, this is MUCH bigger than the production solution will be
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  3. #313
    Raw Wave rando's Avatar
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    Here's the mess inside. The board on bottom houses the signal processors, tuner, and all the line in/out passive circuitry. The board (upside down) on top holds the +5V and 8.5V power supplies, the microcontroller (not in use yet) and a rs232 line level converter (also not in use yet). There also a bunch of excess solder traces and junk on that top board because it's actually the remnant of the failed V0.1 CRAM EM.
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  4. #314
    MySQL Error jcdillin's Avatar
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    man now you got me wanting to get one of these tuners to play with
    肚子笑痛了
    S60 Install

  5. #315
    Raw Wave rando's Avatar
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    Here's a profile shot of the mess going on inside of there. For those of you who wanted to buy the EM on the spot, are you sure now?
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  6. #316
    Raw Wave rando's Avatar
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    And for true comic value, here's what the failed V0.1 CRAM EM looked like. Warning kids, don't try to attach a QFP44 like this!!!!

    The huge board (4"x4") at the bottom of CRAM V0.2 EM is an adapter for the QFP44 signal processor. In other words, it let's us make a proper solder connection of that part to the circuit.
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  7. #317
    Low Bitrate Stonewall78's Avatar
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    Quote Originally Posted by rando
    And for true comic value, here's what the failed V0.1 CRAM EM looked like. Warning kids, don't try to attach a QFP44 like this!!!!

    The huge board (4"x4") at the bottom of CRAM V0.2 EM is an adapter for the QFP44 signal processor. In other words, it let's me make a proper solder connection of that part to the circuit.
    Now that is funny, why did you just not buy a cheap adapter board? more then likely the same reason I never do, the get it done now syndrome

  8. #318
    Raw Wave rando's Avatar
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    Quote Originally Posted by Stonewall78
    Now that is funny, why did you just not buy a cheap adapter board? more then likely the same reason I never do, the get it done now syndrome
    That and -- we couldn't find a cheap adapter board for the QFP44. The adapter we used in V0.2 was $30; not exactly cheap!

    But basically you nailed it right. This project has been dragging on for a long time. We got impatient and just wanted to get the important parts of the circuit assembed as quickly as possible -- by any means possible -- to show that it works. It does! Now we can safely spend some cash to build proper prototypes and not get raped for buying low volume. As far as we know Racemier went straight to manufactured PCBs for Design A and B. We're not sure how many frisbees he created, if any. For us, that approach is too costly because we know we'll make many mistakes on the way.

    As a project, it's clear we are heading down a path of producing 1, 2 or possibly 3 working solutions. The more the merrier in my book.

  9. #319
    Maximum Bitrate Seth's Avatar
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    Quote Originally Posted by rando
    And for true comic value, here's what the failed V0.1 CRAM EM looked like. Warning kids, don't try to attach a QFP44 like this!!!!

    The huge board (4"x4") at the bottom of CRAM V0.2 EM is an adapter for the QFP44 signal processor. In other words, it let's me make a proper solder connection of that part to the circuit.
    Crap...that was our "Insider's funny stuff"...now everybody knows

  10. #320
    Newbie
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    What is in fact the difference between the 3 models? Do they have different functions or do they all the same?
    Has anybody an idea when we can buy this? I know that it isn't easy to say but i mean: a few months, a year,..

    Grtzzz
    Viper

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