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Thread: Valentine One to a PC

  1. #131
    Newbie jimbonzzz's Avatar
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    Looks very nice. I am sorry that design didn't work for you either. You are probably getting sick of trying these different designs only to have them not work for you. But I promise you I did test them, and they work for me. I don't know if it is differences in COM port hardware, voltage levels, or what...

    Quote Originally Posted by drait
    I think tomorrow I'll try pulling my V1 into the house and see if it'll run on my workstation.
    That would definitely be the thing to try next.


    Quote Originally Posted by drait
    I've attached pics of the new interface. Maybe Jim can spot an error or something in my assembly-work.
    Nope, I looked it over good and I don't see any errors at all.


    Quote Originally Posted by drait
    EDIT: Jim, does the cap need to specifically be polarized? I've got a 1uF 50V non-polarized and that's the only variance I can think of from the components you've chosen.
    If it is electrolytic, then it should be. If you have doubts about the cap you used, try testing with one leg pulled out of the circuit. The cap is there to filter the voltage, and the circuit would probably work without it (or should I say, operate normally without it!)

    I really don't know what to tell you from here, trying it on another PC would be a good first step though. Also, I don't know how you were testing it before, but maybe try it with your car running, the voltage will increase slightly and this might increase the V1's output signal level.

    I'll try to play with the interface some more today and see if I can come up with any suggestions. Did you get your transistors from Radio Shack? If so, I'll go get a couple to test. Maybe RS has some funky transistors or someting...

    Jim

  2. #132
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    Quote Originally Posted by jimbonzzz
    If it is electrolytic, then it should be. If you have doubts about the cap you used, try testing with one leg pulled out of the circuit.Jim
    The 1microfarads electrolytics at Radio Shack are nonpolorized which I didn't even know existed until I went there. In my day, our electrolytics were polarized and we liked it damnit.

  3. #133
    Newbie jimbonzzz's Avatar
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    Quote Originally Posted by stoodo
    The 1microfarads electrolytics at Radio Shack are nonpolorized which I didn't even know existed until I went there. In my day, our electrolytics were polarized and we liked it damnit.
    OK, weird...I just check it out on the RS website. Leave it to RS to stock something strange like that. It looked like they're intended for audio crossovers etc, but I would think they would be fine in the interface circuit...

    Jim

  4. #134
    Newbie jimbonzzz's Avatar
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    Quote Originally Posted by drait
    You still need to power the V1 from either the direct-wire kit or the cig lighter adapter.

    The S1 interface is provided power from the serial port (unless Jim changes that part of the design).
    Ive been thinking some more about this, and this might be worth a try as well. The serial port signals aren't really meant to support a current load although many circuits use it for that. Voltage drops fairly quickly under load. I'm sure the 12V line from the V1 can supply more current...

    JIm

  5. #135
    Variable Bitrate drait's Avatar
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    Quote Originally Posted by jimbonzzz
    You are probably getting sick of trying these different designs only to have them not work for you.
    No problem at all Jim. I've been enjoying the building and testing experience. Like many others, I've always wanted to get into electronics, but never did.

    Did you get your transistors from Radio Shack? If so, I'll go get a couple to test. Maybe RS has some funky transistors or someting...
    Indeed. 2N3904s from RS. From the bottom looking up, and the flat side to the left, the pins are arranged collector, base, emitter (top to bottom).

    And from what I gather from the schematic, the emitter on both transistors go to ground.

    I'm also reporting that when I brought my V1 into the house and hooked it up to my XP workstation, it exhibited the same behavior as in the car; S1 'senses' the interface, but won't display any data. The second I disconnect it though, S1 tells me "Error: Software One Not Connected!"

    I tried pulling the cap off... still no change in S1.

    This is on a V1 with revision 2.909, which if I'm not mistaken, is a v1.7 V1. There may very well be a difference in signal output levels for the various V1 versions.

  6. #136
    Constant Bitrate minghi's Avatar
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    sweet. I always knew that the "James Bond" technology was gonna come to mp3car members someday.
    400W Power Amplifier -$25
    P3 laptop mobo-$30ish
    128MB RAM-$10
    6GB+80GB 2.5" HDDs-$130
    GPS-$60
    7" TS Lilliput-$280
    10" pioneer 500w sub-$55
    sony xm-3020 30W amp-$10
    jensen 340W A34XP amp-$40
    mp3car.com resources and members- priceless

  7. #137
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    Ok my turn for a dumb question

    Would something like this work?

    RS232 Level Converter

  8. #138
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    Can anyone make a version of that, or modify it, so it can minimize to tray and then come up during alert and make a noise?

  9. #139
    Variable Bitrate drait's Avatar
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    Quote Originally Posted by Trunk_Monkey
    Can anyone make a version of that, or modify it, so it can minimize to tray and then come up during alert and make a noise?
    I'm sure Jim has already added functionality to auto-restore on alert in v1.1.0. Why would it need to make a sound on the PC, since one the V1's main strong point is its unique (and easily distinguishable) audible indicators?

    If he decides to release an API, I'm sure one of the front end guys could make the FE handle any customized alerts.

  10. #140
    Variable Bitrate Saab9-5's Avatar
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    Quote Originally Posted by Trunk_Monkey
    Can anyone make a version of that, or modify it, so it can minimize to tray and then come up during alert and make a noise?
    Jim's already done that with version 1.1.0 of the software. Check out post number 107.

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