What microphone to use with tg Open Source Timing Software?
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  1. #1
    Member 1afc's Avatar
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    What microphone to use with tg Open Source Timing Software?

    Spoiler alert: This has been posted in the Open Source Software thread but there are so many responses that I think we need a specific one dedicated to microphones.

    I quote
    I've read a lot of the posts but I may have missed something so I'll ask anyway.
    tg is a fantastic piece of software and I enjoy using it.

    However, my main microphone is a an old USB voip phone that I have skinned down so the mic is not be obstructed by buttons etc.
    It works ok but is already many years old and I'm looking for a new one to take it's place because it will eventually break.

    So the questions are
    1. please let me know what USB mic you use and where you got it?
    2. is it a piezo mic?
    3. I have a soldering iron but that's about the extent of my electronics capabilities so has anyone found the need for an amp/filter and are there any workable modules that can be used without fabrication?
    4. Has anyone devised a good stand for positional checking?
    TIA

    End of Quote

    If it makes any difference I'm on a Windoze machine with USB2
    Last edited by 1afc; September 23rd, 2016 at 09:11.
    scoff and contrate_wheel like this.

  2. #2
    Member jdrichard's Avatar
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    Re: What microphone to use with tg Open Source Timing Software?

    What is TG and how do I get it? So I use tickoprint and had a machinist make me a stand that I could hold a mic in. I posted it some time ago.

    Sent from my GT-N5110 using Tapatalk

  3. #3
    Member 1afc's Avatar
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    Re: What microphone to use with tg Open Source Timing Software?

    Quote Originally Posted by jdrichard View Post
    What is TG and how do I get it? So I use tickoprint and had a machinist make me a stand that I could hold a mic in. I posted it some time ago.

    Sent from my GT-N5110 using Tapatalk
    Hi jdrichard

    I checked your posts but couldn't find the design. Would you be so kind as to post again please.

    Check out this thread which, at the time of writing, was just below this one.
    The software is available from the link in the first post I believe.
    Version I have is 0.3.1 which has the calibration mode.
    Open source timing software.

    For others not familiar let me include pics which compares against a Tiimegrapher 1000.
    Name:  Parnis 20160830.JPG
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Size:  227.1 KBName:  Timegrapher Parnis Small 20160830_121649.jpg
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    Last edited by 1afc; September 23rd, 2016 at 13:58.

  4. #4
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    Re: What microphone to use with tg Open Source Timing Software?

    Quote Originally Posted by 1afc View Post
    Spoiler alert: This has been posted in the Open Source Software thread but there are so many responses that I think we need a specific one dedicated to microphones.
    Agree, that thread is very long...

  5. #5
    Member 1afc's Avatar
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    Re: What microphone to use with tg Open Source Timing Software?

    It seems to be agreed that piezo mics don't perform well.

    Has anyone tried a telephone suction mic?

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    Re: What microphone to use with tg Open Source Timing Software?

    Quote Originally Posted by 1afc View Post
    It seems to be agreed that piezo mics don't perform well.
    Who did agree?

    According to my experience the piezo mics perform much better than the elektret-condenser type. With the piezo I have less sound from surroundings and more solid borne sound of the whatch.
    Of course size does matter. Frequency of the piezo as well as a suitable preamplifier do matter. Pay attention to the polarity of the piezo. Chance is 50/50
    On my preamp (Conrad kit 197688) a 15mm diameter piezo performs better than a 20mm piezo. I must admit I built up two identical preamps and both perform slightly different.

    USB-type: I tryed once to have the supply voltage using the USB --> a lot of hum --> would require a filter or stabilisation of the voltage. So I prefer the 9V block batteries for amp power supply.

    Hum-reduction: Using a laptop computer and unplug the mains adapter reduces hum as well slightly.

    Would be interesting if someone tried to use the amp of an USB-VOIP and attached a piezo instead of the elektret-mic.

  7. #7
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    Re: What microphone to use with tg Open Source Timing Software?

    Piezo pickups are very high impedance devices and a lot of preamplifiers don't work particularly well with them. I've got a couple of them on order and will try them with a high-quality preamp/USB interface and report back here as to how it worked.

  8. #8
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    Re: What microphone to use with tg Open Source Timing Software?

    I've used the piezo preamp here; Building a Microphone Amplifier - Watch Timing System and found that works quite well with the TG software. Though it might be a bit tricky for a beginner to build

  9. #9
    Member jdrichard's Avatar
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    Re: What microphone to use with tg Open Source Timing Software?

    I think I said this before but just cut the ear bud parts off a pair of headphones and use that little mic part that is remaining. I have done this and it works like a charm.


    Sent from my iPhone using Tapatalk Pro

  10. #10
    Member 1afc's Avatar
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    Re: What microphone to use with tg Open Source Timing Software?

    I'm still not having any success with my setup.

    I bought a piezo mic after someone on the main thread suggested it worked well but it looks like I need a preamp.

    Problem is I'm not good at electronics so I've enlisted a mate to give me a hand when he gets time.

    You good people may be able to give me some pointers though.

    I'm attempting to use a mic with a 6.5mm jack into a USB connector.
    Sounds like the suggestion is to go directly to the sound card with a pre amp and to put external power (battery) on the pre amp. Is that correct?
    Also does any one know if any of the pre amp modules on ebay any good? The basic ones seem to have a treble, a base and a volume setting.

    Thanks for your help.

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