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Thread: FlexMod P3 Analog/TTL Laser Diode Driver

  1. #61
    Join Date
    Jan 2005
    Location
    Norway
    Posts
    1,303

    Default

    Hi

    I did send the payment some time ago.. (1 month)
    And wonder if the flexmod is shipped out ?



    thank you

  2. #62
    Join Date
    Oct 2006
    Location
    Cleveland, Ohio
    Posts
    2,334

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    Lulighttec, it was good to meet you, too. With the information about which wires are the diode leads, the conversion of that green to analog with a FlexMod should be relatively straightforward.. measure the idle and max current out of the stock setup and tweak this to match.

    MSpencer, you've been given some good answers here. I wish they would put the pull up resistors on the DAC instead of the driver input.. it just doesn't make sense to have hte laser full on with nothing connected. The most likely solution for you is to add a pull up resistor on the ttl output of your controller (assuming it's an open drain output and not driven ttl output) and everything will be golden.

    Everyone: The large batch has now come in (2 weeks later than expected) and I'm shipping out orders. Expect to see shipping notifications from Google checkout as yours is charged, processed, and sent. Thanks for hanging in there!

    liteglow, yours is now on it's way!

  3. #63
    Join Date
    Mar 2010
    Location
    Phoenix,Az
    Posts
    285

    Default 3

    I'll take #3. PM me for toltal and s&h
    Emory
    BEAMANN (GODSLIGHT SHOWS)

  4. #64
    Join Date
    Aug 2010
    Posts
    10

    Smile

    Actually none of this will matter in the end. I tested my laser control board and the outputs are analog. 0.3v is off and 4.99 is full on. I'm going to use your drivers for all three colors. My red and blue modules are axis modules with heatsinks. The green module is a 200mw module from China. It's modulation input floats high so it can be used as a plug and play stand alone lazer. It turns out that the driver it came with had an issue with its modulation. It was malfunctioning. I would plug it into my lazer control board and it wouldn't modulate. I then purchased a couple drivers on ebay that function the same way. They work as stand alone drivers so when you power them up modulation is not needed to activate the laser. However these drivers were not powerful enough (only 630mah). My issue was I thought the reason these e-bay drivers turned on with no modulation plugged in is because it acted like ON=0 volts where my laser control board was doing the opposite, ON=5 volts. So now you can see why I thought there might be an issue using the flexmods. I thought my laser control board would tell it to turn ON when it's supposed to turn OFF and vice versa. But after testing the control board outputs I realized I was wrong and the flexmods will work fine.

  5. #65
    Join Date
    Jul 2009
    Location
    The Netherlands
    Posts
    1,458

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    @DrLava: sent you a PM about changing my order from 2 flexmods P3 to 4 if possible.
    Would be cool if it's possible !
    I didn't fail !
    I just found out 10,000 ways that didn't work.

  6. #66
    Join Date
    Aug 2010
    Location
    London or Spain depending on the weather
    Posts
    1,381

    Default

    [QUOTE=mspencer1;161471]Actually none of this will matter in the end.


    Are you going to leave it with no safety standby OFF switch other than the mains!

    Makes working on it or cleaning optics etc. slightly dodgy!

    Better to pull down internally and have an interlock defeat plug to pull it back up on the back of the projector IMHO.

    Unplug this and laser is OFF

    Cheers
    Last edited by catalanjo; 09-01-2010 at 02:05. Reason: no reason in particular

  7. #67
    Join Date
    Aug 2010
    Posts
    10

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    I'm going to install an interlock key on the back of the projector but I think there is a language going on here that I don't fully understand. Why would I have to install a pull down resistor when theres a safety interlock? Does the pull down resistor just keep the modulation input on the flexmod from floating high?

  8. #68
    Join Date
    Oct 2006
    Location
    Cleveland, Ohio
    Posts
    2,334

    Default

    Quote Originally Posted by mspencer1 View Post
    I'm going to install an interlock key on the back of the projector but I think there is a language going on here that I don't fully understand. Why would I have to install a pull down resistor when theres a safety interlock? Does the pull down resistor just keep the modulation input on the flexmod from floating high?
    No, the flexmod does not need pull-downs. Maybe he's thinking of the chinese driver?

  9. #69
    Join Date
    Aug 2010
    Posts
    10

    Smile

    Quote Originally Posted by drlava View Post
    No, the flexmod does not need pull-downs. Maybe he's thinking of the chinese driver?
    That would make sense.

  10. #70
    Join Date
    Aug 2010
    Location
    London or Spain depending on the weather
    Posts
    1,381

    Default

    Quote Originally Posted by mspencer1 View Post
    The green module is a 200mw module from China. It's modulation input floats high so it can be used as a plug and play stand alone lazer.
    Correct !

    Cheers

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