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Thread: Stan_Ham diode driver (analog)

  1. #1
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    Default Stan_Ham diode driver (analog)

    After showing my first projector on the forum i got several PM about the analog drivers i used.
    http://www.photonlexicon.com/forums/...ead.php?t=6473

    Some time ago i was looking for a simple driver for analog modulation of cheap opencan reds and bleurays.
    Rob stanwax emailed me with a driverschematic of his dualdriver he was using in his small projector.
    with some help of Rob (Laserwave.co.uk) i modified the driver and made a single anolog board out of it.

    We know its nice when people help each other.
    So here's the schematic and PCB for you all to expiriment with.

    Enjoy!!

    DO NOT SELL THESE COMMERCIALLY..

    special thanx to www.laserwave.co.uk

    The 300 Dpi files are in the downloadable zipfile.
    http://www.hamond.nl/images/plaatjes...HAM_driver.zip

    photo's are for showing only.








    Partlist

    Part Value
    C1 100nf
    C2 100uf
    D1 1N4148
    D2 1N4148
    D3 1N4148
    IC1 LM358N
    IDLE 10K RTRIM64W resistor
    LED1 power LED3MM led
    MAIN 10K RTRIM64W resistor
    R3 10K
    R4 10K
    R5 10K
    R6 10K
    R7 1K
    R8 10K
    R9 1R
    R10 10K
    R11 10K
    R16 calculate for diode type
    T1 BD437

  2. #2
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    Default

    Anthony I love the name! Stan_Ham is mega!!!

    Rob
    If you need to ask the question 'whats so good about a laser' - you won't understand the answer.
    -----------------------------------------------------------------------------------------------
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    Stanwax Laser is a Corporate Member of Ilda

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  3. #3
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    Kickass, y'all.

    This is *exactly* what i've been looking for.

    Thanks again

  4. #4
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    Default

    Could you by any chance post the board for the dual driver setup? As I'd be looking to buy/build two of the dual driver setups for some blu and red diodes.

    Excuse my ignorance on this, but am I right in thinking these replace the current sources for the drivers of the diodes, and swap them directly with this circuit?

    Also, am I right in thinking the diode would connect in the top right (at least for the single diode version), the +/- 6V on the left, and a connection to the FB3 on the SINGLEMOD point?
    What do the Monitor points do? And what do the pots do?

    Is this basically like the LavaDrive1 circuit? (or whatever it's called!)

    Rob, do you have any of the dual diode boards, blank or completed PCB's made up to buy? No worries if not, I'll route one out myself, but it would save me a few hours.

    Cheers,
    Dan

  5. #5
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    Thanks!
    Support your local Janitor- not solicited .

    Laser (the acronym derived from Light Amplification by Stimulated Emissions of Radiation) is a spectacular manifestation of this process. It is a source which emits a kind of light of unrivaled purity and intensity not found in any of the previously known sources of radiation. - Lasers & Non-Linear Optics, B.B. Laud.

  6. #6
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    Dan

    Yes they will work exactly as you suggest. The monitor points are so you can see the diode current and... well.... monitor it With a 1R resitor the volts (or more accurately millivots) acrsoo the resitor will indicate the mA through the diode. The pots are for threshold and max diode current so you set the driver to keep the diode current dribbling just on the point of lasing. Then as the input increases you have maximum range between 0 and 5v on the modulation. The limitation of the board is based on the output transitor (in combination with the monitor resistor (R9) and the supply volts. I run this circuit in my RGB and the output transistor is a BC337 (good for 800mA) which is neatly in a to92 and does not need heatsinking for a single diode drive.
    Yes I will be able to sort you either a pcb or a complete built board of the dual driver - this is actually as it first went to Anthony, he just trimmed one circuit out.

    Rob

    PS sorry i missed you yesterday give me a try this aft I will have my phone with me today
    If you need to ask the question 'whats so good about a laser' - you won't understand the answer.
    -----------------------------------------------------------------------------------------------
    Laserists do it by the nanometre.

    Stanwax Laser is a Corporate Member of Ilda

    Stanwax Laser main distributor of First Contact in UK - like us on Facebook http://www.facebook.com/FirstContactPolymerCleaner
    www.photoniccleaning.co.uk

  7. #7
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    Quote Originally Posted by stanwax View Post
    Yes I will be able to sort you either a pcb or a complete built board of the dual driver - this is actually as it first went to Anthony, he just trimmed one circuit out.
    I have replaced the BC337 for a BD437 that could be cooled better with a heatsink because i wanted te run a 500 mW 808 pump diode.
    The bleuray diode at 60mw doesn't even get warm :-)
    I added some small things and use different pots

    The dual driver from Rob is a nice small board.. good layout and works great.. just watch his youtube videos.


    my first TEST board without powerled and with the bc337.
    different PCB routing.

  8. #8
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    mixedgas is online now Creaky Old Award Winning Bastard Technologist
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    eh, just one question. Where is the soft start?

    Steve Roberts

  9. #9
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    Quote Originally Posted by mixedgas View Post
    eh, just one question. Where is the soft start?

    Steve Roberts

    There is NON...
    not everybody has the knowlegde like you....
    feel free to improve the schematic and board.

    its a PL project.
    But keep in mind that is has to be obtainable for evrybody (no SMD and exotic EU or USA electronics)
    Someone with basic electronics skills must be able to make te board.
    Maybe in the future put in a lasorb.

    there is no simple non SMD analog driver ("freeware") available yet.

  10. #10
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    Talking

    Ahh, nice, so there is no requirement for me to be able to build one...
    Love, peace, and grease,

    allthat... aka: aaron@pangolin

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