Results 1 to 4 of 4

Thread: Driver question

  1. #1
    Join Date
    Dec 2007
    Location
    NorCal / Western Caribbean
    Posts
    710

    Default Driver question

    Hi guys.

    Just got my new blue diodes but haven't got a driver yet. I'm waiting for the flexmods to come available again. I'm going to try and build a stanham driver in the meantime once the components arrive. Does anyone have a photo of this made on stripboard??

    Whilst waiting I want to get one of these diodes running. I've got an old red diode with ttl driver kicking around. Could I just replace the red diode with the blue one?? The ttl driver is mains powered. I'll turn down the output current before connecting the blue and then slowly ramp up the output. Can I do this with the power on? Would this idea work to get me some coherent blue?

    Cheers
    Rich

  2. #2
    Join Date
    Jan 2007
    Location
    Sheepsville, Wales, UK
    Posts
    3,372

    Default

    Rich
    It may work it depends on the power supply voltage on the low DC side of the PSU. If it converts mains into 5v you may get a glimmer of blue but its likley not to have enough volts available.
    See if you can identify the low ohm series resistor in the didoe circuit. If this is say 1 ohm then even at 300mA (200mA is the threshold of the blue) that res will be dropping 300mV add to this 0.7 V across the tranny and 4V across the diode and you will see you have used all 5v available. So it may work. If the driver has more than 5V avail then you should get some more power

    Rob
    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

  3. #3
    Join Date
    Dec 2007
    Location
    NorCal / Western Caribbean
    Posts
    710

    Default

    Thanks Rob.

    I'll give it a go and see what happens. I just didn't want the diode to pop.

    Cheers
    Rich

  4. #4
    Join Date
    Jan 2007
    Location
    Sheepsville, Wales, UK
    Posts
    3,372

    Default

    Quote Originally Posted by neutrino View Post
    I just didn't want the diode to pop.
    Not impossible but unlikely if the driver is designed for red
    Rob
    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

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •