Making a small high power LED array - best way to drive them?

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • xredhawk
    Senior Member
    • Jul 2011
    • 103

    #21
    Re: Making a small high power LED array - best way to drive them?

    would like to see pics of aquarium when finished

    Comment

    • mcfly666
      Senior Member
      • Oct 2013
      • 71
      • uk

      #22
      Re: Making a small high power LED array - best way to drive them?

      OK, so I'm going to knock the step up boost converter on the head. Would be fine for lower power leds but its just not suitable. might get one though as they seem handy as a small bench psu type thing.

      Going to go for an off the shelf driver, and I will run three - one for each led. Finding a driver with enough volts was difficult!

      Anyway the specs are:

      input Voltage: AC85V-265V
      Output Voltage: 27-30V (10W)/30-36V (20W/30W/50W)
      Input Current: 0.2-10A
      Output Current: 300mA/600mA/900mA/1.5A

      Only thing that troubles me is the outputs = the 10w module only outputs upto 30v to get the rated 32/34v that the leds need I would have to get the 20w version of the driver. Could be that the Chinese specs are not worth the paper their written on and I would have to suck it and see if 30v will drive an led.

      Next the current, I'm presuming that the 300mA/600mA/900mA/1.5A is 'smart' and it will adjust itself as needed? I dont mind underdriving the LED a little as it should be easier to manage the thermals and should prolong life.

      Sounds like a plan?

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #23
        Re: Making a small high power LED array - best way to drive them?

        The 30V will drive the LEDs but no where near as bright as full power.

        If it is a constant-current converter then it will work.

        I would be very wary of a cheap AC power supply from China for safety reasons, they can be dangerous, so be careful.
        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

        Comment

        • mariushm
          Badcaps Legend
          • May 2011
          • 3799

          #24
          Re: Making a small high power LED array - best way to drive them?

          No, it's very unlikely to be "smart". Most likely you'll have to select with a switch, or it's fixed current and they sell several versions of that power supply.

          Comment

          • mcfly666
            Senior Member
            • Oct 2013
            • 71
            • uk

            #25
            Re: Making a small high power LED array - best way to drive them?

            OK guys, the LED's came today and I've been having a little play with them. Like them so much I'm going to get the 12v versions so they are easier to drive.

            Only problem really - apart from they need loads of juice, is that there so small. The die is only 2cm square. Packed into that is a matrix of 3X3 LED's, cooling them down is problematic...

            Got a small vid to show you guys, bear in mind this is only two LED's done Mguyver style. The lights are near the center of the tank and they are being driven by a bodged PC PSU running through a voltage/current regulated 600w boost converter in parallel @30v - 6.9ma Will get nicer when I sort the little things out!

            http://s1163.photobucket.com/user/lo...9a27d.mp4.html

            They look nicer in the flesh ( my phone sucks)

            Anyway, would using thermal epoxy be a more efficient heat transferer than your bog standard TIM?
            Last edited by mcfly666; 03-11-2014, 05:23 PM.

            Comment

            Related Topics

            Collapse

            • Document Archive
              HP 280 G2 Small Form Factor PC i3-6100 Specification for Upgrade or Repair
              by Document Archive
              This specification for the HP 280 G2 Small Form Factor PC can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the 280 G2 Small Form Factor PC boardview and 280 G2 Small Form Factor PC schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification,...
              09-12-2024, 03:44 PM
            • Document Archive
              HP ProDesk ProDesk 600 G2 Small Form Factor PC ProDesk 600 i5-6500 Specification for Upgrade or Repair
              by Document Archive
              This specification for the HP ProDesk ProDesk 600 G2 Small Form Factor PC can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the ProDesk ProDesk 600 G2 Small Form Factor PC boardview and ProDesk ProDesk 600 G2 Small Form Factor PC schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please...
              09-12-2024, 03:36 PM
            • Document Archive
              HP ProDesk ProDesk 600 G2 Small Form Factor PC ProDesk 600 i5-6500 Specification for Upgrade or Repair
              by Document Archive
              This specification for the HP ProDesk ProDesk 600 G2 Small Form Factor PC can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the ProDesk ProDesk 600 G2 Small Form Factor PC boardview and ProDesk ProDesk 600 G2 Small Form Factor PC schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please...
              09-12-2024, 03:36 PM
            • Document Archive
              HP ProDesk ProDesk 600 G3 Small Form Factor PC (ENERGY STAR) ProDesk 600 i3-6100 Specification for Upgrade or Repair
              by Document Archive
              This specification for the HP ProDesk ProDesk 600 G3 Small Form Factor PC (ENERGY STAR) can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the ProDesk ProDesk 600 G3 Small Form Factor PC (ENERGY STAR) boardview and ProDesk ProDesk 600 G3 Small Form Factor PC (ENERGY STAR) schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly...
              09-12-2024, 02:00 PM
            • Document Archive
              HP EliteDesk EliteDesk 800 G2 Small Form Factor PC EliteDesk 800 i7-6700 Specification for Upgrade or Repair
              by Document Archive
              This specification for the HP EliteDesk EliteDesk 800 G2 Small Form Factor PC can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the EliteDesk EliteDesk 800 G2 Small Form Factor PC boardview and EliteDesk EliteDesk 800 G2 Small Form Factor PC schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum....
              09-12-2024, 03:44 PM
            • Loading...
            • No more items.
            Working...