I've acquired some luxeon LEDs - they are tiny - on a 3 x 4mm PCB...
http://www.luxeonstar.com/Luxeon-Rebel-LEDs-s/1.htm
... and run on 700 mA. The tiny board has 2 solder pads and another for a heat dissipation.
Has anyone used these? I have no idea how hot they would get if run continuously, anthough I intend to run them flashing at about 0.5 - 1 Hz as a model helicopter tail beacon. I can make the "on" flash as short as I like in which case the heat output is minimised, but I'd like to have a rule of thumb starting point. In the absence of advice to the contrary I'll stick the heat pad to a copper strip about 3 x 25mm with heat resistant epoxy (JB wWeld).
Nelson
http://www.luxeonstar.com/Luxeon-Rebel-LEDs-s/1.htm
... and run on 700 mA. The tiny board has 2 solder pads and another for a heat dissipation.
Has anyone used these? I have no idea how hot they would get if run continuously, anthough I intend to run them flashing at about 0.5 - 1 Hz as a model helicopter tail beacon. I can make the "on" flash as short as I like in which case the heat output is minimised, but I'd like to have a rule of thumb starting point. In the absence of advice to the contrary I'll stick the heat pad to a copper strip about 3 x 25mm with heat resistant epoxy (JB wWeld).
Nelson