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  1. R

    Brightest 5mm @ .5 watt 80 degrees

    Sorry if this is the wrong place to post, but Ive just taken delivery of some 5 mm .5 watt LEDs from http://www.led-tech.de/ . They are very powerful leds considering they are 5mm non SMDs. Rated as below. Also available in white. I've not seen these kind of specs elsewhere, but let me know...
  2. R

    Energy loss and efficiency

    Having experimented a lot with LEDs for home lighting, Ive concluded that often more energy is lost in stepping down voltage and current than actually lighting the LEDs. Both resistor and constant current circuits have to 'dissipate power' in order not to overdrive the LEDs. Worst case...
  3. R

    Getting parts for LED driver in UK

    I want to build a driver circuit from Instructables But cant find a supplier of the Fairchild 2N5088BU or Fairchild FQP50N06L anywhere in the UK! Only datasheets come back from a Google search. Can anyone recommend an alternative that's available in UK or know a supplier. PS. purchasing from...
  4. R

    LED Voltage and current question

    According to the above circuit I need about 6 volts input to run a luxeon star LED. As I understand it, the regulator takes about 3v leaving 3v for the LED and the constant current regulator will will provide a fixed current of 320ma which is just fine. My question is, can I use a higher...

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