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  1. pier1

    white led

    Hello AG              Do you mean the voltage across the led string when the mains voltage is disconnected and the led's are put off ?
  2. pier1

    white led

    So should i put a resistor across it to discharge it when it is put off ?
  3. pier1

    white led

    I fixed them with good ones, but the capacitors are still charged even after the led's are off . They give small shocks . I took the pcb in my hand after the led's were off, thinking they would be discharged .
  4. pier1

    white led

    While testing the board (old project with 52 led's) i applied just about +50 volts and found all the LED's start to work with a very dim light but around 4 of them were very very dim than the other 48 ones which were uniform in brightness. Is this because of the forward voltage rating or will...
  5. pier1

    white led

    Hi AG         Which manufacturer would be your next choice ?
  6. pier1

    white led

    In one of their page (pdf) i found white with the part number : 'MV8W0O' http://www.fairchildsemi.com/collateral/psg04_opto.pdf#page=28
  7. pier1

    Thevenin's Theorem

    Hi Zeppelin                 Thanks a lot. I never took the resistance into calculation. I just divided the voltages and went on till the last 2k resistor. The correct value is 9 volts. 
  8. pier1

    white led

    Hello AG             What was the part number you gave ?
  9. pier1

    National Stereo Radio Cassette Corder Repair guide.

    People can try to make out the model number of ur stereo if u can post the picture of it . 
  10. pier1

    white led

    will i be able to get LED's which are similar to each other, i mean from big branded manufacturers ? something like led's from a batch ?
  11. pier1

    Thevenin's Theorem

    hi Zeppelin                  According to the voltage divider concept ( i used the software "resistor calculator" on the site ) and found it to be 16volts at the last 2k resistor. Am i right ? i'm not so sure!!
  12. pier1

    white led

    Do you have the part number to order for the led's made by fairchild . What price you bought it for ?
  13. pier1

    Thevenin's Theorem

    Hello        I've been reading the book of malvino ( electronic principles ) 3rd edition . I have a doubt and its eating up my head . Please help me to go further . Here is what it says THEVENIN
  14. pier1

    white led

    No AG, its a chineese make.
  15. pier1

    white led

    Hi AG         In my previous LED project 2 LED's blew off from in between the string , I think that the quality of the LED is poor . What do u think ? . I just replaced them .
  16. pier1

    white led

    How much could this voltage be ?
  17. pier1

    white led

    Hi AG         Should I use any protection for the transformer from AC mains voltage fluctuations or will that effect the circuit ?
  18. pier1

    white led

    Hello AG,               Thanks for advice . I'll screw it up with some space in between (using lingthier screws). What wire shall i use for the led(+&-) I have used one now with 7 strands and 0.2mmthickness for each strand (here we call it 7.2 wire) . 
  19. pier1

    parallel port not working

    Hi   Its working at my friends place .
  20. pier1

    white led

    I spelled it wrong . It was hylam instead of hylem . Here is a pic of switches and a socket fixed on a hylam board .
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