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  1. pharaon

    how to determine the right voltage for led lamp?

    how can i determine the right voltage that could light up some leds in old lamp because it's own adapter is missing is it related to the number of the leds in it or what it's a rounded lamp and the leds like a string around it when i test it on the diode mode with my multimeter i find out that...
  2. pharaon

    dim LCD laptop screen

    i have picture but no back light , like the brightness of the screen is set to 1 or 0 i upload the picture i found 3 capacitors that both sides are shorted to ground ...when i removed from the board i test it and it was working fine giving me 4+ for capacitors measure...but it's place on the...
  3. pharaon

    need help to find alternative IC

    i have this IC for my car phone charger "XL 1509" which i can't find a replacement part for it so i wonder if anything can be as alternative for it
  4. pharaon

    Replace old transformer with rectifier bridge

    i have this pc speaker with failure Transformer that i want to fix so how about replacing the Transformer with rectifier bridge that give me 12V DC is it possible and if it's what piece should i use
  5. pharaon

    Is it possible to fix old PC monitor

    i want to know if it's possible to fix this old PC monitor [/url] [/url] [/url] [/url] [/url] [/url] [/url]
  6. pharaon

    Output voltage is higher than it should be

    it's the power board for satellite receiver the out put is higher than it should be like for the 23V it out 37V and the 5V out is 7V and the 12V is 18V so which part is responsible for this high voltage output i replaced the big brown capacitor which is 560V before the one beside the 8 legs IC...
  7. pharaon

    Phone's car charger

    This is my phone's car charger recently it charge the phone for 5 minutes then start to flicking charge / not charge I tried the same cable on other charger and working fine I hope to know what part of it causes that problem I disconnect the two capacitors and test it and it gave the right...
  8. pharaon

    Hp laptop adapter fail

    What is causing the noise in the video and how to fix Suddenly the lap stop working and i get that noise the adapter didn't make output dc to run the laptop After I disassemble it and recorded the video i was checking it and i tried to plug it again to the electricity the noise stopped but...
  9. pharaon

    Fix Satellite Dish Positioner

    the position-er work but give me error if i try to move the dish right or left what could be the problem here's some pictures
  10. pharaon

    How To Make Sure This Led Is Working

    how can i test if this led is working and what is it's right voltage [Mod Note: Resized oversized images]
  11. pharaon

    Boost Car Radio Signal

    is there any circuit that can boost the car radio signal?
  12. pharaon

    Need to know about this part

    What is the output of it0092b Because it need to be replaced
  13. pharaon

    Basic adapter no output

    The diodes are fine not shorted But no output What could be the reason
  14. pharaon

    help repair router..no respond for power

    no respond for power the front led dos not light at all...i tried to re-solder those tow blue capacitors in hope it will work but nothing..hope you can guide me to find out the issue and fix it
  15. pharaon

    help repair router adapter

    the one i suspect is 5.6 uf 400 v
  16. pharaon

    help fixing netgear switching adapter

    the electricity went off suddenly and since then the router keep rebooting the output volt now is : 13:90 current 5.2 i think it should be 1 A any one have an idea how to fix
  17. pharaon

    help in fixing national panasonic stereo model RX - F80 - 2

    i wish to run it at least as radio but i guess the power wire are connected to the wrong spot hope some one can guide me to the right place for the power wire connection spot
  18. pharaon

    Help in making LED lamp

    is there any tutorial on how to make Led lamp work on 250 V without adapter like in this video
  19. pharaon

    capacitors instead of rechargeable batteries

    is it possible to use capacitors instead of rechargeable batteries ? if so then how can it be done
  20. pharaon

    FM modulator light only and no transmitting

    my car mp3 FM modulator was working fine this morning and suddenly it stop transmitting frequency and just give me light screen.. wonder if any one can help me about the item that cause that failure in the circuit. here's is some pictures of the modulator circuit.
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