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  1. only_lonely

    Re: power surge kill power supply/motherboard

    the power supply comes with overvoltage protection, why it is still havin AC noise?
  2. only_lonely

    freq VS voltage

    what is the relationship between freq and V? does the freq really play a big role in power supply/electronics board. I got a lab test that require me to use a module to adjust the freq form 40 to 70 Hz, then observe the board (on /off). But i found that the board still can power on when i tune...
  3. only_lonely

    power sequence question

    need to conduct DC margin test using Agilent MAINFRAME ( have +5V,+3.3V,+12V,-12V,Power GD,+24V modules). then take out the power supply from my motherboard, connnect those modules to my board ,simulate the power supply condition. But the staff told me to calculate or figure the time for those...
  4. only_lonely

    dual switching power supply question

    I have a motherboard, it can power up by 5V. But i found it the only way i can power it and boot into windows is using parallel mode (master must in CV,slave in CC).If i want to see the current flow, then i need to sum the readings from master and slave. If i use indepent mode (Master:CV) to...
  5. only_lonely

    12/24V cash drawer?

    I saw the spec of my cash drawer. Is 12/24 selectable port. Whats the difference between 12V and 24V? How do I switch it? and test out it? PS: Sorry if i ask a noob question.
  6. only_lonely

    need books for testing job

    Anyone here work as test engineer in computer/related area? Any website / books recommend to do testing job? As i am noob and newbie, need some guidelines. thanks.
  7. only_lonely

    How to use oscilloscope to analysis the audio signal

    I have no idea on the audio test by using oscilloscope. Example: I play a music, and i use volume control to adjust the left and right volume. (Windows Audio/Sounds Properties) How to use the scope to verify whether the volume that i adjust is accurate. Anybody here, Pls help me. Thanks a lots.
  8. only_lonely

    line in?line out?

    I am doing testing job currently. While i looking at specs, quite confuse witht he word"line in" and "line out" port. May somebody here briefly explain to me. Thanks a lots!
  9. only_lonely

    LVDS and backlight cables.

    Does anyone here experienced make their own LVDS and backlight cables for LCD panel? I want to reconfigure my LVDS cable output because the connector is not campatible with my motherboard. What i should do? I have the datasheet for the panel and my motherboard LVDS pin out interface.
  10. only_lonely

    no clean and clean manufacturing process

    Can somebody briefly explain whats diff betwwen no clean and clean manufacturing process? Thks alots.
  11. only_lonely

    THE value in the circuitry

    i got a circuitry. each resistor n cap have a value. but i don't what they  mean for example 30k/6/1  what is the 6 n 1 represent? 1u/8/10v what is the 8 represent? can someone help me? THANKS
  12. only_lonely

    anyone know this part no.?

    hello, i have a regulator on my motherboard with part number K3918 KS 58. i want to know the component manufacture n get the datasheet...but i cant...i search whole day still cant get it... anyone know it?can u help me thanks
  13. only_lonely

    eagle drawing(SOIC to DIL socket 8pins)

    i use eagle to draw my schematic(SOIC to DIL socket 8pins) the chip holder now i have is a normal 8pins holder...for the ic chip(74xx). i want to do like this i create a schematic..edit>add>atmel>attiny15L>then i add another one IC package DIL-8(i don't wats different between DIL8...
  14. only_lonely

    8pins IC holder datasheet

    i need a 8pins IC holder datasheet for my project i need it for my CADCAM drawing.i want to create a SOIC to DIL socket for my microcontroller chip atTINY15L(8pins). the image below is 16pins. anyboby can help me?THANKS>>>
  15. only_lonely

    how to calculate??

    111.GIF i want to replace the 4.5v supply with 12v...am i need to change the value of the resistor and capacitor????how to calculate the value???
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