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  1. S

    How do I solder SMD components with a regular iron

    First get the component correctly mounted then just solder without caring for shorts between pins. Finally remove the excess solder with desoldering wick. You have to fry a few components during initial ventures but once you get the hang of it nothing is simpler.
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    op system

    I use windows AND linux. I haven't heard abt basic though
  3. S

    Shift Registers

    Shift registers are good dividers too. google "shift register theory" this and read till you get tired
  4. S

    if invert a sound wave

    no effect! if you are passing it through an inverting amplifer with unity gain.
  5. S

    remote control

    This seems to be a good idea http://www.andrewkilpatrick.org/mind/ir_mixer/
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    urgent (counter question)

    In a synchronus counter, all flip-flops have same clock signal. Thus the outputs of all flipflops change at same time. However a asynchronus counter dosen't has a single clock going to all ff's thus creating glitches in the output. Although asynch counter can be built with vrey little glue...
  7. S

    how can do a good lab report ?

    Probably Date & Time ? ;D
  8. S

    electronics workbench

    Find a good carpenter & paster him with your needs ;D
  9. S

    ps/2 to rs-232(serial port)

    USB hardware is also specialised. It is not a simple UART. It must understand & react to various bus states. Comparing USB to RS232 is like comparing a moterbike to bicycle. ;D
  10. S

    help with monostable multivibrator

    AND each signal with output of 555 & then you can have the waveform you need.
  11. S

    Need a P-Channel FET subs.

    I figured that the JFET only shorts out MBus & Fbus Tx pins. I daresay you could replace it with 74HCT4066 quad analog switch or if you can find it (or sample it ;D) SN74AUC1G66 (Single Bilateral Analog Switch) from TI.
  12. S

    plane motors

    Servo motors are special ones. Check this out http://www.epanorama.net/documents/motor/rcservos.html
  13. S

    plz help.........I am new in thif field

    NEED MORE DATA ;D
  14. S

    ps/2 to rs-232(serial port)

    Unfortunately PS2 -> USB is not that simple. You shall need a USB 1 compilant microcontroller, impliment HID protocol, impliment PS2 protocol and interfase these protocols. It would be much easier to buy readymade converter. You can also search if a chip is available for this.
  15. S

    ps/2 to rs-232(serial port)

    Put a microcontroller in between them ;D
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    My computer is slowing down!!

    Yep & next step would be to use DOS for ultimate speed ;D And about the system restore, it will store the files on your harddisk in a hidden folder named "System Volume Information" on each drive eating up space. It will copy exe & dll files into that folder whenever ou try to install...
  17. S

    Adams Motor Project

    backemf = VCC - (I * DC Resistance of the Coil)
  18. S

    plane motors

    I hazard a guess that you are not refering to servo motors used in model planes but are refering to tiny DC motors used to propel simple battery operated toys. These are the basic DC motors with a permanant magnet to generate stator field. To speed up such motor you can increase voltage accross...
  19. S

    I want to learn to repair PC-monitor

    http://www.repairfaq.org/
  20. S

    Quick calculus question.

    What a wonderful proof :o d/dx(sin2x) = d/dx(sin2x) * d/dx(2x) = 2 * cos2x remember the chain rule for derivative ??? http://www.math.hmc.edu/calculus/tutorials/chainrule/ http://people.hofstra.edu/faculty/Stefan_Waner/RealWorld/trig/trig3.html
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