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  1. fatoota

    -2mV ~ 2mV signal

    hello tercio, i really wonder, your supply is 9v and the signal goes below zero, how to use op-amp in amplification, you need volatge divicer in series with your input to shift the negative voltage over the x-axis and make it postive, will this suite you project, to have a whole postive...
  2. fatoota

    power supply -5 V

    lukas, you must be sure of your input voltage, your connections should be correct from the first time, i mean if you reversed 2 and 3 and then discoverd your mistake, the ic may be burnt out and you will use it defected in the next time. note that the input max voltage is -7 and input min...
  3. fatoota

    i need a datasheet for GD 74LS174......

    ante, thanks very much for your help, i will not forget this for you but the last one is not available with me now so i will send again when i get it. FATOOTA
  4. fatoota

    i need a datasheet for GD 74LS174......

    hello if you can help me find these datasheets i will be very happy and thankful for this great community, i will write what i found on the ic which i do not know its kind at all GS 9428 GD 74LS174 the second is GS 9342 GD 74LS244 the third is GS GL 7805 N50 and the last is s130 N73 CR6 and...
  5. fatoota

    matrix point(microcontroler programming)

    i will tell you the story i was asked to exchange the seven segment display of the building lift with a dot matrix display, i bought a similar circuit that is sold in shops, it contains a microcontroler with this number Z8663016psc i want to make this circuit at my workshop with mass production...
  6. fatoota

    matrix point(microcontroler programming)

    hello everybody i have a seven segment display and i want to replace it with point matrix which has more capabilities than the ordinary seven segment, i know that it needs some programmed ic's i think it needs microcontroller, and i know it is a big project that need some devices connected to...
  7. fatoota

    what is silk screen??

    hi i want somebody to explain silk screen and if there is any ability to build pcb's using silk screen in home plz help me ???
  8. fatoota

    what is micro switch

    hi could anyone explain to me what is microswitch?? FATOOTA
  9. fatoota

    connect four

    hello everybody i was sitting on my bed when i thougt about a connect four, the game all of us know and play i thuoght we can convert it into an electronic circuit with a few leds and buttons and some flipflops couters ...etc i think i will be perfect with some sound effects the proplem i did...
  10. fatoota

    can you help me

    hullo, everybody i seek for help, i want to save money and make a car alarm for my car, if you can link me to such a project i will be thankful. fatoota
  11. fatoota

    what about online chat in sepcific subjests

    with the name of allah i just have an idea that may be useful an it is as follows 1-advertise for a questionair about four to five subjects to be disscused 2-take the subject that gother the most votes 3-advertise for the time and how to connect to online chat and disscus that subject with...
  12. fatoota

    datasheet for LA4440

    with the name of allah i sent an e-mail to sanyo asking them for the datasheet they replayed that they discountinued it and can not provide any more information about it. thanks mp and i am thankful for your efforts to us and your helpful advices this is really a a nice community.
  13. fatoota

    Build a simple PC oscilloscope

    with the name of allah i found this link that may be useful http://www.ee.washington.edu/conselec/CE/sp95reports/guterman/final/scope1.htm#hard :)sherief-egypt
  14. fatoota

    Build a simple PC oscilloscope

    hi i just have an idea about what you said of +5 volt as a maximam i/p. i think you can not give the pc souncard very high voltage or it will burn, so you have to use attenuators, not neccessarily a voltage divider and you may enter the attenuation level as a data to your software. that is...
  15. fatoota

    datasheet for LA4440

    hello ::)i searched everywhere for la4440 datasheet but i found only the test circuit for it, please if you can supply me with the full datasheet i will be very thankful, i want to use it as a 2 channel car amp. if you have any advice for me please tell it to me. thanks for all ;D
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