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Recent content by khafaji

  1. K

    at89s53 program for lcd pc1602-d

    Where is your problem? in programmeig in software in lcd pins or...
  2. K

    Hosiden HLM 8227 LCD pinouts needed?

    see below link **broken link removed**
  3. K

    determine the power supply filter capacitor value

    I think it is better that you use an inducer in range of milli or micro in parallel with two caps. one of them in range of micro and the other in range of nano. this is to decrease the low and high frequency noises.
  4. K

    Looking for standard testbench for OpAmp

    opamp testbench In National Semi. App notes you can find very usefull documents about opamps
  5. K

    Questions on electronics?

    you can refer to Grey/Meyer Analog Integrated Circuits book .it is very good book.
  6. K

    Asynchronous state machine

    state machine asynchronous output forum Very good book in asyncronous design is: Digital Logic Circuit Analysis & Design by P.Nelson, H.Nagel ,D.Cerroll ,J.Irwin
  7. K

    What does the 5th resistor color band mean ?

    Resistor Colour Coding the 4 lines are 5 percent resistors and 5 lines are 1 and less persentage nice program is resistor color coder( Resistor CC) from schematica
  8. K

    Question about voltage difference in BJT differential amp

    Diff amp Yes it is beeter that use the same DC bias for good result. also you can use different bias points but this not recommended
  9. K

    Pinout of Data Vision PHICO D-0 94V-0 LCD

    phico lcd generally standard lcd has 16 pins pin1->GND pin2->VCC pin3->contrast(usually with potentiometer ) pin4->RS (RS=0 command reg RS=1 data reg) pin5->R/W(read write) pin6->Enable pin7-14 -> Data0-7 pin15 & 16 for backlight in some models
  10. K

    raltionship between frequency reponse and poles, zeros ???

    any first order pole give your freq response slope -20db/dec and any first order zero +20db/dec
  11. K

    Elementary digital projects (combinatorial and sequential)

    digital project you can try MAX Plus II in the altera website This is free & very nice program for digital design
  12. K

    The advantage of differential apmplifier mode?

    Because the nonlinearity of transistors you can see any harmonic of input in the response of single transistor amplifier but in the differential amplifier you see only odd harmonics and this mean increase in S/N ratio
  13. K

    What is a bandgap diode and how it differs from others?

    question: are you mean tunnel diode?
  14. K

    Looking for the freerisc8_11 document

    Freerisc8_11 Document What do you want exactly? Plz explain what are "freerisc8_11"
  15. K

    Learning microcontroller programing

    Try this site it has free books and evaloation boards **broken link removed**

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