Answer / arun cs

U can drive a DC Motor with the help of a micor controller
(eg:PIC16f877).With the help of
PWM(Pulse Width Modulated Signal)from an Micro
controller.The PWM signal will fed to a H-Bridge(Consist of
4 Darling Pair transistor pairs) which will drive the DC
motor.The frequency of PWM is directly proprtional to speed

Answer / c.kumaresan

The programmable peripheral interfacing(PPI)devices are
used to interact the "Motor Assembly Unit" 8085
Microprocessor.

Define latching current?

0 Answers  

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HI IN A MICROWAVE HOP THERE IS A SITE EXAMPLE(A &B).......IN A SIDE I AM GETTING RECEIVING LEVEL 45 AND B SIDE I AM GETTING 55 ...WHAT WIL BE THE PROBLEM..... SUCH QUESTION ASK FROM HUAWEI........THEY TOLD NO RADIO PROBLEM,NO LOS,NO FEEDON PROBLEM.I NEED A EXACT ANSWER......

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what is difference between voltage & current?

4 Answers  

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Consider sinc(x):where sinc(x)=sin (xpi)/xpi. and sinc(x) have max value i.e. unity at x=0 .now if x=0.then pix =0 and sin (pix)=0 at x=0. then above expression sin (xpi)/xpi.should be of 0/0 form i.e. in-determined form. then how sinc(x) is one at x=0. pi is constant.

1 Answers  

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please tell me wat types of technical questions will be asked in Alcatel lucent. and suggest me which site to view

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What amplifier

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Define what happens to the conductivity of semiconductor with the rise in temperature? Compare with the conductivity of metals.

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What about the year gap criteria for HCL technology?

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What is meant by voltage commutation?

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What precautions are required to be observed in the use of leds?

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What is Authentication? Why do we need it? Name the algorithm(s) used in it?

1 Answers  

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what is your strength?

14 Answers   CPCL, Salalah Methanol Company,

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