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Recent content by shohaib1

  1. S

    List of Sonyericsson Text mode supported mobiles?

    Hi guys! I need a little help too. I want to know which cell models support SMS TEXT mode ? I know, lot of cell phones can operate in PDU mode, but I want to know the TEXT mode like t290 from Sony ericsson, Please List as much as possible, Because I am not sure, Whether I'll be able to get any...
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    help required in driving Bipolar stepper using uC in Proteus simulator,

    you provided a scematic of NPN's, but do i always have to use in Darlington form, can i not use as single form, not in darlington configuration?? ---------- Post added at 14:13 ---------- Previous post was at 14:09 ---------- and next i got a L298n IC, now any suggestions, from where should i...
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    help required in driving Bipolar stepper using uC in Proteus simulator,

    Do i always have to use a PNP transistor, with one NPN, can i not have both NPN's??? referring to the diagram provided........
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    help required in driving Bipolar stepper using uC in Proteus simulator,

    I have a motor with specs....... 5V, 18 degree, it is a small floppy drive motor. any suggesstions?? and thanks...........
  5. S

    help required in driving Bipolar stepper using uC in Proteus simulator,

    understood that very well, that's great....... @@@@@@@@ now that was the real problem, i had, after seeing the connections you made to motor, this came to my mind, and i composed a paint file to ask you the same thing , ( file is attached ), but now i had understood that.......... thank you...
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    help required in driving Bipolar stepper using uC in Proteus simulator,

    yes boss! it is tested and found working, really thankfull to you...... i have just 2 more questions, 1st is that, what might be the reason that my circuit was not working?? after i have changed the circuit just like your's except the addition of resistors(resistors not installed) ?? although...
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    help required in driving Bipolar stepper using uC in Proteus simulator,

    understood very well, ok, this means, i have to generate some small delay, like some hundred cycles..... thanks once again, i'll reply in 2 hrs, after i make and check the working.... thanks
  8. S

    help required in driving Bipolar stepper using uC in Proteus simulator,

    Sorry bro! I mistakenly wrote "Collector" in place of "Emitter". Please read my above post once again, as it is re-edited. ---------- Post added at 17:43 ---------- Previous post was at 17:39 ---------- I have already done that, but of no success........... Which version of Proteus are...
  9. S

    help required in driving Bipolar stepper using uC in Proteus simulator,

    Boss, i got your point of Current limiting resistors, and i had also a loook at your refered Links of H- bridges, but as above you have mentioned that " " but when i take my voltages of emitter lower than the BASE, still it won't work, I have also made the Motors operating voltage less, Still...
  10. S

    help required in driving Bipolar stepper using uC in Proteus simulator,

    Here is the attachment of the program in form of notepad file, and compiled HEX file (it is in compressed format).
  11. S

    help required in driving Bipolar stepper using uC in Proteus simulator,

    hi to all, help required in driving Bipolar stepper using uC in Proteus only, i am assigned to drive a bipolar stepper motor in proteus simulator, after reviewing much literature, i got to the point of designing, but still no success, as motor is not turning, the logic is working right,(as it is...
  12. S

    Help needed in driving Bipolar Stepper motor

    Thanks sir, i am cleared on the point, I have checked the motor by giving pulses to its coils in specific sequence and it works as desired, Now i just want to ask, which switching transistors should i use for switching in motor?? I want to use discrete components, no ICs, So please list me some...
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    Help needed in driving Bipolar Stepper motor

    what do u mean by Dual H-Bridge?? do u mean that there are 2 poles so we need one H- Bridge for each Pole?? i was started on thinking like this because 4 transistors were required for a single H-Bridge like: SEE the attached link........ Driving Bipolar Stepper Motors and if there are 2...
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    Help needed in driving Bipolar Stepper motor

    i am trying to drive bipolar stepper motor, i have got no special bipolar stepper motor driver IC, instead i m using a Power supply which can give current upto 1A, first of all, i found resistances between different terminals, which found to be... RED-------9.7 Ohm-----yellow orange----9.7...

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