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Recent content by zohaib

  1. Z

    Serial Port and Visual C# question

    thanx to reply, yes you get it right, it is like 4pins of the port will be totally unrelated to other 4 pins of that port.
  2. Z

    Serial Port and Visual C# question

    Hello forum, I m building an interface on Visual C# to send data to microcontroller to rotate stepper motor on different angles. Currently i m sending different characters one byte at a time to microcontroller. Microcontroller receiving the ascii code of that character and rotating the motor...
  3. Z

    Bipolar Stepper motor driver

    Thanks FvM, I think i need some more theory work to do, will get back to you soon, thanks for support.
  4. Z

    Bipolar Stepper motor driver

    thanks pervez, it means i can't obtain bipolar mechanism with connecting both center tap wires?
  5. Z

    Bipolar Stepper motor driver

    some one told me if i reverse the switching i can get reverse rotation as well.. anyway can i use TIP120 as it also has built in back emf protection...
  6. Z

    Bipolar Stepper motor driver

    Thanks FvM, Basically Motor has 6 wires where two center tap wires of the coils are connected to 5V and remaining 4 wires are grounded (For testing) one by one to move motor one step . Now i have to ground these wires through some driver circuitry which can accept more than 0.8 Ampere and can...
  7. Z

    Bipolar Stepper motor driver

    Hello forum How can i drive my bipolar stepper motor (6 wires, 3.2Volt, 0.8 Ampere) using uln2003, Maximum output current for uln2003 is 600mA. Please Help Thanks.
  8. Z

    source of income being an electronics professional job

    source of income hello forum! what is the source of your income being an electronics professional job or own business?
  9. Z

    8051 assembly question, 16 bit division asm for 80c51

    16 bit division asm for 80c51 hello forum! i want to convert the data i am getting from adc ic into voltage .if the data reaches ff it means we have 5v and so on.so the formula should be (adc_data*5)/ff how to write the code in assembly i can do it in c and bascom but i need to do it in...
  10. Z

    What's the current needed for 8x8 LED matrix display?

    hello forum ! i have bought an led matrix 8x8 display but couldn't find its datasheet how much current should be supplied to it i tested few leds by supplying 5v through 220ohm resistor they have enough brightness.according to this arrangement i am supplying 22mA to led is it ok ?or what should...
  11. Z

    circuit repairing and troubleshooting

    hello forum! i am in avr programming and do it well but i am not a master in circuits repairing and trouble shooting please inform me about a good link thanks
  12. Z

    How can I tinplate my PCB ?

    hello forum! how can i tinplate my pcb please help thanks
  13. Z

    Questions about voltage in lead acid battery

    hello everyone! i am developing a ups(inverter) i am confuse what should be the battery voltages to cut it off from the load and what should be fully charged voltage please help me thanks
  14. Z

    How to sense overload using ADC on a UPS?

    hello everyone! how can i sense overload using adc on my ups i know how to read using adc but i dont know how to make the circuit to sense overload thanks
  15. Z

    Back emf protection for a FET

    hello every one! i am designing a ups(inverter) i want to protect FET from back emf what should be the circuit also i want to know how much fets should be connected according to load (how much current one fet can pass through it) thanks
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