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Recent content by Er.abdulrehman

  1. E

    [SOLVED] LM7805 voltage regulator

    use 7805 in your design
  2. E

    [SOLVED] Traffic light controller circuit help

    use monostable multivibrator for t=10sec, t=1.1RC t=10 assume R=10k therefor c=0.0009uc(take 0.001uc)
  3. E

    how to overcome loading effect in 89v51RD2??

    Hi everybody, I am controlling DC motor with opto-coupler, my opto-coupler gives correct output i.e. when ther is no obstacle the output is 0volt and when there is an obstacle in between then the output is 5volt. But as soon as i connect to the P1.1 of 89v51RD2 it sinks all the voltage and...
  4. E

    [SOLVED] How does the reset circuit of 8051 work?

    Re: [Moved] 8051 Reset operation https://www.google.co.in/url?sa=t&rct=j&q=role+of+capacitor+in+reset+circuit&source=web&cd=6&cad=rja&ved=0CEIQFjAF&url=http%3A%2F%2Fwww.siriusmicro.com%2Fprojects%2Fb1.pdf&ei=_2WOULywIoHQrQfntYHIDg&usg=AFQjCNHLmuM_fByZPtcJcdkMK_Aw0AbTPQ
  5. E

    Capturing digits from PORTB and send it to screen via UART

    What it is sending when you are pressing 88.
  6. E

    how to make a seven segment based count down timer for traffic signal using atmega 16

    You need to load the timer register first with the HEX value of your time count. Timer Count=1/((1/12)*Crystal Frequency)
  7. E

    how can a buzzer be used to alert a sound?

    Use comparator to check the password, if the password does not matches it will make AeqB pin low, now connect the NOT gate at AeqB pin and connect the output of NOT gate to the buzzer.
  8. E

    Symmetrical Components

    Will you elaborate so that your query get solved.
  9. E

    Voltage Mirror at 1.5v

    https://www.analog.com/en/precision-op-amps/precision-rail-to-rail-amplifiers/products/index.html
  10. E

    [SOLVED] problem about LED to glow in parallel

    R=(5-3.6)/20m R=70 ohms
  11. E

    About the Bitmap/Jpeg to pixel array converter software

    **broken link removed**
  12. E

    Interrupt help need with 8051!!!

    What exactly you want to do.
  13. E

    How to make Retina based Mouse Control.

    This link is about the product, i want how to implement it using Image Processing
  14. E

    How to make Retina based Mouse Control.

    Can any one suggest how to do this, Thanks in advance....
  15. E

    How to make "Enter,Delete,Move Right,Move Left" button using 8051.

    No, here query is not incomplete, Actually i made the code for keypad from 0-9 which is working properly, but i don't know how to perform these actions like Enter,Del...
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