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Recent content by karthickb3e

  1. karthickb3e

    Photoelectric sensor fast switching circuit for Micro controller input

    Better to use the Opto-coupler as an isolator... through the Isolator u better to take the high to low transition at ur required voltage(3.3V)
  2. karthickb3e

    Ripple is 50hz or 60hz?

    Please refer your country supply frequency.. for example INDIA - Supply frequency is 50Hz... from that reference you conclude for frequency cakculation... SMPS means Switched Mode Power Supply... Search in Google for More Details
  3. karthickb3e

    Pspice problem..can someone help me...

    U put transistor as switch and simply on and off the transistor by controlling the base through PWM signal
  4. karthickb3e

    PCB Designing Interview Question

    Also asks about impedance matching,,, EMI and EMC guidelins in pcb's
  5. karthickb3e

    Sound noise in the driving circiut

    hi all,, In my driving circuit i use the capacitor across the circuit... the circuit is limited to 200mA to load... the switching frequency is 4khz.... i used the electrolatic capacitor of 22uF... which occupies more space.... the problem is when i replace the capacitor with eq. of 22uf...
  6. karthickb3e

    Best 31 website for online learning

    thanks for giving the resource to study....................
  7. karthickb3e

    MSP 430 Launchpad is not working?????

    sorry that launchpad is not connected to other msp... there has only one msp430 controller n that board
  8. karthickb3e

    MSP 430 Launchpad is not working?????

    i tried for other chip but it not works..... then how to rectify hardware problem on the JTAG interface
  9. karthickb3e

    MSP 430 Launchpad is not working?????

    Hi bmarshall651, In same CCS, works for other launchpad but still the problem launchpad not works,, please help to rectify the problem,,,
  10. karthickb3e

    Controller not power up during slowly varying the input voltage……

    is this can be done within software with out the other external hardware....
  11. karthickb3e

    Controller not power up during slowly varying the input voltage……

    sorry sky_123... i dont understand yoyr answer (e.g using a dedicated reset device, there are 3-pin ones available)
  12. karthickb3e

    Controller not power up during slowly varying the input voltage……

    Hi all, I am using MSP430G2152 controller for my project. I am using the 8MHz calibrated clock. At power up, the controller not works, but the voltage at supply pin and reset pin is at correct level. This problem occurs repeatedly while slowly varying (I am using variable power supply at input...
  13. karthickb3e

    Why i see edaboard.com in firefox with this skin

    i am also have experience in this kinds of problems... but it solved after restart firefox ,, some times it solved by reloading the page
  14. karthickb3e

    what this? and what is the use of it!

    thank you chuckey.. to know the technology of reducing EMI using ferrite beads

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