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Recent content by moonnightingale

  1. M

    Plz explain me behaviour of Speaker

    Yes i am also amazed why it gave sound when it was put in series has anybody experienced it anytime
  2. M

    Plz explain me behaviour of Speaker

    The speaker is 8 ohm and i adjusted the value of L and C in such a way that impedance was close to 8 Even then this strange thing happened
  3. M

    Plz explain me behaviour of Speaker

    I was trying to listen the sound on speaker after LC circuit. the impedance was also matched but when i connected the speaker in standard configuration, i did not hear any sound at that time pic is attached When i connected the speaker in series between L and C, it gave sound How it is...
  4. M

    How to calculate impedance of RC circuit

    My RC circuit is atatched kindly tell me how to calculate its impedance Thanks a lot
  5. M

    How to boost signal voltage level to make it audible

    I used this site http://circuitcalculator.com/lcfilter.htm and adjusted L and C in such a way that impedance comes to be around 8 and freq also remain in my desired range my L= 2.5 mH C= 70 uF
  6. M

    How to boost signal voltage level to make it audible

    Now i have matched the impedance will i be able to listen 1.8 V Peak to Peak sine wave on 8 Ohm 1/4 Watt Speaker
  7. M

    How to boost signal voltage level to make it audible

    Yes LM386 is an ideal but i am working in Pspice Lm386 is not in library of Pspice What can be other option
  8. M

    How to boost signal voltage level to make it audible

    Can some transistor or Op Amp can do this
  9. M

    How to boost signal voltage level to make it audible

    I am having a signal of 240 mvolts Peak to peak and freq of that sine wave is around 300 Hz I want to amplify this signal so that it can be heard on 8 Ohm 1/4 watt speaker Kindly tell me the circuitary to boost it Thanks
  10. M

    Need Help for Proteus and LC Circuit

    I was forced to use these resistors and capacitors to satisfy the equation f= 1/(2xpi*R*C) my frequencies are from 250 HZ to 550 HZ. Yes the RC filter is attenuating the signals Can u kindly tell me name of any common collector amplifier which ic an use after this RC network
  11. M

    Need Help for Proteus and LC Circuit

    I have checked the sound in LAB in experiment. I am not talking abt sound in Proteus
  12. M

    Need Help for Proteus and LC Circuit

    the complete details are here I have designed a circuit in protues. The circuit is made by 555 timer IC and gives square waves. The square wave is almost 9 volt peak to peak and it is audible on 8 ohm speaker having 1/4 wattage. Now i have converted The square wave to sine wave by RC network...
  13. M

    Need Help for Proteus and LC Circuit

    i cannot listen output on speaker I have designed a circuit of RC network in proteus.In proteus i am listeing the output wave form of RC circuit in speaker When i patch it in lab, i dont listen anything I am using 8 Ohm Speaker and 1/4 watt The amplitude of my sinewave is 600 mVpp and DC...
  14. M

    Need Help for Proteus and LC Circuit

    Thanks a lot Steve and what abt LC Circuit Is that Ok Will that work in LAB
  15. M

    Need Help for Proteus and LC Circuit

    Hi I have made circuit in proteus which convert Square wave to sine wave through LC circuit I am getting perfect Sine wave by using components based on this formula f=1/[2pi *sqrt(LC)] I am using the osciloscope of proteus which is showing very good sine wave I have to listen this...
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