How to increase frequency from 50hz to 1Khz or more?

Discussion in 'Homework Help' started by Nelson2001, Apr 8, 2013.

  1. Nelson2001

    Thread Starter Member

    Nov 10, 2011
    27
    0
    I want to make RLC resonant circuit, but aI need increase the frequency to make the inductive reactance bigger!, and the q=XL/R, must be 10 0 100 times greater, to see the voltage in L or C and R. its only for learning.
    I want to bearboard a RLC, but the problem is that I have 12 volts, 50HZ frequency. So the Inductance should be a bigger one.
    The problem : I dont have a frequency generator, AND the inductor from the electronics shop is 1mh maximun. So the reactive inductance is XL= 2*pi*50*.001=0,314159... OHMS.
    A friend told me build a circuit with a LM741 operational to increase the frequency but i dont know what to read or bibliography to look.
    THANKS AGAIN
     
  2. t06afre

    AAC Fanatic!

    May 11, 2009
    5,939
    1,222
    Ouch no please do NOT use a 741 type opamp. Use a opamp by all means. But not a relic from 1969. Take a look at this ebook. It has a good section on oscillators www.ti.com/lit/an/slod006b/slod006b.pdf
     
  3. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    I saw not as of today a circuit for a 12v 50 HZ bearboard.

    It is in truth very hard and not be practice at all to make a RLC with smaller than lets say 3 KHZ.
     
    Nelson2001 likes this.
  4. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    1 mH has a self resonance of 500 KHz.

    The largest coils which are usually sold nowadays are 22mH or 47mH max.
     
    Nelson2001 likes this.
  5. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    KIA358? I have 20 here, brand new ICs. Same as LM358 I think. They work fine for some purposes.
     
    Nelson2001 likes this.
Loading...