24v to +/- 15v pulse conversion.

Discussion in 'General Electronics Chat' started by vrvrao, Nov 5, 2012.

  1. vrvrao

    Thread Starter New Member

    Sep 17, 2012
    20
    0
    Hello ,

    I need to convert a 24v DC into a +/- 15v Pulse signal.

    I tried using 555 timer, all i could get is 0 - 24v pulse signal.

    Can any one help me out in getting +/-15 v pulse signal.

    thanks.
     
  2. ramancini8

    Member

    Jul 18, 2012
    442
    118
    What do you want? PS voltage? 24Vdc is an input? Do you want either +15 or -15 out, or a signal that swings from +15V to -15V or vice versa? Quality questions get quality answers.
     
  3. crutschow

    Expert

    Mar 14, 2008
    12,988
    3,226
    If you want a ±15V pulse to ground then you need at least a 30V supply. How much current does the ±15V signal require?
     
  4. vrvrao

    Thread Starter New Member

    Sep 17, 2012
    20
    0


    Thnks for reply.

    24V DC is the input and i need output signal that swings from +15v to -15v.
     
  5. vrvrao

    Thread Starter New Member

    Sep 17, 2012
    20
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    Actually i have an source of 24v DC, can we get using this source.

    Current requirement is 2 - 3A.
     
  6. crutschow

    Expert

    Mar 14, 2008
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    Does the 2-3A load for the ±15V pulse need to be grounded?
     
  7. vrvrao

    Thread Starter New Member

    Sep 17, 2012
    20
    0

    Ya gnd is nedded.
     
  8. vrvrao

    Thread Starter New Member

    Sep 17, 2012
    20
    0

    I can stepup 24 v to 30 v, can you please let me know,

    how can we get ±15Vpulse signal from it.

    thanks
     
  9. m1ch43l

    Member

    Aug 16, 2012
    62
    1
  10. m1ch43l

    Member

    Aug 16, 2012
    62
    1
    Then feed your resulting oscillating +/- voltage signal to your FETs (do' no whether you'll use a PMOS and NMOS arranged in such a manner that you tap the 2amps you need from the junction between both fets; NMOS source and PMOS drain...correct me if I'm wrong... :rolleyes:). Ditch any pulldown resistor you might have: ie, a resistor across the gate-source pins of your FET.
     
  11. vrvrao

    Thread Starter New Member

    Sep 17, 2012
    20
    0

    Thanks,

    Using 555 timer and 24 v DC supply, i got a 0 - 24v pulse signal,

    but where as i need a ± 15 v pusle (Sqaure) signal not the sine wave .
     
  12. vrvrao

    Thread Starter New Member

    Sep 17, 2012
    20
    0


    Hello crutschow,

    Can you please let me know how can we get an ± 15v Square ( Pulse) signal from 30v DC supply.
     
  13. crutschow

    Expert

    Mar 14, 2008
    12,988
    3,226
    If the square-wave is symmetrical then you can generate a 30V square-wave and run it through a large capacitor.
     
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