escalating PWM oscillator

Discussion in 'The Projects Forum' started by chaoticlove, Jan 23, 2012.

  1. chaoticlove

    Thread Starter New Member

    Jan 23, 2012
    1
    0
    i have the schematics for a PWM using a 555 Ic and an RC network taken from this forum:
    http://forum.allaboutcircuits.com/showthread.php?t=24028

    instead of changing the Oscillation time manually with a poti, i need it to steadily change the pulse time, and thought of using another 555 PWM circuit but i dont know how to combine them together .

    any thoughts will be appreciated,


    thanx

    Tom
     
  2. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    The pot in the circuit changes the duty-cycle of the pulses which is PWM. The pot does not change the frequency.
     
  3. Wendy

    Moderator

    Mar 24, 2008
    20,766
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