555 astable at 50 percent with inductor to smooth cap timing

149

02:16:44

Astable 555 at 50% with an inductor it changes the saw tooth wave into a  sharp sine wave and an even charge / release for your cap

published 11 years ago

qwerfgh

11 years ago

Thanks for taking time bro. But if you look carefully it is not perfect 50%.....

qwerfgh

11 years ago

The time in ON state is larger than its OFF state ...

rockwog

11 years ago

Just play with the resistance

rockwog

11 years ago

I thought you wanted 50% duty , 3.5 volts to 7 volts . The cycle timing is capicitor load devided by resistance

qwerfgh

11 years ago

Changing resistance 1 only changes it proportionally.... The duty cycle remains same.... I know it izz veryy close to 50% but its not totally 50%.. I searched google.. This circuit according to them should generate perfect 50%. But here it doesnot...

qwerfgh

11 years ago

Changing resistance 2(right side) will only change amplitude

Sine_eyed

11 years ago

Guys- duty cycle with a 555 has nothing to do with supply voltage. @rockwog- this is all wrong, sorry bud. This setup looks more like it wants to be a monostable. For an astable the 555 really needs a voltage divider of two resistors- starting at Vcc, the center at the discharge pin and the bottom of it tied to pins 6&2. From there it goes into C1 to complete the RC network..

Sine_eyed

11 years ago

Whoops! Correction- timing is independent of supply voltage. Not 'has nothing to do with it'.. X^)

rockwog

11 years ago

I don't know what the hell I'm talking about, I only major in mechatronics in college.

mikey5869

11 years ago

Ok if your such a genius how come you havent noticed that the trigger/threshold node peaks at plus and minus 30v? That will blow the poor little 555.

rockwog

11 years ago

There mikey..fixed that dilemma. ...minor oversight. : )

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