abut arduino

a sine wave is applied at a0 using a diode,so that it geets rectified and then after pwm the square obatIned is only with wrt positive cycle ,i need to generate pwm even during negative cycle and one way is to do it by full bridge rectifier .so is there any way by arduino coding i could get it

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clem57 over 9 years ago +1

Yes just measure both positive and negative values during entire cycle.
Robert Peter Oakes over 9 years ago +1

How about offset the sine wave to 50% of VRef (Capacitor coupled will do it, and a divider network), then simply read the whole waveform as a positive value this way 0V = 511 decimal from ADC, -2.5V will…

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0 amgalbu over 9 years ago

Hi
you could measure the time between two "zero crossings". That's the period of the PWM signal. During the negative part of the sine waveform, use a timer to drive PWM output

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Ambrogio
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0 amgalbu over 9 years ago

Hi
you could measure the time between two "zero crossings". That's the period of the PWM signal. During the negative part of the sine waveform, use a timer to drive PWM output

Cheers
Ambrogio
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0 Former Member over 9 years ago in reply to amgalbu

can u tell me the code for that
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