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abut arduino

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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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    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 be 0 decimal and +2.5V will be 1023

     

    this assumes the input sine wave is appropriatly scaled to a +-2.5V max signal

     

    All the questions Mike asked are still valid though, please provide

     

    You also have not said what resolution you desire to read the values, I am assuming 10 bit based on the built in ADC of the arduino and with my proposed solution, you will have 9 bits in each direction (Simple assume the MSB is a sign bit

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  • 0

    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 be 0 decimal and +2.5V will be 1023

     

    this assumes the input sine wave is appropriatly scaled to a +-2.5V max signal

     

    All the questions Mike asked are still valid though, please provide

     

    You also have not said what resolution you desire to read the values, I am assuming 10 bit based on the built in ADC of the arduino and with my proposed solution, you will have 9 bits in each direction (Simple assume the MSB is a sign bit

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