Ex. 1915. An Arduino analog input voltage is 3.160 volts. Arduino PWM output pin drives a low-pass filter, as shown in Figure 1915. The low-pass filter converts the PWM signal back to an average-DC voltage. Arduino specifications include: I/0 voltage range of e to 5VDC; 10-bit A/D input; and an 8-bit D/A PWM output. The analog input DC voltage results in an analog output DC volage at the low-pass filter. Determine (Vout Vin).

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