Homework 6 Solution

# Question 5 atmega128 adc programming 5 pts describe

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Unformatted text preview: b. What is the corresponding digital reading from the ADC output? (3 pts) The formula is v / V’max = d/M. Note that in this case, V’max = 2.56V, not 2.0V. The voltage range for the sensor is different from that of the ADC. Then, v/2.56 = d/1024 d = 400*v = 400 * 0.82 = 328 c. If the digital reading is 200, what is the range of the analog value? Note that each digital number corresponds to a step (a small range in the span) of the analog value. (4 pts) From (b), d = 400*v, so v = d/400 = 300/400 = 0.75v Step size of voltage is 2.56v/1024 = 0.0025v Range is [0.75V, 0.7525V) From (a) and (b), d = 400*v and v = 0.01 * (a + 50) So d = 400 * 0.01 * (a + 50) = 4 * (a + 50) Name: Lab Section: a = d/4 – 50...
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