ENGR 217 Questions and Answers

ENGR 217 Questions and Answers Resolution smallest unit of measurement/detectable change Bit Value tells you the number of possible binary numbers the device can output. Sensitivity change in output over change in quantity being measured. How does an ADC work? ADCs convert voltages that represent real world signals into bits that micro-compressors and software use to manipulate test data and control equipment. Successive Approximation compares recorded value to values up to max value that could be recorded and sees if the voltage difference matches. How a DAQ works A DAQ, which is an ADC, with a bit number "n" has 2^n voltage comparators, which consist of two voltage inputs. It Vab is positive, a positive value is returned and vice versa. Ohm's Law V=IR Adding Resistors in Series Req = R1+R2+R3 Adding resistors in parallel (1/Req) = (1/R1)+(1/R2)+(1/R3) Four Types of Noise Johnson-Nyquist, Shot, Burst, and Flicker Johnson-Nyquist Noise Random voltage variation in any object. Occurs due to electrons jumping around due to heat energy. Shot Noise Due to electrons in current moving faster/slower than average speed. Critical Mean Path path with the longest duration before project can be concluded. Finite difference method E =-∆V; -(phi2-phi1)/(x2-x1) Ethics ABET Outcome 2 An ability to apply engineering design to produce solutions the meet specified needs with consideration of public health, safety, and welfare, as wells global, cultural, social, environmental, and economic factors. Ethics ABET Outcome 4 An ability to recognize ethical and professional responsibilities in engineering situations and make informed judgements which must consider the impact of engineering solutions in global, economical, environmental, and societal impacts. What is a Microcontroller? It is a small computer on a single chip it contains a processor, memory, and input/output. They are typically embedded inside something they can control.