Q. In reading the columns of a keyboard matrix, when no key is pressed then all the pins show

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Q. To see if any key is pressed, all rows are grounded.

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Q. Identify the row and the column for the following case when for the row D3-D0= 1110 and for the column D3-D0= 1101

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Q. What are the actual steps that are followed in identifying any key that is being pressed?

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Q. To identify that the key is present in which row and the column

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Q. The key detection and the key identification are two different procedures?

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Q. What is described by the following command?
KCODE0<<1

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Q. If the pins of the keyboard are used as an interrupt, then these pins will cause interrupt of what type?

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Q. What will happen if two keys of the keyboard are pressed at a time?

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Q. Why initially all keys are considered open before detecting the key pressed?

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Q. Which of the following is correct about the word resolution in ADC DAC converters in AVR’s?

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Q. In an ADC, we can calculate the output voltage from the formula

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Q. ADC0848 is a ____________ bit converter?

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Q. Which of the following factors can affect the step size calculation?

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Q. Which of the following is correct about the word sensors?

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Q. Why do we need to apply the concept of signal conditioning to a sensor?

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Q. Which of the following is correct about LM35 based sensors?

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Q. What is the difference between the LM34 and the LM35 based sensors?

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Q. Every transducer must be connected with the signal conditioning circuit?

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Q. LM35 provides _______ V for each degree count?

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