KEYPAD
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Question 1 of 10
1. Question
Keyboard works on concept of _____________
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Question 2 of 10
2. Question
Matrix Keypads are commonly used in_______
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Question 3 of 10
3. Question
To connect a 4×4 keypad (16 switches) to a microcontroller we need_____
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Question 4 of 10
4. Question
The status of each keys can be determined by a process called____
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Question 5 of 10
5. Question
Whenever we press a button______
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Question 6 of 10
6. Question
What is the status of pin connected to switch when pressed?
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Question 7 of 10
7. Question
Whenever we find the Row at logic 0, means ______
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Question 8 of 10
8. Question
Conditions to be considered while interfacing keypad are
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Question 9 of 10
9. Question
When a key is pressed the contact bounce back and forth and settle down only after a small time delay is called as __________
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Question 10 of 10
10. Question
To detect a pressed key, the microcontroller grounds all the Rows to Logic level 0 and all the columns to Logic level 1.
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