Let’s see how you did! If you didn’t get a few of these, don’t let it stress you out – it just means you need to play with more experiments in this area. We’re all works in progress, and we have our entire lifetime to puzzle together the mysteries of the universe!
Answers:
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1. What is a bit?
A bit represents a logic 1 or a logic 0.
2. What is a nibble?
A nibble is a collection of four bits, also called a “four bit word”.
3. What is a byte?
A byte is 8 bits or two nibbles.
4. What is a logic gate?
A digital logic device that controls its output based on the values of the gate’s inputs.
5. What is a truth table?
A truth table shows us what a digital ICs output should be based on the combination of possible inputs.
6. If we have a NAND gate with both inputs low, what is the output?
High.
7. If we have an OR gate with both inputs low, what is the output?
Low.
8. If we have a NOR gate with both inputs low, what is the output?
High
9. What is a pull-down resistor?
A resistor that is used to force the voltage on a digital input or output to ground.
10. What is a pull-up resistor?
A resistor that is used to force the voltage on a digital input or output to positive voltage.
11. How many gates are required to build a digital oscillator?
2.
12. What is a SR Latch?
A basic digital memory circuit.
13. What is an inverter?
An inverter will output the opposite of what is being input. So if a 1 is on the input of an inverter then the inverter will output a 0.
14. What is a D type Flip Flop?
A memory circuit that can be set, cleared, and also have data clocked in. The D type flip flop also has two outputs, the first is equal to the stored data and the seconds is the inverted value of the stored data.
15. What is switch bounce?
The electrical noise a switch generates when closing or opening.
16. How can we solve switch bounce?
Capacitors can be used to absorb the “electrical noise” from a switch.
17. What is a seven segment display?
A group of seven LEDs arranged to form a pattern in the shape of the number eight.
18. Why do we use seven segment displays?
To translate computer data into information people can easily understand.
19. What is a binary coded decimal counter?
An IC that counts like we do, but stores the data in binary.
20. What does a binary coded decimal to seven segment display IC do?
It takes the BCD data from a counter (or other source) and converts it to the data a seven segment display needs to display numbers people can understand.
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