Binary Lesson 3 (Logic Gates)

• Computing
• Lower Secondary (Key Stage 3)

Logic Gates

What is this diagram showing?
How is binary involved?

Binary and logic gates 

Aspire: To be-able to understand the three different logic gates (NOT, AND, OR).

Conquer :To be-able to solve several gate problems. 

DO now answer

This circuit is showing a lightswitch and light bulb, the light switches have 2 states on and off. 

What is a Logic Gate?

A logic gate is a device that acts as a building block for digital circuits. 

They perform basic logical functions that are fundamental to digital circuit.

The most common logic gates are:

AND Gate

NOT Gate 

OR Gate

Video 

Click here to watch 

NOT Gate - Diagram  Table

Output is true if:​ Input is false​

Output is false if:​ Input is true

AND Gate - Diagram and Truth Table

Output is true if: All inputs are true

OR Gate-Diagram and Truth Table

Output is true if:​  At least one Inputs is true

What is a logic gate?

1. A circuit
2. A number
3. A computer
4. A light switch

What is the rule for a not gate

1. The value is flipped
2. Both must be on
3. One must be on
4. Both should be off.

What is the rule for a and gate

1. The value is flipped
2. Both must be on
3. One must be on
4. Both should be off.

What is the rule for an or gate

1. The value is flipped
2. Both must be on
3. One must be on
4. Both should be off.

Multiple Gates

Gates can be connected to other gates for more complex circuits​

Below we can see an AND gate along with a NOT gate. 

Multiple Gates

Gates can be connected to other gates for more complex circuits​

Below we can see an AND gate along with a NOT gate. 

Complete the circuits worksheet

Use logicly to build the circuit. 

Extension tasks

If you complete the worksheet, use 1 of these 4 extension tasks to develop your skills.

Code combat

Toxicode

Nitrotype

Semantris