Introduction to Logic diagrams and truth tables

Starter In pairs answer these questions What does Boolean mean? Can you think of different sensors? Why would use a not gate with a light sensor?

Learning Objectives We are learning to use Logic diagrams and truth tables. Learning Outcomes All – Not, And, Or Gates Most-NAnd, NOr and Xor Some - able to draw diagram using gate symbols.

And Gate

Or Gate

Not Gate

Have a go See the diagrams that have been sent and you have a go.

AND gate Input A Input B Output (Q) 1 Produces an output only if both inputs are on Input A Input B Output (Q) 1

OR Gate Input A Input B Output (Q) 1 Produces an output when one or the other input are active…. Input A Input B Output (Q) 1

NOT Gate Input (A) Output (Q) 1 A NOT gate inverts its input 1 could play the opposite game?

Some Fun Questions. Logic Lab http://www.neuroproductions.be/logic-lab/ Or Logic https://logic.ly/demo/

Explain possible use Fire Alarm. Outside light Any others?

Nand

Nor

Xor (Exor)

Have a go See the diagrams that have been sent and you have a go.

NOT AND = NAND Input A Input B A.B Output (Q)=A.B 1

NOT OR = NOR Input A Input B A+B Output (Q) A+B 1

XOR – Exclusive OR Input A Input B Output (Q) 1

Truth table video Go through gates

Plenary Review Not, And, Or Review NAnd, Nor, Xor

Main Task Complete the Sheets Make sure this is completed for Prep