DIGITAL DESIGN USING LOGIC.LY

TASK – LOGIC.LY’S INTEGRATED CIRCUIT

 

 

TASK DESCRIPTION

 

An integrated circuit (IC) is a small device that contains many tiny electronic components connected together.  Below is an image of an IC that we commonly use in class.

 

Logic.ly allows us to create a circuit and then package it as an integrated circuit.  In this task, you will learn how to create your own IC in Logic.ly.

 

THEORY

 

PART 1 – MEET THE 7408 CHIP

Below is the 7408 chip.  It contains 4 AND logic gates.

 

 

The pinout (diagram showing what each pin does) for the 7408 chip looks like this:

 

This chip contains 14 pins to connect to it.  Two of the pins are to power the chip in order to make it work.

 

The remaining 12 pins serve as input/output for the 4 logic gates.

 

One can use just one gate or all four at once.

 

PART 2 – LOGIC.LY’S INTEGRATED CIRCUIT OPTION

 

You can create your own IC in logic.ly.  It then creates a block diagram for you to use that circuit.

 

STEPS

 

1-Create the circuit.

 

2-Your circuit requires Toggle Switches for the inputs.  Each switch will need an Export name in the bottom window that pops up when you select it.  Use simply the input letters such a A, B, C, …

 

3-Your circuit requires one or more Light Bulbs.  Lights also require Export names such as Q, R, …

 

4-Select all components of your circuit (make a big rectangle around everything) and click on the Create Integrated Circuit button at the top.

 

5-Give your IC a name.

 

6-Now on the left, at the very bottom, you will find your new IC amongst the Custom components.  Simply drag it in and start using it.

 

TASK

 

Create your own version of a 7408 chip.  You will not include the two pins for power so your chip will have 12 pins in total (8 input pins and 4 output pins).

 

The first step is to create the circuit.  Then create the IC.  Then use the IC to test it.

 

Click here for a screenshot of the entire work but try to do this without basing yourself entirely on the example.

 

Remember to label your inputs and your output.  Organize your wires.  Be neat!

 

TO SUBMIT

 

A screen capture like in the example.