Active Low Decoder (BCD Decimal)

Hello! Instructables

Welcome to my active low decoder (BCD Decimal) project. It's a topic of Digital And Logic Design by Morris Mano (fifth edition).

I just build it as a hardware.

Step 1: Basics

Before starting this project you'll need to know how its work. So with the help of this picture you can understand easily what i mean actually if you didn't understand yet no problem at the last step i uploaded a small video about active low decoder.

Let's get started.

Step 2: Circuit Diagram

Here it is the circuit diagram of active low decoder.

Step 3: Parts

You'll need

Vero board

IC's: 74ls42 with base and LM7805 (regulator)

Resistors: 330ohm x 10, 1k x 5

Leds: green x 10 and red

Switches: spst x 9 (4 spst is optional)

9 volt battery with connector

Step 4: Component Placing

Place the components on vero board according to circuit diagram then soldering it.

Step 5: Soldering

After soldering and connecting jumper wires its look like this.

Step 6: Complete

Now Active low decoder (BCD decimal) is ready to use. In next step a small review about active low decoder in a video is clear your concepts.

I hope you like my DLD active low decoder project.

Step 7: Active Low Decoder (video)

Thanks for watching.