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.

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.

Here it is the circuit diagram of active low decoder.

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

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

After soldering and connecting jumper wires its look like this.

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.

Thanks for watching.