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.
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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
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.