8-bit ALU Implementation in IoT

Overview

This project demonstrates the design and implementation of an 8-bit Arithmetic Logic Unit (ALU) using various IoT components. The ALU adds two 8-bit binary values and displays the result on seven-segment displays. The main components include DIP switches, SN74LS83N Adder ICs, logic level shifters, a Raspberry Pi Pico, and seven-segment displays.

Table of Contents

• Features
• Components
• Hardware Design
• Software Design
• Circuit Diagram
• Setup Instructions
• Usage
• Acknowledgments
• Additional Files
• License
• Contact

Features

• Addition of Two 8-bit Binary Numbers: Inputs are provided via DIP switches.
• Real-Time Display: Results are shown on three seven-segment displays.
• Embedded Control: Raspberry Pi Pico processes input and controls the display.
• Voltage Level Shifting: Ensures compatibility between different components.

Components

Hardware

• DIP switches
• SN74LS83N Adder ICs
• Logic level shifters
• Raspberry Pi Pico
• Seven-segment displays
• Seven-segment decoder
• NPN transistors
• Resistors
• LEDs

Software

• Python for programming the Raspberry Pi Pico

Hardware Design

1. Schematic Design: Designed the circuit diagram using Tinkercad.
2. Input Handling: Used pull-down resistors with DIP switches for stable input signals and connected two 4-bit adder ICs to form an 8-bit adder.
3. Voltage Level Shifting: Converted the 8-bit output from the adder ICs (5V) to 3.3V using logic level shifters.
4. Data Processing and Display: Connected the output to the Raspberry Pi Pico, wrote a Python program to convert the 8-bit binary output to BCD, and controlled the seven-segment displays using NPN transistors.

Software Design

• Programming: Python code was used to read the 8-bit binary input, convert it to BCD, and control the seven-segment display.
• Control Mechanism: Utilized three control pins to manage the display of three seven-segment displays by turning them on/off through NPN transistors.

Circuit Diagram

The detailed circuit diagram is provided in the ALU Diagram.pdf file.

Setup Instructions

Hardware Setup

1. Connect the DIP switches, adder ICs, level shifters, seven-segment displays, decoder, transistors, resistors, and LEDs as per the circuit diagram.
2. Ensure all connections are secure and components are correctly oriented.

Software Setup

1. Clone the repository and upload the provided Python code to the Raspberry Pi Pico.

git clone https://github.com/sithulaka/8-bit-ALU-Implementation.git
cd 8-bit-ALU-Implementation

2. Connect your Raspberry Pi Pico to your computer.
3. Upload the alu.py script to the Raspberry Pi Pico.

Usage

1. Input: Use the DIP switches to input two 8-bit binary numbers.
2. Output: The sum of the input numbers will be displayed on the seven-segment displays.

Acknowledgments

Special thanks to Mr.Kavinda Madhubhashana for their invaluable technical advice and support throughout this project.

Additional Files

• alu.py: Python code for the Raspberry Pi Pico.
• ALU Diagram.pdf: Detailed circuit diagram.
• components.csv: CSV file listing all the components used.

License

This project is licensed under the MIT License. See the LICENSE file for details.

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