PCB DESIGN-

PCB-DESIGN-

This repository contains the PCB design files for a 2-layer Arduino Nano based electronic dice.
The dice lights up LEDs in standard dice-dot patterns from 1 to 6 when the push button is pressed.

Project Overview

The aim of this project is to design a compact and clean PCB that connects an Arduino Nano, seven LEDs, one push button, current-limiting resistors, and a 5V power input. The Arduino reads the push button input and turns on the required LEDs to display a random dice number.

Features

• Arduino Nano used as the main controller
• 7 LEDs arranged in a standard dice-face pattern
• Push button input for generating a dice value
• Standard 5V power input connector
• 2-layer PCB design
• Bottom layer used as a ground plane
• Rounded board corners
• 4 mounting holes, one near each corner
• Neat component placement and routed PCB traces

System Working

The push button is connected between an Arduino digital input pin and GND.
When the button is pressed, the Arduino detects the input signal and selects a random number between 1 and 6. According to the selected number, the Arduino turns ON the correct set of LED output pins so that the board displays the same dot pattern as a real dice.

Microcontroller Input and Output

Input

The other terminal of the push button is connected to GND. The design can use the Arduino internal pull-up mode for the button input.

Outputs

Each LED is connected through its own current-limiting resistor.

LED Dice Pattern

The LEDs are arranged in a dice-like structure:

D1          D5

D2    D4    D6

D3          D7

Dice Number Logic

PCB Design Specifications

• Board size: 51 mm × 51 mm approximately
• Board type: 2-layer PCB
• Corner radius: 5 mm
• Signal trace width: 0.3 mm
• Power trace width: 0.5 mm
• Bottom layer: ground plane
• Mounting holes: 4 holes, 3 mm diameter each
• Components placed on the top layer except the power connector

Main Components Used

Notes

This project focuses on clean PCB placement, neat routing, proper dice LED spacing, and correct use of a bottom ground plane. The LED arrangement is kept visually similar to a real dice face so that the output is easy to recognize.