Tap-Sensitive Color-Changing LED System

📋 Overview

This embedded systems project uses an LPC21xx microcontroller to detect taps and light different LEDs based on the number of taps within a 1-second window.

🎯 Features

• Tap detection within a time window
• LED color mapping:
  • 1 Tap → Red
  • 2 Taps → Green
  • 3 Taps → Yellow
  • 4 Taps → Blue
  • 5 Taps → Purple
• LCD display of current tap count and color
• Efficient refresh using last count tracking

🔧 Hardware Used

• LPC2129 Microcontroller
• 16x2 LCD (4-bit mode)
• 5 LEDs (Red, Green, Yellow, Blue, Purple)
• Tap Sensor (Active-High)
• Breadboard and Jumper Wires

🛠️ Software

• Keil uVision or GCC ARM toolchain
• proteus 8 professional
• delay_headers.h, LCD_4Bit_header.h

🚀 Setup

1. Connect tap sensor to P0.7
2. Connect LEDs to P0.8–P0.12 with resistors
3. Connect LCD in 4-bit mode
4. Flash main.c to the LPC21xx
5. Observe LCD and LED behavior upon tapping

🎥 Demo

• proteus simulation
• Hardware video

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🧑‍💻 Built by Shyam Ganesh for Bilimbe Embedded Interview Task