Design And Construction Of An Audio Controlled Running Light

Electrical Electronics Engineering | Industrial Physics | Physics

The design and construction of an audio-controlled running light involves creating a system that responds to sound signals to control the illumination pattern of a set of lights. This project integrates elements of electrical engineering, embedded systems, and signal processing to synchronize the light output with audio input. The process typically begins with selecting suitable microcontrollers, sensors, and LED modules to facilitate sound detection and light modulation. Signal processing algorithms are then developed to analyze the audio input and translate it into control signals for the LEDs. The construction phase entails assembling the electronic components on a prototyping board or PCB, wiring the circuitry, and integrating it with the LED array. Calibration and testing are crucial steps to ensure the responsiveness and accuracy of the system to various audio inputs, optimizing its performance for applications such as music visualization or interactive installations. Additionally, considerations for power efficiency, robustness, and user interface may influence the final design. Overall, the project showcases the intersection of electronics and audio processing, offering an engaging and dynamic visual experience driven by sound cues, suitable for entertainment venues, events, or personal projects.

This mains operated audio controlled running light can be used in discotheques. The lamps glow in running sequence as per the sound of music. Of the ten AC lamps, only one lamp permanently glows if there is no sound. When music is played, light starts ‘running’ through the lamps. The condenser mic converts audio signals into electric signals. Transistor T1 amplifies the microphone signals, which provide clock pulses to decade counter IC CD4017 (IC1). Preset VR1 is used to vary the signal level. The Q9 output provides reset signal to pin 15 of IC1. Divided-by-10 signals are fed to clock pin 14 of IC2, which is another decade counter. The outputs of IC2 drive transistors to provide triggering pulses to triacs. Triacs, in turn, drive the AC lamps.

TABLE OF CONTENTS

COVER PAGE

TITLE PAGE

APPROVAL PAGE

DEDICATION

ACKNOWELDGEMENT

ABSTRACT

CHAPTER ONE

1.0 INTRODUCTION

1.1 BACKGROUND OF THE PROJECT

PURPOSE OF THE PROJECT
AIM OF THE PROJECT
OBJECTIVE OF THE PROJECT
PURPOSE OF THE PROJECT
LIMITATION OF THE PROJECT
ADVANTAGES OF THE PROJECT
PROBLEM OF THE PROJECT
APPLICATION OF THE PROJECT
RESEARCH QUESTION
PROJECT ORGANISATION

CHAPTER TWO

LITERATURE REVIEW

OVERVIEW OF THE STUDY
REVIEW OF THE RELATED STUDY

CHAPTER THREE

3.0 CONSTRUCTION METHODOLOGY

3.1 BASIC OF THE SYSTEM

3.2 BLOCK DIAGRAM OF THE SYSTEM

3.3 SYSTEM OPERATION

3.4 CIRCUIT DIAGRAM

3.5 CIRCUIT DESCRIPTION

3.6 DESCRIPTION OF COMPONENTS USED

3.7 POWER SUPPLY UNIT

CHAPTER FOUR

4.0 TESTING AND RESULTS

CONSTRUCTION PROCEDURE AND TESTING
INSTALLATION OF THE COMPLET DESIGN
ASSEMBLING OF SECTIONS
TESTING OF SYSTEM OPERATION
COST ANALYSIS

CHAPTER FIVE

CONCLUSION
RECOMMENDATION
REFERENCES

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Audio Controlled Running Light Circuit

Fig. 1: Circuit for audio controlled running light

Fig. 1 shows the circuit for the audio controlled running light, while Fig. 2 shows the pin configuration of triac BT136.

The condenser mic converts audio signals into electric signals. Transistor T1 amplifies the microphone signals, which provide clock pulses to decade counter IC CD4017 (IC1). Preset VR1 is used to vary the signal level. The Q9 output provides reset signal to pin 15 of IC1. Divided-by-10 signals are fed to clock pin 14 of IC2, which is another decade counter. The outputs of IC2 drive transistors to provide triggering pulses to triacs. Triacs, in turn, drive the AC lamps. You can now see the lights running with the sound of the music.

Fig. 2: Pin configuration of triac BT136

Frequency-divider ICs CD4017 have been used here to reduce the audio to a noticeably low frequency. AC mains is rectified by diode D11, regulated by zener diode ZD1 and filtered by capacitor C4 to power the circuit.