1. Infrared Transmitter and Receiver
Brandon Agtarap
Dr. Gary Varner
Brandon Agtarap
Dr. Gary Varner 1

2. Introduction
Building an audio transmitter and receiver with the use of infrared light
Infrared (IR) light
Electromagnetic radiation with longer wavelengths than that of visible light
The infrared radiations are transmitted and received by IR LEDs and phototransistor respectively.
This project will emphasize the way which music can be driven by IR rays 2

3. Components Used Infrared LED Emitter Infrared LED Detector
Red LED light
Operational Amplifiers
LM386
NPN Transistors
3904
Resistors
10 Ω , 1K Ω , 4.7K Ω, 10K Ω, 15K Ω
Capacitors
.01 µF, 1 µF, 10 µF, 220 µF
8 Ω speaker
Voltage Generator 3

4. Transmitter Circuit Diagram of the Infrared Transmitter
Sends infrared signals from the audio source coming from the headphone jack 4

5. Receiver Circuit Diagram of the Infrared Receiver
Receives the infrared signals from the audio source and outputs the data through the speaker 5

6. Applications Ways of Communication Wireless Music Systems
Mobile Gadgets
Remote Controls
Infrared lasers 6

7. Summary Future Enhancements Advantages
Observe the transmission of an IR signal to a receiver using an LED.
Show that digital information can be converted to an electrical signal that is sent to the receiver, then driven through an amplifier-speaker.
Disadvantages
Not made for long distance
Noise of the audio output
Future Enhancements
Modify circuit for optimal performance 7

8. Thank You! 8