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

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

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

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

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

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

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

Thank You! 8