ABSTRACT
This chapter examines the advantage of running the infrared light-emitting diode (IRLED) at high currents becomes obvious when the output versus IRLED current. The average current is related to the maximum DC current allowed. The chapter demonstrates how to determine the usable power at the receiver, and utilizes two calculations as examples. The first system will utilize a focusing lens designed to focus the IRLED energy within a 25-ft-diameter circle. The second system used for demonstrating sample calculations will utilize a narrow-beam T-1 3/4 GaAlAs IRLED without an external focusing lens. The photosensor usually consists of a photodiode and a high-gain amplifier. Pulsed operation of IRLEDs and infrared receiver modules are commonly used for many useful applications. They can be used to control many functions of audio/video equipment such as the television, VCR, CD, and DVD. They can be used on other home appliances such as air conditioners and fans.
