Infrared Communications

Below there are some measurements of simple IR transmitters and receivers.

Main conclusions are that some phototransistors are very slow. For faster transmission rates, a photodiode + amplifier works better.

Also, the signal edges become sharper when a stronger IR source is used (or an optical setup).

Simple Infrared Communication System
Simple Infrared Communication System
Physical Construction of IR Experiment
Physical Construction of IR Experiment
IR Communication - Transmitter (top) and Receiver (bottom)
IR Communication – Transmitter (top) and Receiver (bottom)
IR Communication (detail)
IR Communication (detail)
Signal on IR Led and Photodiode
Signal on IR Led and Photodiode
Photodiode + transistor
Photodiode + transistor
Photodiode + Transistor, close proximity
Photodiode + Transistor, close proximity

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