In other words, the signal is actually rapidly turning on and off when it appears to be on in the figure. When the signal is high, a 40 kHz IR signal is transmitted, and when the signal is low, nothing is transmitted. The following waveform shows the IR code transmitted for STOP on my Sony CD remote control (RM-DC335). Different buttons correspond to different codes, which cause the signal to be turned on and off in different patterns. This transmission consists of a 40kHz signal which is turned on and off in a particular pattern. When you press a button on a Sony remote control, an infrared signal is transmitted. Understanding these three ways will allow you to get codes from different sources and understand them correctly.
One key point of this article is that there are three different ways to interpret the same IR signal and turn it into a hex code.
This article is aimed at the hardware hacker and assumes that you are familiar with binary and hexadecimal, so be warned :-) The article is intended to describe codes for use with my Arduino infrared remote library, but the information should be generally applicable.
#Transmitter for a power screen commander 510 how to
This article describes how to understand Sony IR codes and how to get them from the LIRC files.
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