Space coded The length of the space between the pulses is varied to represent data. Used by Panasonic remote controls. Shift coded The direction of transitions represent the data and all the bits have a constant timeperiod. Also known as RC-5 Used by Philips remote controls. In addition to this headers are used to initiate a transmission.
Headers usually consist of a long pulse sent before the train of data pulses.
The network layer is implemented by dividing the code into 2 parts. The receiver with the pin connection details Circuit setup and demo Please move your mouse over the different buttons of the remote control to see the waveform of the signal and it's respective encoding. The first 7 bits are the commands and the last 5 bits are the address bits. The data codes are sent using pulse coding. Each packet has 12 bits and a header.