Experiment 20: Analyzing Infrared Remote Signals

Objective: Capture and decode signals from an infrared (IR) remote control.

Background:

Infrared communication is widely used in remote controls for electronic devices. The transmitted signals are typically modulated using a specific protocol such as NEC, RC5, or Sony, which can be decoded to extract the command data.

Steps:

1. Set Up the Hardware:
   • Connect an IR receiver module to a microcontroller or logic analyzer.
   • Ensure the IR receiver is powered correctly and positioned to receive signals from the remote.
2. Capture the Signal:
   • Point the remote control at the IR receiver and press a button.
   • Use the microcontroller or analyzer software to record the waveform.
3. Decode the Signal:
   • Analyze the recorded waveform to determine its modulation scheme.
   • Use an appropriate protocol decoder (e.g., NEC, RC5) to extract the command data.
4. Validate the Decoded Data:
   • Compare the decoded signal with the expected output based on the remote control's specifications.

Expected Outcome:

By completing this experiment, you will understand the principles of IR communication and learn how to decode signals from various IR remote protocols effectively.