How to Make Remote Control Home Appliances Using IR Sensor and Arduino?

The discussion focuses on designing a simple remote control system for home appliances such as bulbs and fans using an IR sensor and Arduino or basic electronic components. The user intends to use a common TV or AC remote as the IR transmitter without purchasing a dedicated IR remote. Key points include the complexity of decoding IR signals due to proprietary encoding protocols involving start bits, data streams, and checksums. A microcontroller or dedicated IC is typically required to interpret these signals. Suggested components for a basic circuit include an IR photodiode or IR receiver module, transistor, relay, and possibly encoder/decoder ICs like HT12E and HT12D for secure communication. The importance of using modulated IR signals (e.g., 5 kHz pulses) to avoid interference from ambient light is emphasized. Reference circuits and tutorials such as those on electronicshub.org were recommended for practical implementation. Safety concerns regarding switching mains voltage (110/220V AC) were also highlighted, advising caution. Alternative solutions like RF remote-controlled switch modules were mentioned but the user prefers a DIY IR-based approach for an academic project.
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