1. The document describes a system to control electrical appliances like lights, fans, and TVs using hand claps. 2. The system uses a PIC microcontroller and condenser microphone to detect clap sounds and trigger relays connected to appliances. 3. Different clap patterns correspond to turning appliances on and off - one clap turns on the first device, two claps the second, and three claps the third. This provides a low-cost control method that could benefit physically challenged users.