Wireless MEGAPHONE

Make a portable and powerful megaphone using a speaker in a wooden box, amplifier circuit, and a battery. Perfect for public speaking, events, or emergencies. Materials Needed : - Self assembled Mic pre and bass,Treble circuit - Speaker (8Ω, 20W) - Amplifier circuit (LA4440-based) - Wireless mic & its receiver - Wireless mic transmitter - Battery (12V, 4A) - Power supply (12V transformer) - Enclosure (wooden speaker box) - Wiring and connectors - Mic (dynamic) Steps : 1. Assemble the amplifier circuit with LA4440 IC. 2. Connect wireless mic receiver output to amplifier input. 3. Connect speaker to amplifier output. 4. Mount components in enclosure. 5. Pair wireless mic transmitter with receiver. 6. Add battery and power supply. Tips : - Use a suitable enclosure to amplify sound. - Ensure proper impedance matching. - Add a volume control.