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Make a powerful and better sound amplifier completely homemade with scrap materials. Make the sound of your PC or cell phone louder, very simple and it turned out powerful, check it out! Materials: 1 - Resistor 1k 1 - Electrolytic capacitor 1000uF / 16v 2 - Transistors 13007 1 - Plug P2 1 - Speaker 1 - 50k potentiometer 1 - 12v power supply coil (PC source or motorcycle battery, car or bench source) *Almost all recycled from PC source ♦️ EXCELLENT COURSE IN CELL PHONE REPAIR AND MAINTENANCE: New link: https://hotm.art/JNNPRyo ♦️ EXCELLENT ELECTRONICS COURSE: http://bit.ly/2ogowQp ♦️ EXCELLENT 3D PRINTING COURSE: http://bit.ly/2RYsyc5 ♦️ EXCELLENT GAMES DEVELOPMENT COURSE: https://hotm.art/Iks0JW4 ♦️ EXCELLENT ONLINE ARDUINO AND ROBOTICS COURSE: http://bit.ly/2knhzvG