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After several tests I managed to make some improvements to the sound amplifier project with scrap! Check it out! List of Materials: 4 transistors 13007; 1 Capacitor of 1000uF by 16v; 1 resistor 1k; 1 Potentiometer of 1k; 1 Fan; 1 Coil; INSTAGRAM: @leandrofellipeoficial Want to send something? Post Office Box 74776 Mangaratiba RJ ZIP Code 23860000