3.7V Battery Se 4 Inch Speaker Ka BASS Test | LM358 BD139 High Bass Amplifier

706 просмотров · 5 дн. назад

ANEK ELECTRONICS

511 подписчиков

706 просмотров · 5 дн. назад

Parts: LM358 IC, BD139 Transistor, 18650 Battery 3.7V, 4 inch 4ohm 5W Speaker, 7uF Capacitor