- Published in issue 1/2019 on page 78
My Little Amplifier
LM386 gets a makeover
Even an IC that has clocked up some fifty years on the market is not necessarily hopelessly obsolete. A case in point is that several semiconductor companies are still making the LM386 power operational amplifier, and even now are bringing out new and improved versions.
Component List
Resistors
R1 = 10Ω
P1 = 10kΩ log. law potentiometer
Capacitors
C1 = 330nF, 5mm pitch
C2,C4 = 10nF, 0.1’’ pitch
C3 = 100µF 50V, 3.5mm pitch, 8mm diam.
C5 = 47n, 0.2’’ pitch
C6 = 220µF 50V, 3.5mm pitch, 8mm diam.
Semiconductors
D1 = 1N4001
IC1 = 7805
IC2 = LM386
Miscellaneous
ST1 = PCB screw terminal block, 5mm pitch
DC adaptor socket
DIP-8 IC socket
Loudspeaker, 1W, 8Ω
PCB type ELPB-NG, Elektor Store # 150180-1
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