LM386 AF AmplifierProject

F&DARS January 2001

Construction Sequence

•Baseboard and front panel•LM386 amplifier board•interconnections•Power up and test

Main Layout Diagram

LM386 Board layout

LM386 Board Legend

IN = screened audio input lead connection

COMPONENTS LIST (1)

ResistorsRV1 10k Log potR2 10R

CapacitorsC1 1 microF electrolytic, 16vC2 100 nF ceramicC3 10 microF electrolytic, 16vC4 10 microF electrolytic, 16vC5 100 nF polyester

more...........

COMPONENTS LIST (2)

Capacitors (contd)C6 100 microF electrolytic, 16vC7 1000 microF electrolytic, 16vC8 100nF polyester

Integrated CircuitLM386 Audio Amplifier chip

Miscellaneous ItemsLoudspeaker: not less than 8R, dia as avail.Switch: single pole, on-offmore.........

COMPONENTS LIST (3)

Input socket: e.g. phono OP Socket: e.g. min shorting jack, 3.5mmBattery connector for PP3 typeBattery PP3LM386 Board supports, e.g. 4 X resistorsHook-up wire as requiredCopper clad board (various sizes - see next slide)Knob for pot Rubber feet (4)Thin coax, approx 3" for input connection

COMPONENTS LIST (4)

Copper clad board suggested dimensionsBaseboard 8" X 3.5" (200mm X 85mm)Front Panel 3" X 2" (78mm X 51mm)Side supports 2" X 2" (51mm X 51mm) - a single piece of this size cut in two diagonallyLM386 amp. board 2" X 2" (51mm X 51mm)PCB islands 2 off, approx. 7mm square

PP3 battery holder - or d/sided sticky / zip ties