LM386 AF Amplifier Project

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Presentation transcript:

LM386 AF Amplifier Project 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) Resistors RV1 10k Log pot R2 10R Capacitors C1 1 microF electrolytic, 16v C2 100 nF ceramic C3 10 microF electrolytic, 16v C4 10 microF electrolytic, 16v C5 100 nF polyester more...........

COMPONENTS LIST (2) Capacitors (contd) C6 100 microF electrolytic, 16v C7 1000 microF electrolytic, 16v C8 100nF polyester Integrated Circuit LM386 Audio Amplifier chip Miscellaneous Items Loudspeaker: not less than 8R, dia as avail. Switch: single pole, on-off more.........

COMPONENTS LIST (3) Input socket: e.g. phono OP Socket: e.g. min shorting jack, 3.5mm Battery connector for PP3 type Battery PP3 LM386 Board supports, e.g. 4 X resistors Hook-up wire as required Copper 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 dimensions Baseboard 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 diagonally LM386 amp. board 2" X 2" (51mm X 51mm) PCB islands 2 off, approx. 7mm square PP3 battery holder - or d/sided sticky / zip ties