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LM386 AF AmplifierProject
F&DARS January 2001
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Construction Sequence
•Baseboard and front panel•LM386 amplifier board•interconnections•Power up and test
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Main Layout Diagram
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LM386 Board layout
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LM386 Board Legend
IN = screened audio input lead connection
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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...........
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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.........
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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
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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