Audio Amplifier Project - PowerPoint

							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