1. LM386 AF Amplifier Project
F&DARS January 2001

3. Construction Sequence
Baseboard and front panel
LM386 amplifier board
interconnections
Power up and test

4. Main Layout Diagram

5. LM386 Board layout

6. LM386 Board Legend
IN = screened audio input lead connection

7. COMPONENTS LIST (1)
Resistors
RV1 10k Log pot
R R
Capacitors
C1 1 microF electrolytic, 16v
C nF ceramic
C microF electrolytic, 16v
C microF electrolytic, 16v
C nF polyester more

8. COMPONENTS LIST (2)
Capacitors (contd)
C microF electrolytic, 16v
C 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

9. 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

10. 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