Pocket Stereo Amplifier

a while a go i came across this instructable: Rechargable pocket sized amplifier
and loved the idea of a pocket sized audio amp but was disappointed but its lack of capability, namely only using mono amplification and only having 1 output option 
hence the idea for the stereo amplifier was born
doing a little digging on  amplifier IC's I found the LM 386 a mono amplifier ic with some extra capability's like bass boost and 200 times gain settings (but more on those later)

So how do you take a Mono amplifier and make a stereo? easy, stack 2 side by side

this amp also contains 3 output modes: internal speakers, external 3.5mm jack and RCA

Materials and components:
(image 1)
2 - LM386 (mono-audio amp)
2 - 8 pin ic holder
2 - 3.5 mm audio socket
2 - speakers
2 - 2 pole 2 throw switch 
2 - 33nF capacitors
2 - 47nF capacitors
2 - 10µF capacitors
2 - 220µF capacitors
2 - 10? resistors (colour bands brown, black, black)
2 - 10K? resistors (colour bands brown, black, orange)
1 - double RCA socket
1 - 2 gang linear 10k potentiometer
1 - potentiometer knob 
1 - 2 pole 3 throw switch
1 - 1 pole 2 throw switch
1 - 9V battery
1 - 9V battery clip
1 - ultra mini experimenters board or other small perf board
1 - project box
- mutli- coloured single strand copper wire, (not shown)
- masking tape (not shown)
2 - screws (not shown)

Tools:
(image 2)
- soldering iron
- hot glue gun
- solder sucker 
- solder
- wire cutters
- pliers
- screw driver set
- multimeter
- dremel or a drill
- ruler (not shown)
- sandpaper (not shown)
- glue (not shown)

View the original article here