Here I will show you how to make your own stero speakers with amplification!
Step 1: Gather materials
Cardboard box - used as speaker housing, you can choose something more elegant
Drill bits - used to drill some holes
Two speakers - I chose a pair of generic 8 ohm ones lying around
Here are the parts for the amplifier circuit:
1x TDA2822M amplifier IC
2x 100uF capacitors
2x 470uF capacitors
2x 0.1uF capacitors
2x10K ohm resistors
2x 4.7 ohm resistors (I used 3.3K and it worked fine)
Step 2: Build the circuit
Step 3: Build the enclosure and install speakers
Next I used hot glue to glue the two speakers in.
Step 4: Test
The amplifiers will work up to a voltage of 18v. For testing I connected a small 4.8 volt rechargable battery.
Step 5: Put it together
I used a drill bit to drill the hole for the audio in.
I changed the power system to 6 AA batteries in series, so that at camp I could just replace the AAs instead of bringing a battery charger.