The amp is meant to be used outdoors in the sun so there was no need for a battery. Also even if I charged a 9VDC battery it would only last about 15-20 minutes inside anyway.
Comments as always are very welcome. This is my first time powering anything with the sun.
Step 1: What you need
I found these speaker boxes at a rummage sale, they cost me $4 for both. What a deal!! You should be able to use any detachable speakers for this. great if you have a dead boom box or have scrounged the parts out of one, say to use a tape head for a tape delay. (instructable coming soon as i can scrounge enough tape heads)
LM386 Amplifier chip
5K linear potentiometer
1M audio potentiometer
10 Ohm resistor
Solar panels/power section:
2 x 2200uf electrolytic capacitors
I found 9VDC at 100mA seemed to be the magic number for me. I got mine through American Science & Surplus at 4.5 VDC by 50 mA you need 4 of these.
A sheet of plexi to mount the panels to
A hollow ball joint to feed the power wires from the inside of the speaker housing