Portable speaker for MP3 player


juho-eric.blogspot.com writes:

I made this portable speaker in the summer. It mixes the stereo input into a mono signal, which is then amplified. It’s powered by a six pack of AA batteries. The batteries are held in an external battery pack, so they are easy to change on the fly, without the need of a screwdriver.

Portable speaker for MP3 player – [Link]


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