In another thread ( http://forum.allaboutcircuits.com/showthread.php?t=74828 ) I said I was going to try to build a guitar amp using a TDA2005R. Tonight, I finished the perfboard prototype, and it works. As you can see from the photo, I don't yet have a permanent connection for the input, and am currently using a (white) cliplead. This is because I haven't yet built the pre-amp stage. (I am planning an MPF102 circuit with gain and tone control.)
For test purposes, I am using my MP3 player as an input source, and must turn the drive from the MP3 player way down in order to avoid really loud audio from the speaker. In fact, the gain of the amp is so high that I am not sure if I really need the preamp. I am also building a cigar box guitar, but it's not far enough along to connect to the amp. I hope to finish it within a week or two.
Anyway, here's the circuit (from the ST datasheet) and the prototype as it currently is built.
For test purposes, I am using my MP3 player as an input source, and must turn the drive from the MP3 player way down in order to avoid really loud audio from the speaker. In fact, the gain of the amp is so high that I am not sure if I really need the preamp. I am also building a cigar box guitar, but it's not far enough along to connect to the amp. I hope to finish it within a week or two.
Anyway, here's the circuit (from the ST datasheet) and the prototype as it currently is built.
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