rasmadrak:
Ok, I’ll look around for a speaker version. The music and sound doesn’t have to be very loud, I believe the $7 amp was 1W and it was loud “enough”. So 3W would be just fine.
A cheap set of powered speakers, [like these, might work just fine then. Availability depends on where in the world you live.
rasmadrak:
I didn’t even get to plug the audio cable in, just power and ground - and the circuit burned.
I don’t know what to tell you in this case. You’d think applying just power and return (assuming the voltage was correct) wouldn’t be a problem.
rasmadrak:
The way it’s connected now (directly to the speakers) is:From mp3 trigger line-out, leftcable to left speaker positive and shield to negative, and rightcable to right speaker positive and shield to negative. This seem to work, but I’m not relying on it.
If I understand your meaning of shield above, then this would seem to put a 1.25VDC bias across your speakers. Generally not a good idea. This might heat the speakers (and MP3 Trigger) up a bit and will reduce the volume they can play at w/o distortion. Using the MP3 Trigger to drive speakers directly is the one case where you want to use the GBUF signal. In this case, GBUF to be connected to the speaker - terminal, in lieu of connecting the speaker - terminal to “shield”. I’m not sure the MP3 Trigger was designed to drive 8 ohm speakers but …
rasmadrak:
According to this http://www.all-electric.com/schematic/simp_mix.htm a simple passive mixer is just resistors, but I’m figuring capacitors can’t be bad as well.So, I’ve created a little schematics once again to show how I intend to connect everything…
Schematic looks OK. The caps are the DC blocking caps mentioned in the URL, needed for the reasons stated therein. The only thing that might concern me is tying the speaker - terminals to GND. Depending on the amp (for the reason I gave earlier), that may or may not be a good idea.](http://www.google.com/products/catalog?hl=en&biw=1007&bih=573&q=computer+speakers&um=1&ie=UTF-8&tbm=shop&cid=12193931570824534360&sa=X&ei=koX4TZK0CcLngQeZ15SYDA&ved=0CKwBEPMCMAU#)