For now I've decided to go for something simple to start out. I don't care how good or bad chip used will sound in the end, I just want to get my feet wet and have a finished product that WORKS :\
Among the many SMD chips I have, which will be too small for me to work with at this point in time, I have a bunch of through hole chips I'd like to maybe have a go at.
With that said, I now am wondering a couple things. The first Q(s) is a sort of "What is this and will it work?" I've got a few chips that my Google searching and Datasheet site browsing have turned up zilch for, but some have turned up possible hits (different part number prefix which I'm not sure if it changes the part function entirely or not).
As I have a new motherboard with a far superior audio codec than my last one, I've put aside my desire for a headphone amp. I'm now looking to drive 2 to 4 Logitech Z-560 Tang-Band (15W I believe, and I can dig up the Ohms if needed) Sat speakers. Mainly for simple Windows audio.
First is a Sanyo disconn item: STK5446 (I cannot find a datasheet or other info except These two things.)
-On the bottom right corner, in smaller font reads 1D09. On the thermal side is stamped 5446B and under it CC94 (Date code I assume given the age of the unit it came from)
Next: LA6510
-Has 4R9 on the line below. Not sure if that 1A output current is considered good or not... As the datasheet image show, it has a small metal, what I'll call "mono-fin heatsink" stick out the top with a hole. So if it is a decent choice I can probably sink it if that'll help any lol
Finally, which I think might be the best option: BA10324A (Here is also an older scanned original)
-There are a few other listings for datasheets on it, one being very long except it has an added F suffix (although... this one DOES list it in with the A and another), which could mean a whole lot as I've discovered so is pretty much irrelevant I think. It has no discernable manufacturer screened on it (to my untrained eye at least).
Honorable Mention, since I have 4 or 5 of them, and I'll who it verbatim how it reads off the chip...
2903D
---JRC
-.4047G
I've only bee able to track down a datasheet using "JRC2903D" but those results are a mixed bag it seems. It seems like possibly "NJR2903D" is it's new part number as NJR and JRC are one in the same or have merged. I thought I had a datasheet for it, but I can't seem to find it anymore
I THINK it was called a "Op Amp Comparator", which I've not exactly dug into what it's function is short of what it's name implies 
So yea, essentially wondering which would be the best one to start with. As for powering it, I could REALLY use suggestions. My plan is to spend almost nothing and use all the random parts I've salvage around here (which is amassing to be quite the assortment), with hopefully the only thing I'll need is resistors. Some of them I noticed the voltage requirements being a tad up there, I assume that ones showing -/+15V are essentially 30V components. While I have transformers around that I believe can supply, one that came out of the same component of the STK5446 was showing in the 40V area, but I have zero knowledge on how to wire up a transformer (the PCB it was on broke when I dropped the beast... oops)
And this might be a tall order, but from what I can tell some/all of those don't have a simple working circuit diagram, so if anyone would have an idea of how to wire one up for audio (provided they can do that), that would be a HHHHHHUGE help!!
Thanks again for everything!
-Clint
Among the many SMD chips I have, which will be too small for me to work with at this point in time, I have a bunch of through hole chips I'd like to maybe have a go at.
With that said, I now am wondering a couple things. The first Q(s) is a sort of "What is this and will it work?" I've got a few chips that my Google searching and Datasheet site browsing have turned up zilch for, but some have turned up possible hits (different part number prefix which I'm not sure if it changes the part function entirely or not).
As I have a new motherboard with a far superior audio codec than my last one, I've put aside my desire for a headphone amp. I'm now looking to drive 2 to 4 Logitech Z-560 Tang-Band (15W I believe, and I can dig up the Ohms if needed) Sat speakers. Mainly for simple Windows audio.
First is a Sanyo disconn item: STK5446 (I cannot find a datasheet or other info except These two things.)
-On the bottom right corner, in smaller font reads 1D09. On the thermal side is stamped 5446B and under it CC94 (Date code I assume given the age of the unit it came from)
Next: LA6510
-Has 4R9 on the line below. Not sure if that 1A output current is considered good or not... As the datasheet image show, it has a small metal, what I'll call "mono-fin heatsink" stick out the top with a hole. So if it is a decent choice I can probably sink it if that'll help any lol
Finally, which I think might be the best option: BA10324A (Here is also an older scanned original)
-There are a few other listings for datasheets on it, one being very long except it has an added F suffix (although... this one DOES list it in with the A and another), which could mean a whole lot as I've discovered so is pretty much irrelevant I think. It has no discernable manufacturer screened on it (to my untrained eye at least).
Honorable Mention, since I have 4 or 5 of them, and I'll who it verbatim how it reads off the chip...
2903D
---JRC
-.4047G
I've only bee able to track down a datasheet using "JRC2903D" but those results are a mixed bag it seems. It seems like possibly "NJR2903D" is it's new part number as NJR and JRC are one in the same or have merged. I thought I had a datasheet for it, but I can't seem to find it anymore
So yea, essentially wondering which would be the best one to start with. As for powering it, I could REALLY use suggestions. My plan is to spend almost nothing and use all the random parts I've salvage around here (which is amassing to be quite the assortment), with hopefully the only thing I'll need is resistors. Some of them I noticed the voltage requirements being a tad up there, I assume that ones showing -/+15V are essentially 30V components. While I have transformers around that I believe can supply, one that came out of the same component of the STK5446 was showing in the 40V area, but I have zero knowledge on how to wire up a transformer (the PCB it was on broke when I dropped the beast... oops)
Thanks again for everything!
-Clint