Just came back from vacation! Back to cold snowy Boston.
Mounted the amplifier. Decided to mount it at a slight angle to give more room to the heatsink on the chip:
I also ordered several 4x2 pin female header connectors to connect the speakers. I went a bit overboard and used shielded 22 gauge cable. It works great but the cables are way too bulky. Tomorrow, I'll try regular speaker cables.
D201GLY2, DC-DC power, 3.5 inch SATA
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i thought that amp chip required a external heatsink?
i'm also curious on your impressions on the sound quality of that amp once you get it all setup..
I bought the amp preassembled and had the impression that it did not require any other parts. It has a copper plate on the back, but it's smooth and doesnt have heatsink fins on it. That part gets pretty damn hot - too hot to touch. I did look up the specs and it says that working temperature range is 130+ C. Still concerning though.
As far as sound quality goes, I'd say it's pretty good. I don't have a good speaker set to hook it up to, but after using shielded cables, I had very little hiss coming from the speakers when the amp was on (you can only hear it if you put your ear right next to it). I gotta say I'm not too big on sound quality as long as it's decent. For my taste, I think it's more than enough. Still, it's hooked up to a clean 12V source right now. I'll let you know once I power it from the ACC line. I also wonder how the quality will hold up when I switch from shielded cables to non-shielded ones.
Trying to figure out the Mini Din pinout of the Mini Touch monitor:
I can't seem to figure out the purpose of the Orange connection. It used to be Monitor ID line, but Wikipedia advises not to use it.
Now I need to convert this to a DVI-A pinout and I'm in business
The fact that the heatsink doesn't come already attached is why I suspect it needs an external heatsink...meaning: you need to add on one!!! You just glue one to it like you would a processor.
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i started looking at digikey, but don't know the max area you can use.
the bigger, the better. and what ever option you choose, make sure to use thermal paste/adhesive to bond it to the chip, so that the heat can get effectively transferred off the amp chip-set.
a good design should only get hot to the touch after at least an hour of very hard use..
Right. Arctic (of arctic silver 5 fame) makes thermal paste epoxy which I think is perfect for this kind of thing. I need a small heatsink that bends at a 90 degree angle though, so I might have to make one myself - a sheet of copper or aluminum would do.
hmm, i don't know if a sheet of any material is enough.
i was thinking outside the box-- literally.. cut out the area just around the chipset, and that would allow better airflow to the heatsink, and would also allow a larger, more solid heatsink..
the thicker the heatsink, the more area the heat has to move into to keep the heat out of the chipset-- just like a pc processor, just without a program to see how it's doing..
yeah I'm gonna look around for 90-degree heatsinks with heatpipes. I'll have 2 40mm fans sucking the air out right above it so I think that should help.
In other news, my experiment of soldering a custom cable has failed so far. I've connected R G B HSync VSync Ground to the DVI connector but the monitor isn't coming on. Unfortunately, I destroyed my VGA-DVI-a cable I got from monoprice so I can't verify VGA-DVI pinout, but I googled around and I thought it's pretty easy. The only pin I'm not sure about is the Orange pin (5 posts above) - maybe that has to be connected? If you guys have a solid idea about DVI-a pinout, please let me know - I could use some help.