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TRAXMOD
Digital Audio Player for Microchip DSPs and Philips LPC2103 ARM7TDMI-S
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Archived News
11-25-2007
The audio board might then look something like the diagram to the right.
One 3.5mm audio connector would be for audio out, while the other for
audio in. Two MCP6004 op-amps provide low pass filtering for the audio out,
and line drive for the audio in. I'm not sure about the switch, maybe it
would be an on/off switch or maybe it could serve some other purpose.
Maybe I should put some buttons on here, or maybe those should
go on a third board? I kind of feel like user interface stuff should go
on a separate board covering the entire surface area, including battery area.
If I had a battery charger circuit, maybe it could go in unused space
on the audio board? Haven't worked out all the details yet.