Home-produced USB Sound Card

In this project I’m build USB sound card using single chip and it produce good audio output and compatible with Windows 9x operating systems and Windows NT family operating systems (I am not tested this circuit with Windows Vista and chip manufacturer say it is worked with Mac OS also) This is a plug and Play device and device driver is not required. Special feature of this sound card is its built-in HID controller. Using this HID controller user may be able to control Windows Volume control using 3 buttons located on the sound card. These buttons are used for Volume Up, Volume Down and for Audio Mute.

This device is based on Burr-Brown’s PCM2904 USB CODEC chip and it produces stereo output. PCM2904 operates using USB power (self powered) and external power adapter is not required.

I think this device is ideal for USB headphones or mini-speaker modules. My implementation is 10x9 cm. I spend Sri Lankan Rs. 1500 for this circuit.

Comments

clee1 said…

I would be very interested in your schematic; the one contained in the data sheet did not answer all my questions, specifically as regards to HID functions. I am planning to use the pcm2904 in a PC-to-Ham Radio tranciever interface for use with digital radio modes.

September 30, 2008 at 10:43 AM

Dilshan Jayakody said…

I’m use the schematic available in datasheet with some minor modifications (specially in audio output section to match the impedances) To send the exact schematic first I need to draw it, and it is bit time consuming, but if you need it I’m draw and send it to you. Please drop me some mail. (jayakody2000lk@gmail.com)

October 6, 2008 at 7:45 AM

Anonymous said…

woww

June 14, 2010 at 7:14 PM

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