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SOUND CARD CIRCUIT DIAGRAM | USB SOUND CARD WITH MICROPHONE INPUT | PCM29O2 IC


USB SOUND CARD WITH PCM29O2 IC

A sound card converts digital data to sound. This allows you to listen to music from your computer using speakers or headphones.


Most of your music collection is probably in digital format, either on CDs or as files on your computer. In order to be able to listen to your music, a sound card converts digital data to analog sound waves you can hear. The output signal is then connected to a headphone or set of speakers. You can also use a sound card to record audio with a microphone.


PCM2902 Soundcard with Microphone Input


SOUND CARD CIRCUIT DIAGRAM | USB SOUND CARD WITH MICROPHONE INPUT | PCM29O2 IC



Many of us have a pair of headphones connected to the output of the computer sound card us either to enjoy songs, or a game. Very likely your headphones and microphone, which also connect to the appropriate slot your sound card. But at some point broke down the female plug my sound card, and because quite a lot to change the plug when I put the headphones and when the speakers. A small structure is a sound card, USB, with stereo inputs / outputs, button to increase / volume button for volume and mute! When connected Windows will recognize as a sound card! With all the materials to be SMD, the cornered enough and fit into a small plastic box, which by one measure has a cable with USB plug, sound to go acoustic (Left / Right) and condenser microphones. The supply of (as imagined) is done by the USB port. The heart of the integrated circuit is PCM2902 of Burr-Brown by Texas Instruments. It is stereo 16-bit DAC and ADC, fully compatible with USB 1.1. DAC sampling frequencies are 32, 44.1 and 48 kHz, ADC has 8, 11.025, 16, 22.05, 32, 44.1 and 48 kHz. If you want more sound intensity, you will need to connect TDA 7050 amplifier to audio output.



PCM2902 IC pin out

SOUND CARD CIRCUIT DIAGRAM | USB SOUND CARD WITH MICROPHONE INPUT | PCM29O2 IC


The motherboard on most computer systems has an integrated sound card, which is often sufficient for many users. However, to get higher quality sound you can upgrade to a separate sound card, which uses better and more expensive components.

Audio files on a computer consist of digital data just like any other file on a computer. Sounds we can hear consist of waves that travel through the air - sounds are analog. The primary function of a sound card is to translate between digital and analog information, just like a video card. Sound cards typically have four major components:

The digital-to-analog converter (DAC), which makes it possible to convert digital data to analog sound
The analog-to-digital converter (ADC), which makes it possible to make digital recordings from analog sound inputs

An interface to connect to the motherboard, typically using Peripheral Component Interconnect (PCI)
Input and output connectors so you can plug in headphones, speakers or a microphone - many computer systems have speakers and microphone built-in, but connectors allow you to use higher quality external devices to play or record sound


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