USB Sound Card
![usb sound card schematic](../../english/schematics/USB-sound-card.webp)
Power Supply
- +5V DC from the USB port using a +5V DC regulator (LDO).
- +3.3V DC from the USB port using a +3.3V DC regulator (LDO).
![DUAL PSU 5V 3.3V from USB](../../english/schematics/PSU-5v-3.3V-USB_900.webp)
Can be used a external 5V DC power supply with this PSU circuit
Audio Output
Audio signals (output), requires amplification to connect other devices, audio pre-amplifier or amplifier. Speaker direct use can be made with NS8002
2. 4W(RL=4Ω,THD=10%)3-5V DC P.S
PCM2702 IC
SSOP28 package requires special care while assembling.
![ssop28 case](/circuitos/en/../../english/schematics/ssop28.webp)
![PCM2702](/circuitos/en/../../english/schematics/pcm2702.jpg)