USB Sound Card

usb sound card schematic

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

Can be used a external 5V DC power supply with this PSU circuit

AMS1117 Datasheet

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

audio amplifier NS8002 schematics

NS8002 Datasheet

PCM2702 IC

SSOP28 package requires special care while assembling.

ssop28 case
PCM2702

PCM2702 Datasheet