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USB Audio Output Transmitter - University of San Diego
http://catcher.sandiego.edu/items/usdengr/USBAudio_FDR_F05.pdf
3. Audio USB Interface IC (Stereo-audio codec with USB interface – converts USB into audio signal) PCM2902E 4. Wireless Audio link IC (BH1415F) 5. FM Amplifier Circuit 6. Transmission Antenna 7. Computer with USB port 8. Board 9. Casing Work Tasks This project works for a three person team. 1. Design audio interface circuit required to interface computer and USB 2. …
USB audio dongle with PCM2912 - Pavouk
http://www.pavouk.org/hw/usbcodecpcm2912/en_index.html
Circuit diagram is practically identical to the schematicsin a datasheet. USB part of chip includes three endpoints. One control endpoint and two audiostreaming interfaces for input and output. Control part includes volume controland mute function for input, output and sidetone.
USB sound card - Electronic Circuits and Diagrams ...
https://www.circuitstoday.com/usb-sound-card
The circuit gets control data and audio data from the USB through the D+ and D- pins of the PCM2702 all the data transferring is carried out at full speed. The decoded audio signals will be available at the VOUTL and VOUTR pins of the IC. The 12MHz crystal is connected between the XT0 and XT1 pins of the IC.
USB Wiring Diagram: A Complete Tutorial | EdrawMax
https://www.edrawsoft.com/article/usb-wiring-diagram.html
USB pinout Diagram. This USB pin-out diagram shows the USB cable often connected to phones to charge them or transfer data. Type A connector is linked to the charger or PC, and a microSD connector is plugged into the phone. You can add labels to the wires, pinouts, and connectors to make your diagram more informative.
Building A ‘high-end’ USB Audio DAC | Hackaday
https://hackaday.com/2013/08/27/building-a-high-end-usb-audio-dac/
USB has lots of high-frequency blips in it, ironically a balanced signal when the audio circuits aren’t. But if you want to be clear of interference I’d say optical is …
USB Audio Simplified - Silicon Labs
https://www.silabs.com/documents/public/white-papers/usb-audio-simplified.pdf
USB is a versatile interface that provides many ways to propagate and control digital audio; however, it is important for the industry to follow a standardized mechanism for transporting audio over USB to secure interoperability, which has been the cornerstone for the adoption of USB. To respond to this fundamental request, the USB organization has developed the Audio …
URI U Radio Interface - QSL.net
https://www.qsl.net/kb9mwr/projects/voip/USB-FOB.pdf
Audio can be passed through VOIP/Ethernet. Many radios provide an interface connector for external access. These signals can be easily connected to the URI’s standard DB-25 connector. The URI contains the C-Media CM108, a high-quality full-duplex USB audio controller. One channel of receive audio is provided along with
Computer soundcard to radio interface
http://w9ou.org/wp-content/uploads/2019/04/Computer-soundcard-to-radio-interface.pdf
Simple Computer Soundcard to Radio Interface . KF5INZ Easy Digi Interface circuit board . The left part of the board is the audio input/output through 600/600 ohm transformers, the right part of the board holds the PTT circuit using the RTS or DTR pins from the RS232 computer interface.
The USBlink - a home-brew digital modes interface - G4ILO
http://www.g4ilo.com/usblink.html
The SignaLink USB Interface is a USB powered device that contains a sound card and VOX circuitry that keys the radio PTT whenever the digital mode software goes into transmit and produces audio. This avoids the need for a serial interface using a second USB port just to control the transceiver PTT, which is the bane of interfaces like the RigBlaster, and it works with just …
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