Texas Instruments PCM Series Audio D/A Converter ICs are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Texas. Texas Instruments PCM Data Acquisition – ADCs/DACs – Special Purpose parts available at DigiKey. PCM SPI Arduino library is a bitbang SPI implementation which makes it possible to interface with the PCM USB DAC from Texas Instruments.
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Sign up Already a member? Only some routing and adjustments left. Become a member to follow this project and never miss any updates. View all 6 project pcm705.
View all 21 components. If so, how did you go about it?
PCM2705 PCM2705DBR SSOP28 1PCS
Your Password Forgot your password? The new PCB layout is soon ready: I’m thinking about making something similar when I’m done with my current projects.
You should Sign Up. When the DAC is connected to a computer it recognizes it as a USB sound card and no manual installation of drivers is need.
USB DAC with amplifier |
I just uploaded the schematics to the Github repo as a PNG file, hope it works! It is a 3-W Stereo Class-D amp.
So i put some solder on the top side pad, put the IC on and applied heat on the bottom side. I wrote a small Arduino library so playback can easily be controlled from an Arduino. A SPI interface can pvm2705 used to control playback on the connected computer. The USB-cable i used was very loose in the connector and when i changed the cable everything was fine.
USB DAC with amplifier
I am almost done with the new schematic for the hopefully final version. Already have an account? I think a bad ground connection caused this. Did some testing and everything seems to work. Had ;cm2705 problems with the volume at first, it would change randomly when i got close to the PCB.
Become a member to follow this project and never miss any updates Become a member. I just finished soldering the components on the latest PCB. The only downside is that a external power supply is needed when volume is increased. The amplifier is capable of driving two 3 W, 8 Ohm speakers. Nice to see a mostly through hole design for this. Yes, delete it Cancel. Got the new PCB and some missing components for the new version today! Here is the new PCB compared to the old one. Similar projects worth following.
The only thing left before i start with the PCB layout is to check all footprints and recheck all connections. Any chance you could put a PDF of the schematics in the Github repo?
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It’d be nice to see them without needing a CAD tool. Many similar boards use an external DAC for better performance but since small size and cost is more importent in this project i choose the integrated DAC. U nfortunately i could only solder the USB connector before my almost new solder station broke, so now i must get a replacement before i can pcj2705. It does not show in the pictures but the thermal pad is also exposed on the bottom side of the PCB.
It’s actually not too many components.