Measurements on slightly larger v1.1 boards:
- Superb performance using the best configuration, peaking at -112 dB to -114 dB THD+N
- Excellent performance using cheaper components
- Lots of changes on PCBs
Follow-up on AK4490 test board measurements
Measurements and experiments carried out on a more spacious AK4490 test board
Last year and this spring I spent a lot of free-time on DIY electronics and as my full-time job is also electronics related, I needed to take a few-month break. I just didn’t feel interested, inspired, or motivated anymore. During the time off I focused a bit more on my photography hobby. I hoped that after a break I would feel motivated to do more electronics again. While even I had my doubts, the inspiration is back! I am designing new boards again. There will be a new DAC plus addon boards; the design and ideas are based on the H-DAC. I will also try to make assembled boards available to buy at some point.
Simple USB audio interface for headset
This is an updated version of my old miniD preamp from 2014 combining miniDSP and 4-channel DAC-preamplifier
H-DAC is a high-performance 192 kHz / 24-bit capable DAC board with TI PCM1794A DAC. The board has two coaxial S/PDIF, two Toslink, and one I2S input that can be either on-board 48 kHz / 16-bit USB receiver or an external I2S-device. Input selection and settings are controlled with jumper links that can be replaced by mechanical switches or microcontroller addon board.