Thank you Blitz for confirming the delivery! Regarding the 3.3V supply, I would suggest to use a separate one (something like Paul Hynes, Belleson, etc) and placed it as close to the isolator as possible (with short wires!). Moreover, make sure that I2S connections have the same length and are as short as possible. Feel free to use external USB input @ J1 and move WaveIO close to your DAC board to achieve this.
Cheers,
L
Cheers,
L
@henri47
The voltage seen on the isolator chip V+ pin will be used as the logic 'high' state. So first thing to check is if the BIII ess9018 chip tolerant to 5V logic? I haven't got a BIII so you'd be best consulting the ESS datasheet for that answer. Most I2S lines are 3.3V from my limited experience.
Ideally you would have a separate 3.3V regulator for the NVE chip.
You may be able to get away with using the 3.3V from BIII without too much compromise but I'm not sure what else the 3.3V regulator(s) is supplying on that DAC, I know they supply multiple parts of the es9018 chip from a trident single shunt regs on that DAC but I haven't looked in enough detail to know which parts are combined.
The voltage seen on the isolator chip V+ pin will be used as the logic 'high' state. So first thing to check is if the BIII ess9018 chip tolerant to 5V logic? I haven't got a BIII so you'd be best consulting the ESS datasheet for that answer. Most I2S lines are 3.3V from my limited experience.
Ideally you would have a separate 3.3V regulator for the NVE chip.
You may be able to get away with using the 3.3V from BIII without too much compromise but I'm not sure what else the 3.3V regulator(s) is supplying on that DAC, I know they supply multiple parts of the es9018 chip from a trident single shunt regs on that DAC but I haven't looked in enough detail to know which parts are combined.
Thanks. My BIII DAC needs TTL level signals on his inputs. I'm using the DAC with the WaveIO card in the way I described in post #922. At first I used the micro BNC connectors, but due to the vulnerability of these tiny conductors I now use the isolated I2S chip on WaveIO. Both seems to work without any problem with the same sound quality. To get isolation would it be best to power the NVE chip with his own PS and own transformer?
kind regards,
Henri
kind regards,
Henri
@henri47: hochopeper is saying better than me. Even if I have a copy of ES9018 datasheet I can see in "Absolute Maximum Ratings" table that you can apply max 5.5V on 5V tolerant pins. Well, I didn't find yet which are those pins! From my experience with other chips, it should be the data input signals (in ES9018 case) but, for the sake of safety, I would suggest to take a separate 3.3V regulator and feed the output side of isolator with it.. using short wires.
Cheers,
L
Cheers,
L
Whatever is the best (from SQ point of view) 
Anyway, for testing purposes I would start with Placid. A separate PS (trafo + rectifiers + caps) will be overkill for the moment but you can try it later if you wish!
I do not know Placid very well and where is connected in your system but make sure that this new 3.3V reg will not kill it by sinking too much current.
Kind regards,
L
Anyway, for testing purposes I would start with Placid. A separate PS (trafo + rectifiers + caps) will be overkill for the moment but you can try it later if you wish! I do not know Placid very well and where is connected in your system but make sure that this new 3.3V reg will not kill it by sinking too much current.
Kind regards,
L
3,3 Volt supply
Hi,
i use the board with buffalo II and supply it with external 5Volt via regulated (thel regulator from germany) Lipofer batteries (2x3,3=7,4) and supply the isolator with two Lipofers in parallel mode.
The batteries for the isolator needs charging only all 5 or 6 days.
Sound is superb and the charging of the lipos is very simple.After charging they stay very constant at 3,3 Volt.
Each rail of the buffalo is fed also by separate Lipofer batteries, so there is nowhere a ground problem.
Happy trial and error
Alfred
Hi,
i use the board with buffalo II and supply it with external 5Volt via regulated (thel regulator from germany) Lipofer batteries (2x3,3=7,4) and supply the isolator with two Lipofers in parallel mode.
The batteries for the isolator needs charging only all 5 or 6 days.
Sound is superb and the charging of the lipos is very simple.After charging they stay very constant at 3,3 Volt.
Each rail of the buffalo is fed also by separate Lipofer batteries, so there is nowhere a ground problem.
Happy trial and error
Alfred
@henry
i can compare the sound quality of the placid versus 4 separate lipos at 3.3 and separate 1,2 Volt for the buffalo.THE lipos are in an other league soundwise.
The waveIO I started with the Lipos from the beginning.
In general i can say that everytime i changed conventional shunt supplies to Lipos it bettered the sound.
If you use them in paralleled mode you can get extreme low ESR.
i can compare the sound quality of the placid versus 4 separate lipos at 3.3 and separate 1,2 Volt for the buffalo.THE lipos are in an other league soundwise.
The waveIO I started with the Lipos from the beginning.
In general i can say that everytime i changed conventional shunt supplies to Lipos it bettered the sound.
If you use them in paralleled mode you can get extreme low ESR.
@henry
i can compare the sound quality of the placid versus 4 separate lipos at 3.3 and separate 1,2 Volt for the buffalo.THE lipos are in an other league soundwise.
The waveIO I started with the Lipos from the beginning.
In general i can say that everytime i changed conventional shunt supplies to Lipos it bettered the sound.
If you use them in paralleled mode you can get extreme low ESR.
i can compare the sound quality of the placid versus 4 separate lipos at 3.3 and separate 1,2 Volt for the buffalo.THE lipos are in an other league soundwise.
The waveIO I started with the Lipos from the beginning.
In general i can say that everytime i changed conventional shunt supplies to Lipos it bettered the sound.
If you use them in paralleled mode you can get extreme low ESR.
Thanks for the link. I think it's really worthwhile to consider your solution. It would rule out nearly all powergrid related problems. An internal or external charger could be switched on when DAC has been powered off. mmm...
I think I'll start powering the WaveIO with lipo's.
kind regards,
Henri
I think I'll start powering the WaveIO with lipo's.
kind regards,
Henri
The open source audio widget thread also has some discussion of using batteries to power the widget, but the setup should be similar to the waveio. Also using a switch to choose between playback and charging.
http://www.diyaudio.com/forums/digi...sb-interface-audio-widget-36.html#post2782318
http://www.diyaudio.com/forums/digi...sb-interface-audio-widget-36.html#post2782318