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Ian asynchronous I2S and S/PDIF FIFO KIT group buy

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#3,481
ofswitched said:
The charging current quality does not need to be too good, the amount of current is important. It is recommended to use a more efficient switching power supply. Generally, the linear power supply current will be smaller and consume a lot of power.
Click to expand...

You may have missed the point... @Miklau is not using the Salas 1.3 UtraBiB power supply for CHARGING i.e. supplying DC voltage to a battery or accumulator.
 
#3,482
Started putting mine together today, no Kapton in sight.

32827919797_85cd0e33dc_b.jpg
 
#3,483
@sq225917, looks very nice, but a bit risky. Be careful!



paoloilpizzo said:
<SNIP>...
"Sound quality can be improved right away by replacing the pre-installed op amplifiers with higher grade ones. OPA1622 would be recommended for U3. ..."

<SNIP>

but the OPA1622 seems to have only a 10 pins layout
http://www.ti.com/lit/ds/sbos727b/sbos727b.pdf

So, in which way I can substitute the original NJM2114D with this OPA1622?

Does it exist a different version of OPA1622 with only 8 PIN layout ?
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Ian's adapter for the OPA1622 handles this and turns it into an 8-pin equivalent.


paoloilpizzo said:
Another question: did u tested also other OpAmp ? Eg. The DualAmp BursonAudio V6 Classic seems to be compatible. Did u test it or do you know it ?
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I've tried both the Sparkos and LKS discrete opamps in the I/V positions (U1 & U2) with very good results. I am leaning more towards the Sparkos, but don't have suffiicent time on both for anything final.

I've seen some good reports on the Burson too. Opamp choice will largely be a personal preference choice.

In my testing I am running the setup into a balanced-input attenuator and amplifier. So I don't have U3 populated with anything at this time.

Greg in Mississippi
 
#3,484
Greg Stewart said:
Ian's adapter for the OPA1622 handles this and turns it into an 8-pin equivalent.
...
In my testing I am running the setup into a balanced-input attenuator and amplifier. So I don't have U3 populated with anything at this time.

Greg in Mississippi
Click to expand...

The adapter for 1622 has to be soldered ? Is it difficult?

The U3 is used for un-balanced output?
This means that the U1 e U2 are used only for balanced and so in case I want to use only un-balanced I may let them empty (so do the opposite you are doing) ?
 
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#3,485
@paoloilpizzo,

I haven't soldered an OPA1622 to one of Ian's adapters yet, but it IS an advanced SMD soldering job that requires an SMD rework station at least or a proper SMD soldering oven.

OPA1612s & most other recent equivalent opamps also require soldering onto appropriate adapters and are still challenging SMD soldering jobs, but they CAN be done with a very fine-tip soldering iron by hand.

Also, U1 & U2 are required for both balanced & single-ended use. Only U3 is optional and then only for single-ended use.

Greg in Mississippi
 
#3,489
sq225917 said:
Guys, I have a laptop smps putting out 19.4v off load. Alright to use with the lifepo board?
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From the manual

J6: DC power input connector alternative to J5

A 12V to 19V DC power supply with rated current higher than 3.5A can also be connected to this 2-pin 5.0mm terminal

to operate. It’s internally connected to J5.

So seems to be just a bit over the limit. Imho could be used by I let the last sentence to Ian.
 
#3,500
iancanada said:
HDMIpi works together with FifoPi through u.fl cables to MCLK and I2S/DSD/DoP

Becomes an ultra low jitter HDMI transport.


HDMIpiFifoPi by Ian, on Flickr
Click to expand...

Great! I was waiting long time for such board. I was even willing to delay the shipping of my boards for this as , at the moment I'm more intrested in a digital transport project for my external dac. Great to see it ready.

Have a well deserved nice vacation Ian!
 
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