Tír Na HiFi

My screen has given up the ghost (except for the backlight) - but still it plays out audio, mostly.

tims wrote: ↑Mon Apr 27, 2020 12:15 pm I can't find much in the way of say an I2S to S/PDIF converter

Something like this, which is used to create an S/PDIF output for a RPi would work I reckon : https://item.taobao.com/item.htm?spm=a2 ... t=4#detail

This one's using an ATS2825 - it doesn't mangle the ends of tracks like the more expensive one so I'm preferring it. So far its been the height of stability, nothing fazes it, not even pulling out the card while playing, it mutes gracefully.

Here's another Taobao offering which is considerably cheaper : https://item.taobao.com/item.htm?spm=a230r.1.14.73.5c44219c1n029o&id=542592077587&ns=1&abbucket=6#detail . This has no screen but does have a downloadable APP (Android/iPhone) which gives access to the music on the SDcard and...

I can't see how having two Rs (one on each output) to GND changes anything. Though his output voltage might be measured differentially between the two, that wouldn't change the offset, which would be zero measured between the two output pins.

He's saying that the BPZ current is 10mA, presumably by virtue of over-volting the chip and decreasing the Iref resistor (10k->6k1).

But if your I/V resistors are 135R rather than 270R you'll get half his offset voltage i.e. 1.35V not 2.72V.

Dc offsets are circa +/- 2.75v on the differential outputs at 133ohm iv Think it's either 800 to 1000mv output ac I went over to the DS to confirm - its putting out 6.2mA at BPZ, the total swing is 7.8mA. So I'd expect 800mV DC on those 135Rs and the swing is between 300mV and 1.3V so 370mV RMS. It...

Yes, that's the one. You can use J327Rs they're only slightly poorer (higher capacitance) than the J56 but you can run them hotter. I'd run the bias nice and toasty, say about 40mA to get an output impedance down below 1ohm, then use a series R (say 4.7R) to keep it stable with the parasitic capacit...

https://www.diyaudio.com/forums/diyaudio-com-wiki/250673-opcs-ntd1-project.html just thinking out aloud abrax what you think of this? I had a look at it a while back when I was designing I/V for my own DAC. While I like MOSFETs in I/V stages this one seems to waste a whole lot of power by running f...

I've got 2 270s in atm If I remember right anything between 100 and 150r seemed to work just fine Here's a LP filter which gets rid of a whole load of ultrasonic stuff. It doesn't do NOS correction - do you need that? It can be tweaked to add some HF boost to counteract the first-order hold functio...