I have an ES89018DAC but it only has coaxial input ,I should need an optical input so that I can use Chromecast.
Is there a schema for it,tried searchin but no go..
Is there a schema for it,tried searchin but no go..
You can use advice from here, there is a small passage explaining it all CD_transport_DIY
You'll need a TORX like this http://www.mouser.com/catalog/specsheets/torx147.pdf
some resistors or variable resistors and a ceramic capacitor of 100nf or less.
From what i understand (sorry if i'm wrong) :
The signal coming from the output of TORX is TTL or SPDIF but with a bigger amplitude (in the datasheet it is 2.5Vdc so more than 1.7Vrms giving something like 5Vpp) so just place a capacitor in series (blocking DC ?) and use resistors or variable resistors to do a voltage divider to get a signal level between 0.5-1Vpp.
Then just wire this to the coaxial "in" of the dac with a switch in between to change source input and don't risk to fry the TORX if coaxial is used.
Schematic can be found here epanorama.net/S/PDIF Interface
intituled TTL to S/PDIF interface but if you want to use more advanced circuits it should also be listed there.
You'll need a TORX like this http://www.mouser.com/catalog/specsheets/torx147.pdf
some resistors or variable resistors and a ceramic capacitor of 100nf or less.
From what i understand (sorry if i'm wrong) :
The signal coming from the output of TORX is TTL or SPDIF but with a bigger amplitude (in the datasheet it is 2.5Vdc so more than 1.7Vrms giving something like 5Vpp) so just place a capacitor in series (blocking DC ?) and use resistors or variable resistors to do a voltage divider to get a signal level between 0.5-1Vpp.
Then just wire this to the coaxial "in" of the dac with a switch in between to change source input and don't risk to fry the TORX if coaxial is used.
Schematic can be found here epanorama.net/S/PDIF Interface
intituled TTL to S/PDIF interface but if you want to use more advanced circuits it should also be listed there.
The TORX devices can be hard to source in the USA. I find the Everlight PLR135/T10 works fine in this application and has the advantage of working at 3.3VDC supplies.
If you are looking for a ready made solution then I could recommend this module. I'm using it with my Subbu DAC and am so far satisfied.
Regards,
Oleg
Regards,
Oleg
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