Well I got it working. I flipped it around and ran the BIII 3.3V to the input side of the isolator & the Arduino 5V to the output side & made sure I had the SCL & SDA lines connected in the right place.
Of course there's always an issue, once the Arduino & BIII where electrically isolated, I got a low level noise thru the speakers that wasn't there before.
The noise goes away if I link BIII & Arduino main ground points.
Of course there's always an issue, once the Arduino & BIII where electrically isolated, I got a low level noise thru the speakers that wasn't there before.
The noise goes away if I link BIII & Arduino main ground points.
yup, ground loop. sounds like you have to trace your setup connections out and see where it might be
Would this regulator work fine instead of the ADP150?
Linear Regulator (LDO) - Single Channel LDO - TPS79133-Q1 - TI.com
Linear Regulator (LDO) - Single Channel LDO - TPS79133-Q1 - TI.com
Finished the S02 board, there are two 3.3V headers on the board, can anyone advise which one is for DAC side and what is the purpose for the other one?
bigpandahk,
Are you inputting 5V on J6? Both 3.3V headers are for the DAC side.
Do you have the schematic, it shows J4/J5 connected together. Check with a meter if they're connected ...
Chris
Are you inputting 5V on J6? Both 3.3V headers are for the DAC side.
Do you have the schematic, it shows J4/J5 connected together. Check with a meter if they're connected ...
Chris
Thanks qusp.
The 5V and the middle 3.3V are the isolated side and either one shall be powered by the DAC.
another 3.3V is from Amanero, am I correct?
The 5V and the middle 3.3V are the isolated side and either one shall be powered by the DAC.
another 3.3V is from Amanero, am I correct?
Oh, both are for DAC side. Thanks hochopeper.
I don't have the schematic, where can I find it?
One more question : I understand the RCLK is for reclock and I will connect it to i570 MCLK. How about for async mode? shall I connect the RCLK to MCLK of the isolator?
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Ask Acko for a copy of the schematic ...
I'm not sure what you mean by the last question??
For re-clocking in sync mode, I will connect the i570-MCLK to the RCLK of the isolator.
If run in Async mode, do I still have to provide clock for the FF? is is just connect the MCLK (I believe it's from Amanero) on the isolator board to the RCLK?
If run in Async mode, do I still have to provide clock for the FF? is is just connect the MCLK (I believe it's from Amanero) on the isolator board to the RCLK?
Regarding CKSEL, i know SPDIF uses recovered clock - but is there any SPDIF-reciever that can output something that can be used as CKSEL?
I know this is a bit OT but I was interested to know what you guys thought was the most appropriated wire gauge for:
1) Signal wire, say from DAC to RCA's etc
2) Hookup wire, say from the isolator to DAC or arduino to other component.
3) Internal Speaker wire say from, Amp to speaker terminals
4) General low voltage say 3.3v to 12v power supply wire.
1) Signal wire, say from DAC to RCA's etc
2) Hookup wire, say from the isolator to DAC or arduino to other component.
3) Internal Speaker wire say from, Amp to speaker terminals
4) General low voltage say 3.3v to 12v power supply wire.
Wire gauge is probably less significant here than capacitance and signal/return/shield geometry for electric and magnetic field rejection.
22 or 24awg is what I end up using though I guess, though I don't think about that so much.
If we're talking power lines, whatever is closest, for signal wires, it depends on the signal, for low freq signal like i2c, still whatever is closest and fits in the PCB hole or crimp connector whichever the case may be.
Depends on speaker efficiency, amp supplying compression driver vs a 4ohm low efficiency midwoofer(s) would probably demand different wire gauge. 14awg would probably cover most practical cases though off the top of my head.
See 2 above. Unless it is wire for a battery charger, then I'd think about it a bit more since they can have a few amps going down them. For anything less than an amp I don't fuss too much.