The easiest thing you can do to get it to switch on is to buy a transformer with 2 secondaries, each at 7-8VAC.
Go here: https://hifiduino.wordpress.com/2015/03/16/soekris-dam-1021-r-2r-dac-users-guide/ and read up on the "POWER CONNECTION" section.
Go here: https://hifiduino.wordpress.com/2015/03/16/soekris-dam-1021-r-2r-dac-users-guide/ and read up on the "POWER CONNECTION" section.
Thanks dimdim this is slowly starting to make sense. Sadly my transformer is 12v AC on both secondaries so I would have to buy a new one if I wanted to use AC.
I've found one article in all my searching that talks about using standard dc adapters to power the dam:-
randytsuch's audio page: Soekris R2R Dam DAC
but without seeing pictures for me it's just guesswork. I would guess that you take the + from one of the plugs and - from the other. The second connection on each is the ground?
My other option is to use a regulator with my toroidal. The only picture that I found that makes sense to me is this one:-
0.8uV Ultralow noise DAC power supply regulator +-9/12/15V 1.5A*x2 - DIYINHK
2 inputs and 1 output.
Thing is I already have 2 regulators from a guy on this forum. This is the manual for them:-
https://www.dropbox.com/s/c2iifgt11q7vaem/tps7a4700_manual_single_only.pdf?dl=0
I suspect that I bought 2 thinking that I'd use each on a different output one for the dam one for a raspberry pi. So like the dc plugs could I take the + from one and - from the other and use the other connectors as grnd?
I've found one article in all my searching that talks about using standard dc adapters to power the dam:-
randytsuch's audio page: Soekris R2R Dam DAC
but without seeing pictures for me it's just guesswork. I would guess that you take the + from one of the plugs and - from the other. The second connection on each is the ground?
My other option is to use a regulator with my toroidal. The only picture that I found that makes sense to me is this one:-
0.8uV Ultralow noise DAC power supply regulator +-9/12/15V 1.5A*x2 - DIYINHK
2 inputs and 1 output.
Thing is I already have 2 regulators from a guy on this forum. This is the manual for them:-
https://www.dropbox.com/s/c2iifgt11q7vaem/tps7a4700_manual_single_only.pdf?dl=0
I suspect that I bought 2 thinking that I'd use each on a different output one for the dam one for a raspberry pi. So like the dc plugs could I take the + from one and - from the other and use the other connectors as grnd?
hmm the more I read about hooking up 2 dc power supplies the less I like the idea. I think you're right that just using a/c straight is probably best. I've found this transformer pretty cheap:-
MCFM50/07 Multicomp Mini-Toroidal , 5Va 2X 7V | eBay
However if I'm messing about with mains anyway I may as well try and using the toroid that I bought so I'd appreciate your advice on whether I can use the 2 regulators I posted details of to make a bipolar output without killing myself.
MCFM50/07 Multicomp Mini-Toroidal , 5Va 2X 7V | eBay
However if I'm messing about with mains anyway I may as well try and using the toroid that I bought so I'd appreciate your advice on whether I can use the 2 regulators I posted details of to make a bipolar output without killing myself.
I don't quite understand what or how the connections are supposed to work on those regulators you bought in order to get a positive or negative rail output. The regulator that is used is only able to output positive rail voltage.
Which Raspberry pi do you have? Those regulators are only good for current up to 1A. Raspberry Pi 3 requires more than that for operation.
So I don't think these regulators will work for what you want to do.
I'm now not wanting to use them for the pi, only for powering the dam because I think I will need both. One for - 12v one for + 12v
Code:
j1
--- feed 1 12v a/c -> tsp7a reg --> [+12v dc]
---mains ac 230v --> toriod trans [grnd]
--- feed 2 12v a/c -> tsp7a reg --> [grnd]
[-12v dc]
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Does anyone know how much power just the input board requires? I plan to power the Pi separately. So I am going to power the DIYinHK multichannel USB to I2S card and the input board together at 3.3V. The USB to I2S card would like 800mA. The input board from what I can determine is powering the isolator and the Muxer. How much can that take 50mA?
hope this is the right place for my question?
I (would like to
) use a Soekris together with the input/switch/connector-boards and a PI3.
My problem is – there no sound.
Just the power leds (on DAM and on the switch board) are flashing. When I connect my tv directly to the spdif input, everything is fine – the leds stop flashing and music is playing.
The soekris is powered with +-9V power, the input-board with 8V. The Resistor R3 is removed and the PI is powered with 5V via the +5V OUT connector (+ is Pin 1). Jumpers for LED-Enable and EXT-Power are closed. Toslink and Coax inputs are mounted.
Seems like there is an bug in my setup … but where?
I (would like to
) use a Soekris together with the input/switch/connector-boards and a PI3.My problem is – there no sound.
Just the power leds (on DAM and on the switch board) are flashing. When I connect my tv directly to the spdif input, everything is fine – the leds stop flashing and music is playing.
The soekris is powered with +-9V power, the input-board with 8V. The Resistor R3 is removed and the PI is powered with 5V via the +5V OUT connector (+ is Pin 1). Jumpers for LED-Enable and EXT-Power are closed. Toslink and Coax inputs are mounted.
Seems like there is an bug in my setup … but where?
Power connections seem OK.
Do you have the input LEDs connected?
Does it indicate correctly?
What input does the Soekris DAC think is playing?
Is the pi the only I2S source you have?
Did you install the jumper on the switch board to select the pi input instead of the USB one?
Check the voltage on RPi GPI022 pin.
Sounds like you are on the auto selection setting which will not select the Pi unless the switchboard jumper has been installed (Page 8 of PDF).
Do you have the input LEDs connected?
Does it indicate correctly?
What input does the Soekris DAC think is playing?
Is the pi the only I2S source you have?
Did you install the jumper on the switch board to select the pi input instead of the USB one?
Check the voltage on RPi GPI022 pin.
Sounds like you are on the auto selection setting which will not select the Pi unless the switchboard jumper has been installed (Page 8 of PDF).
I think those are only for USB to I2S converters. Not sure they have any purpose if you don't have a USB to I2S converter connected.
Not sure. What changed from you previous reading?
I would solder the C1 and C5 pins together. Then use serial control on the dam 1021 to switch to I2S input. See if you get any sound. If you do then the issue is narrowed down to the switchboard. Check pin 22 again for voltage.
@wcwc, have you had any luck getting your RPi working with your dam1021 via the Normunds board?
I have a webpage that is a work-in-progress, trying to cover all the bases for getting the dam1021 to work with an RPi: HOWTO: Soekris dam1021 DAC and MPD on Raspberry Pi. It's not complete or comprehensive; I haven't had time to mess with my dam1021's in a while.
But, the first thing that comes to mind in your setup: are you using the input selector switch (for the Normunds board)? Given that you want to switch inputs via serial control, I'm assuming you're not using that. If this is indeed the case, you have to set the I2S select pin. I documented this on my wepage (linked above) and also discussed it in this thread, around post #505.
If the status LED on your Soekris board is flashing, that means there is no signal lock. First try setting the I2S select pin correctly, per above. If that still doesn't work, you may have to force MPD to output 32bit data (as that is all the Soekris will lock to). See where I asked about this in the big thread, in post #6525, and the next post where Dimdim shows how to force 32-bit output in MPD.
For serial-port based input select, take a look at the dam1121 manual, page 8. (Yes, this is the 1121 manual, but the serial commands are the same for the 1021.) In particular, just send Ix (that's a capital 'i'), where x is 0, 1, or 3. 0=USB input, 1=SPDIF, 3=auto.
I mention it in my webpage, but it's worth taking a look at the dam1021 python serial library. It implements all the dam1021 serial functionality in an easy-to-use Python library and command-line tool.
Hope that helps!
I have a webpage that is a work-in-progress, trying to cover all the bases for getting the dam1021 to work with an RPi: HOWTO: Soekris dam1021 DAC and MPD on Raspberry Pi. It's not complete or comprehensive; I haven't had time to mess with my dam1021's in a while.
But, the first thing that comes to mind in your setup: are you using the input selector switch (for the Normunds board)? Given that you want to switch inputs via serial control, I'm assuming you're not using that. If this is indeed the case, you have to set the I2S select pin. I documented this on my wepage (linked above) and also discussed it in this thread, around post #505.
If the status LED on your Soekris board is flashing, that means there is no signal lock. First try setting the I2S select pin correctly, per above. If that still doesn't work, you may have to force MPD to output 32bit data (as that is all the Soekris will lock to). See where I asked about this in the big thread, in post #6525, and the next post where Dimdim shows how to force 32-bit output in MPD.
For serial-port based input select, take a look at the dam1121 manual, page 8. (Yes, this is the 1121 manual, but the serial commands are the same for the 1021.) In particular, just send Ix (that's a capital 'i'), where x is 0, 1, or 3. 0=USB input, 1=SPDIF, 3=auto.
I mention it in my webpage, but it's worth taking a look at the dam1021 python serial library. It implements all the dam1021 serial functionality in an easy-to-use Python library and command-line tool.
Hope that helps!
Matt,
Not yet. I have to order my Dam 1021's first.
Deimsch was using the input selector switch. I have the board and could use it, but took my build in a slightly different direction. I plan to put in an arduino and control 3 Dam1021 and 3 Tortuga preamp boards with a front LCD. I will either use a RPi 3 or an Odroid C2 into the input board. I will try them both out and pick out my favorite. I would like to connect the RPi via I2S for 2 channel, but also use a DIYinHK multichannel USB to I2S converter to run multichannel I2S to all 3 Dam 1021 so I can do 5.1. The outputs from the Dam 1021s will go to the Tortuga V25 boards for volume control. One of the Dam1021s will be connected to the input board and be for 2 channel/front multichannel use. This Dac's output goes through the Tortuga board and into a Hypex DLCP for DSP for 3 way speakers.
So basically I needed a controller that could interface with different boards. So I will start with DimDim's arduino code and go from there for the integrating the Totuga boards. The Hypex DSP shouldn't need any control. So I basically created a combination Preamp/DAC/DSP/Streamer for combined 2 channel and multichannel use.
Thanks for the resources. I will take a look at them to try to figure things out.
Not yet. I have to order my Dam 1021's first.
Deimsch was using the input selector switch. I have the board and could use it, but took my build in a slightly different direction. I plan to put in an arduino and control 3 Dam1021 and 3 Tortuga preamp boards with a front LCD. I will either use a RPi 3 or an Odroid C2 into the input board. I will try them both out and pick out my favorite. I would like to connect the RPi via I2S for 2 channel, but also use a DIYinHK multichannel USB to I2S converter to run multichannel I2S to all 3 Dam 1021 so I can do 5.1. The outputs from the Dam 1021s will go to the Tortuga V25 boards for volume control. One of the Dam1021s will be connected to the input board and be for 2 channel/front multichannel use. This Dac's output goes through the Tortuga board and into a Hypex DLCP for DSP for 3 way speakers.
So basically I needed a controller that could interface with different boards. So I will start with DimDim's arduino code and go from there for the integrating the Totuga boards. The Hypex DSP shouldn't need any control. So I basically created a combination Preamp/DAC/DSP/Streamer for combined 2 channel and multichannel use.
Thanks for the resources. I will take a look at them to try to figure things out.