Advice Needed - Power supply for Ack! dAck!

TonyDasilva · 16th July 2005, 04:43 PM

I have an Ack Industries dAck! (non-oversampling DAC) and like the music it produces but the battery power supply is driving me nuts. I would like to put together a power supply that I can plug in or at least source my own batteries so I don't have to send away to Ack industries every time I need a new battery (about once every 12-18 months). Basically I am a DYI noob

so not sure where to start. Can anyone offer any advice?

Thanks!

Tony

Elso Kwak · 16th July 2005, 08:30 PM

Hi, You just need a raw supply for digital and analog section consisting of mains transformer, bridge rectifier and supply capacitors. Please see Horowitz "The Art of Electronics" or any other electronics Handbook.

dsavitsk · 17th July 2005, 12:50 AM

I am set up using a basic transformer -> rectifier -> smooothing cap (2200uF) -> LM317 -> couple of small film caps (1uF, 0.1 uF). This is pretty easy, though there is clearly room for improvement. I am going to try some extra output caps as dynamics are suffering a bit. Also, I am running 8 chips in parallel, and this seems to be straining the transformer, so I am about to replace it with a bigger one.

I am told, however, that a battery (or even better, a battery with a cap across the terminals) is a great option. Whether this works will depend upon whether your DAC needs a very specific voltage (and you can find a battery of that size) or whether it can take a range.

-d

16th July 2005, 04:43 PM	#1
TonyDasilva diyAudio Member Join Date: Jul 2005 Location: The big easty	Advice Needed - Power supply for Ack! dAck! I have an Ack Industries dAck! (non-oversampling DAC) and like the music it produces but the battery power supply is driving me nuts. I would like to put together a power supply that I can plug in or at least source my own batteries so I don't have to send away to Ack industries every time I need a new battery (about once every 12-18 months). Basically I am a DYI noob so not sure where to start. Can anyone offer any advice? Thanks! Tony

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16th July 2005, 08:30 PM	#2
Elso Kwak Banned Join Date: Dec 2001 Location: Zamboanga, City of Flowers, Mindanao	Hi, You just need a raw supply for digital and analog section consisting of mains transformer, bridge rectifier and supply capacitors. Please see Horowitz "The Art of Electronics" or any other electronics Handbook.

17th July 2005, 12:50 AM	#3
dsavitsk diyAudio Member Join Date: Jan 2005 Location: Chicago	I am set up using a basic transformer -> rectifier -> smooothing cap (2200uF) -> LM317 -> couple of small film caps (1uF, 0.1 uF). This is pretty easy, though there is clearly room for improvement. I am going to try some extra output caps as dynamics are suffering a bit. Also, I am running 8 chips in parallel, and this seems to be straining the transformer, so I am about to replace it with a bigger one. I am told, however, that a battery (or even better, a battery with a cap across the terminals) is a great option. Whether this works will depend upon whether your DAC needs a very specific voltage (and you can find a battery of that size) or whether it can take a range. -d