Battery power for New Buffalo dac Options  Watch this topic  Print this topic  Atom Feed  RSS Feed View » Normal Threaded

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deepgroove		#1 Posted : Sunday, April 19, 2009 4:35:21 PM(UTC)
Rank: Member Groups: Member Joined: 2/5/2009(UTC) Posts: 4 Location: New Jersey		Greetings, I want to run the new dac for 2-3 hours at a time on a 6v and 12v battery. What size battery would work 8ah 12ah? Thanks
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Russ White		#2 Posted : Sunday, April 19, 2009 6:45:35 PM(UTC)
Rank: Administration Groups: Administration, Customer Joined: 10/24/2006(UTC) Posts: 3,979 Location: Nashville, TN Thanks: 25 times Was thanked: 89 time(s) in 83 post(s)		I should think either would be fine. :) Total current draw will only be about ~200ma. But you will want two 12V batteries for the analog supplies. One 6V battery for the digital supply should work ok. Cheers! Russ Edited by user Sunday, April 19, 2009 8:17:06 PM(UTC)  | Reason: Not specified
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dan631		#3 Posted : Monday, April 20, 2009 9:59:23 AM(UTC)
Rank: Member Groups: Member Joined: 1/19/2009(UTC) Posts: 8 Location: Canada		Would there be any benefit to using the power supply boards between the battery and dac for pre-regulation?
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Russ White		#4 Posted : Monday, April 20, 2009 10:04:18 AM(UTC)
Rank: Administration Groups: Administration, Customer Joined: 10/24/2006(UTC) Posts: 3,979 Location: Nashville, TN Thanks: 25 times Was thanked: 89 time(s) in 83 post(s)		Probably not for the analog stages, but for the digital supply it would be helpful to pre-regulate down to 5V.
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dan631		#5 Posted : Wednesday, April 22, 2009 11:17:40 AM(UTC)
Rank: Member Groups: Member Joined: 1/19/2009(UTC) Posts: 8 Location: Canada		Russ, you said to use two batteries for the analog supplies; do you mean one for the + and one for the - rails?
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Russ White		#6 Posted : Wednesday, April 22, 2009 8:30:49 PM(UTC)
Rank: Administration Groups: Administration, Customer Joined: 10/24/2006(UTC) Posts: 3,979 Location: Nashville, TN Thanks: 25 times Was thanked: 89 time(s) in 83 post(s)		dan631 wrote: Russ, you said to use two batteries for the analog supplies; do you mean one for the + and one for the - rails? Yes :)
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deepgroove		#7 Posted : Sunday, May 17, 2009 4:53:00 PM(UTC)
Rank: Member Groups: Member Joined: 2/5/2009(UTC) Posts: 4 Location: New Jersey		How would you hook up a second battery for the negative supply?
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Russ White		#8 Posted : Monday, May 18, 2009 8:09:32 AM(UTC)
Rank: Administration Groups: Administration, Customer Joined: 10/24/2006(UTC) Posts: 3,979 Location: Nashville, TN Thanks: 25 times Was thanked: 89 time(s) in 83 post(s)		Two batteries in series make a bipolar supply (+ and -) the mid point where the two batteries "+" and "-" join is 0V or GND.
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dan631		#9 Posted : Monday, May 18, 2009 12:07:47 PM(UTC)
Rank: Member Groups: Member Joined: 1/19/2009(UTC) Posts: 8 Location: Canada		How should bypass caps be placed when using batteries like this?
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