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Author Topic: DAP1 battery question  (Read 4804 times)

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Offline Jason R

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DAP1 battery question
« on: July 30, 2004, 03:06:10 PM »
Can I power a DAp1 with a 12 volt. 
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Re: DAP1 battery question
« Reply #1 on: July 30, 2004, 03:07:17 PM »
if you regulate it down to 6

Offline Craig T

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Re: DAP1 battery question
« Reply #2 on: July 30, 2004, 03:23:09 PM »
I believe it really wants 7.5V, but will operate on 6-8.  Not 12, though.
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Offline nic

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Re: DAP1 battery question
« Reply #3 on: January 22, 2005, 07:28:35 PM »
I believe it really wants 7.5V, but will operate on 6-8.  Not 12, though.

the DAP1 will run on a 6v?


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Offline leegeddy

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Re: DAP1 battery question
« Reply #4 on: January 22, 2005, 07:33:16 PM »
I believe it really wants 7.5V, but will operate on 6-8.  Not 12, though.

da-p1 will run safely at 13.5v. i run mine on 12v. even the output of the da-p1's ac adaptor is 13.5v, although it states 7.2v on the box.

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Offline jk labs

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Re: DAP1 battery question
« Reply #5 on: January 22, 2005, 10:52:49 PM »
I believe it really wants 7.5V, but will operate on 6-8.  Not 12, though.

da-p1 will run safely at 13.5v. i run mine on 12v. even the output of the da-p1's ac adaptor is 13.5v, although it states 7.2v on the box.

marc


?????
I have measured the UNLOADED voltage out from the DA-P1 AC adaptor to be 13.8 Volts DC.  But it drops to a stable & well regulated 7.5 Volts (measured at the DA-P1 input terminal) when delivering the 650 to 800 or so mA the DA-P1 uses.

There are two power supply capacitors within the DA-P1 that see the DC input voltage. They are both rated for 10 Volts operation.

I take your statement above to mean that the DC-DC converter tackles a fully charged lead acid (13.6-14.5 Volts I imagine depending on your charger?).

Heat should not be a problem for the DC-DC converter. But linear regulators develop heat in proportion to the voltage across and heat shortens the expected lifetime of semiconductors. 

I.e., I would not exceed 10 Volts when powering the DA-P1 with an external DC source.   
 
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Offline Tim

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Re: DAP1 battery question
« Reply #6 on: January 23, 2005, 11:34:23 PM »
I believe it really wants 7.5V, but will operate on 6-8. Not 12, though.

the DAP1 will run on a 6v?


that's all that anyone I know has ever used with it...
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Offline leegeddy

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Re: DAP1 battery question
« Reply #7 on: January 23, 2005, 11:42:11 PM »
I believe it really wants 7.5V, but will operate on 6-8.  Not 12, though.

da-p1 will run safely at 13.5v. i run mine on 12v. even the output of the da-p1's ac adaptor is 13.5v, although it states 7.2v on the box.

marc


?????
I have measured the UNLOADED voltage out from the DA-P1 AC adaptor to be 13.8 Volts DC.  But it drops to a stable & well regulated 7.5 Volts (measured at the DA-P1 input terminal) when delivering the 650 to 800 or so mA the DA-P1 uses.

There are two power supply capacitors within the DA-P1 that see the DC input voltage. They are both rated for 10 Volts operation.

I take your statement above to mean that the DC-DC converter tackles a fully charged lead acid (13.6-14.5 Volts I imagine depending on your charger?).

Heat should not be a problem for the DC-DC converter. But linear regulators develop heat in proportion to the voltage across and heat shortens the expected lifetime of semiconductors. 

I.e., I would not exceed 10 Volts when powering the DA-P1 with an external DC source.   
 
Jon

jon, thanks for the detailed specs. i've ran the da-p1 with a 12v sla without any issues, but i will drop the voltage down further.

marc
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Offline nic

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Re: DAP1 battery question
« Reply #8 on: January 24, 2005, 12:06:49 AM »
I believe it really wants 7.5V, but will operate on 6-8. Not 12, though.

the DAP1 will run on a 6v?


that's all that anyone I know has ever used with it...

sweet!
I thought I was going to end up carrying 2 types of lead   :)


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Offline Tim

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Re: DAP1 battery question
« Reply #9 on: January 24, 2005, 12:07:57 AM »
:)
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Offline F.O.Bean

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Re: DAP1 battery question
« Reply #10 on: January 24, 2005, 02:15:33 AM »
6v 7.2amp runs it for AWHILE too, i used to get 10hrs+ from one 6v7.2a
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