On Fri, 25 Sep 2009, Jim Jackson wrote:
> On Sat, 26 Sep 2009, Peter Harrison wrote:
>
>> On Sat, Sep 26, 2009 at 8:29 AM, Matthew Minuti <>
>> wrote:
>>>
>>>
>>>> The DC power supply is vital, as I'm running off 12v, and part of the
>>>> attraction
>>>> of the 7260 is the acceptable voltage range and low power.
>>>>
>>> Maybe a simple voltage conversion circuit can help? The LM7805 is a
>>> handy little device, even if it's not the most efficient possible
>>> solution, it's easy enough to use.
>>
>> Inefficient alright - from 12v to 5v it would waste over 50% power, not to
>> mention heating the regulator. My project is a small solar powered boat
>> which will need to operate 24 hours a day. Low power consumption was
>> the primary reason I got this particular board.
>
> For powering my TS7200 from a "12V" Lead Acid battery, I purchased a little
> switchmode PSU module that substitutes for a 7805, and has a wide input
> voltage range. The part is PT5101 from Powertrends. I bought mine from
> Farnell here in the UK. It will supply upto 1 amp and they claim efficiency
> of over 90% at an input voltage of 16v
Ooops, was reading data for 12v version; claimed efficiency is better than
85% for 0.3A load or more, at 0.2A load eff is 80%.
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