[Tinyos-help] Regarding battery Life

[Xavier Orduña]

Hi Steve,

I've already seen this pdf with this power consumption graphic.

Nice to know how to do it, but for the moment, with my equipment I will 
try to use voltage readings as a first reference.

Anyway I will try to search this equipment to best know the power 
consumption of my software.

Thanks

Xavi
> Hi Xavier,
>
> On Tuesday 19 June 2007 04:49:51 Xavier Orduña wrote:
>   
>> Regarding to this topic, I'm working in reducing some power consumption,
>> Is there any way to know the actual consumption in mA of the tmote sky?
>> the idea is to check if implemented improvements really save energy.
>>     
>
> AFAIK, the only way to measure actual power consumption is with an external 
> measurement device.  Here's what we do to look at power use on our mote 
> designs.
>
> We put together a simple but high bandwidth regulated power supply that is 
> used in place of the mote's battery.  It's output is regulated *after* a 
> precision series resistor that can be used to measure current draw.  By 
> reading the voltage drop with a high-speed DAC connected to a PC running a 
> LabView program we wrote, we can log power consumption over both 'short' 
> and 'long' periods of time, measuring min, max, avg power consumption as well 
> as showing the actual current response to various events (like when the radio 
> goes on and off).
>
> There's a good example of using this kind of measurement tool in the AntiTheft 
> sample app of tinyos-2.x.  It includes a pdf presentation showing the impact 
> of various resource management mechanisms on the power consumption of their 
> mote.  Very useful info, IMO.
>
> All the best,
> Steve
>
>   

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.millennium.berkeley.edu/pipermail/tinyos-help/attachments/20070619/d54a8cdf/attachment.htm