Since this is already titled "offtopic", I'll add that dropping voltage from
7-9V to 3.3V with a regulator is quite inefficient, turning lots of capacity to
heat.
A much better way is using a buck DC-DC converter.
Regards,
Harri
________________________________
From: [email protected]
[mailto:[email protected]] On Behalf Of Jacob Sorber
Sent: Thursday, May 07, 2009 10:05 PM
To: Denis Smorgon
Cc: Rodrigo Roman; [email protected]
Subject: Re: [Tinyos-help] R: (offtopic) D batteries in sensor nodes
You are referring to 6 D cells in series, right? (1.5V * 6 = 9V)
Yes, nominal voltages vary a little with battery chemistry, but the point is
that, if you use 2 AA batteries without any problem, you can change to 2 D
cells without any power supply changes. Just use the same chemistry you were
using before.
Also, in case it helps, wikipedia has a good list of voltages for each battery
size and chemistry.
http://en.wikipedia.org/wiki/List_of_battery_sizes
-Jacob
On Thu, May 7, 2009 at 1:15 PM, Denis Smorgon <[email protected]> wrote:
D battery for alkaline model has 9 V of nominal Voltage and Ni Cd or
NiMh have 8.4 V so you have to pay attention and check if your sensor board
accepts this voltage. On my application I use a Li Ion 7,5 V battery and for
reducing its voltage a voltage regulator is used because MDA320 accepts input
voltage up to 5 V but Xbow recommends 3.3 V.
Denis
________________________________
Da: [email protected]
[mailto:[email protected]] Per conto di Jacob Sorber
Inviato: giovedì 7 maggio 2009 18.38
A: Rodrigo Roman
Cc: [email protected]
Oggetto: Re: [Tinyos-help] (offtopic) D batteries in sensor nodes
The only difference will be lifetime. Typically, standard-sized
batteries all have a nominal voltage of 1.5V (alk) or 1.2V (NiMH) regardless of
size, and can usually be used interchangeably.
Jacob
On Thu, May 7, 2009 at 10:48 AM, Rodrigo Roman <[email protected]> wrote:
(This question may be a bit outside the topic of this mailing
list, but
I think it may be an interesting idea for all mote users here.
Still,
sorry in advance)
Hi all,
We are interested on using D batteries on tinyos-compatible
"low class"
mote (micaz, iris, telosb), instead of AA batteries. Anyone has
experience on using these type of batteries?.
Best,
Rodrigo Roman
http://www.lcc.uma.es/~roman <http://www.lcc.uma.es/%7Eroman>
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