If you're installing this device in a permanent location then you're going to need more power then 9V or 4AA batteries. Nothing is going to last more then a few hours/days on a small battery source.
Figure out your draw in W @ 12V, then determine how many 12V7A/5A/9A batteries you'll need to satisfy that load. If your runtime is > then the supply you can provide with the 12V batteries, then add a 12V solar charger. Plan on 4 days in the batteries to allow for bad weather. Either the device above, or http://finch.am/projects/arduinogsm/ should be fairly low draw, they may have 500mA supplies, but shouldn't pull that much power most of the time. The 12V7A batteries are inexpensive and easily obtained and can be easily paralleled to make a long-runtime solution, just not too handy to trek into remote places. On Mon, Nov 26, 2012 at 2:40 PM, Bruce N <[email protected]> wrote: > Thanks Mark. > > This is very close to what I am looking for but it needs, *"**12 volt DC > power supply with a current rating of 500mA". *The best I can give is a 9V > battery, 4 AA batteries, or some lithium ion battery and I want it to last > few weeks if not few months. I wonder if an old Nokia phone can turn a > stepper or servo just like it does to a vibrator? > > -Bruce > > > On Mon, Nov 26, 2012 at 7:06 AM, Mark van Berkel <[email protected]> > wrote: > > > There are devices like this available. > > > > http://www.gsm-auto.com/ > > > > Maybe this would work for you application? > > > > > > Sent from my wireless handheld device. Please excuse my typos... > > > > > > On Nov 25, 2012, at 11:55 PM, Bruce N <[email protected]> wrote: > > > > Hi everyone, > > > > I have been looking into Arduino and similar boards for a project that > > requires a motor to turn ON when a call is received or an SMS is > received. > > That seems to get to no where as power becomes an issue. The unit has to > be > > powered using cell batteries. I am wondering if anyone has hacked > something > > like this before or came across any simple GSM phones that can control a > > motor when a signal is received? > > > > Thanks, > > Bruce > > > > >
