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136  Using Arduino / Project Guidance / Re: problem with seeedstudio gprs shield v2 - how to receive sms? on: July 08, 2014, 06:59:30 am
Search for SIM900. Lots of examples around.
137  Using Arduino / Installation & Troubleshooting / Re: Board not working after one day of use on: July 07, 2014, 01:52:18 pm
Sticky at the top of the forum, loop back test. Try that and let us know the results.
138  Using Arduino / Project Guidance / Re: seeedstudio gprs shield v2 - why litium battery? on: July 06, 2014, 04:24:22 pm
To keep the real time clock running.
139  Using Arduino / Networking, Protocols, and Devices / Re: Sim900 crashing on: July 06, 2014, 03:43:04 pm
I've just had a quick look at the schematics and it looks like you can use software to turn the shield on and off. If this is the case then periodically send an AT to the shield and if it doesn't respond within a certain time turn the shield off and back on again.
140  Community / Bar Sport / Re: Is it just me, or.... on: July 04, 2014, 05:28:06 am
But you can't search for three exclamation marks, it returns no results. And given how often that crops up it would be handy if it did. Or if there was a sticky explaining the problem in the appropriate section?
141  Community / Bar Sport / Re: Is it just me, or.... on: July 03, 2014, 06:03:55 am
My favourite question is "I am designing a traffic light system..." as though it's a project they have set themselves.

It also shows how many people just ask a question without at least trying to use the Search facility.
142  Using Arduino / Project Guidance / Re: Building a tablet pc with arduino on: July 02, 2014, 10:55:48 am
When you say 'EReader', what files are you hoping to be able to read?

If you want a simple touch screen device then you can get such a screen that pairs up with a Mega quite easily.
143  Community / Bar Sport / Re: Students caught out.... on: July 01, 2014, 08:17:36 am
After about 30 minutes of this back and forth, he eventually found some.

Consider yourself lucky - my nearest Maplins doesn't do discrete components. PA systems, fog machines, yes. Resistors in packs, yes. 7805? No way!
144  Using Arduino / Motors, Mechanics, and Power / Re: What will be the total power needed? on: June 27, 2014, 04:18:58 am
The power supply of SIM900 is from single voltage source of VBAT= 3.4V TO 4.5V. In some case, the ripple in a transmitting burst may  cause voltage drops when current consumptions rises to typical peaks of 2A. So the power supply must be able to provide sufficient current up to 2A.

Yes, that is correct. The peaks are of brief duration but unless the supply has sufficient capacity you can have intermittent problems.
145  Community / Bar Sport / Re: Australian ebay seller! on: June 27, 2014, 02:30:23 am
I'm finding that in the UK. They are shipping the stuff in bulk then distributing it from a UK address.
146  Community / Bar Sport / Re: Australian ebay seller! on: June 26, 2014, 05:38:45 pm
Obviously they think you Antipodeans have more money than sense. But I love the way the Australian flag is scattered amongst the illustrations, appealing to your patriotism. Apart from the fact that the advert is typical of the China based operations.
147  Using Arduino / Project Guidance / Re: minimal 24h weather forecaster on: June 26, 2014, 09:35:11 am
Google Zambretti - there's an online weather forecaster that might yield useful information! 
148  Using Arduino / Installation & Troubleshooting / Re: Libraries not being recognized in the code on: June 26, 2014, 08:54:17 am
Please list the exact error(s) you are getting?
149  Using Arduino / Programming Questions / Re: Hello guys I need some helping hand... on: June 26, 2014, 02:20:08 am
The OP has two choices with the AT commands. One is to wait until the modem sends back the OK confirmation, or take the easy way and use delay() which assumes you will get the OK back within that time. The modem won't respond to a second AT command until it has processed the first and returned the OK.

OP, try reducing the delay to 100, and if you have problems increase it by 50 at a time. Or wait until the modem has responded with the OK.
150  Using Arduino / Project Guidance / Re: Cocktail Project on: June 25, 2014, 03:01:01 pm
Do a search - I've seen something like this before. It used a stepper motor to move the glass between the bottles and it was raised to dispense the liquid by an optic.
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