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46  Development / Other Hardware Development / Re: Where to get 4-digit 7-segment LED with decimal points and colon 0.56" digits? on: April 06, 2012, 08:50:52 pm

Can select common cathode or anode too when purchase. But only red.
47  Using Arduino / Networking, Protocols, and Devices / Re: SMS length issues with the SM5100B from sparkfun? on: March 06, 2012, 10:22:45 am
I think this has to do with PDU & Text Mode SMS.
I haven't personally try the PDU mode, but I think, only in that mode, 160 characters can be sent.
48  Community / Bar Sport / Re: Pooling resources to buy components from China. Any interest? on: February 29, 2012, 12:12:14 pm
I didn't really need 1000 but the price was pretty cheap so I said what the heck.

If you are using 600, 1000 is the quantity you should go for. Those looks like from 4UCON. I got those (straight instead) somewhere else cheaper than 4UCON. I think for parts like connectors & passive components, you have to bite the bullet and pay upfront. Like for example, I have about 15K of connectors just for the osPID project I'm working on. That's a lot of connectors I guess for a small shop like me.
And some advise for buying from China, get your samples in first before bigger purchases.

On the pool purchase, there might be more than 1 guy going for the reel!  smiley-grin
49  Using Arduino / Programming Questions / Re: Mega2560 low power state / watchdog on: February 16, 2012, 08:25:50 pm
In power down mode, IO clock to peripherals is being stopped. When awake, it takes few cycle to stabilize like what Nick said.
50  Using Arduino / Programming Questions / Re: Sleep and wake intervals on: January 04, 2012, 12:17:24 am
There's only 1 part might worth checking. Rearrange the Timer 2 configuration steps as in the datasheet page 156.
They advise disabling the timer interrupt > set ASR mode > write new values to the prescaler > enable the interrupt.
Worth a try as they said the configuration might get corrupted if that sequence is not followed. smiley
51  Using Arduino / Networking, Protocols, and Devices / Re: Xbee transform 0x00 in 0x80 on: December 13, 2011, 09:19:07 pm
It might be the XBee module baud rate itself. Also check the baud rate in the X-CTU is the one matches the module baud rate.
52  Community / Bar Sport / Re: Need help From UK folks finding UK-only parts on: December 06, 2011, 07:44:58 pm
Is this the one:

If you are desperate to have them in small quantities, just order the samples. Probably maximum 10 pieces. Just don't abuse the sample service, they'll get pissed soon after that.  smiley-grin

And another same alternative:
53  Using Arduino / Networking, Protocols, and Devices / Re: Resetting SIM900 modules on: December 05, 2011, 10:01:03 pm

I could not get my shield working with the Arduino UNO. Are you able to provide any sample code as I keep getting "no response" and "SMS ERROR" when trying to send an SMS or do practically anything with it.

It powers on, I hold the PWR button so then the STATUS LED displays. NET flashes every now and then but like I said I just keep getting "no response" every single time. I'm running serial and gsm at 9600 baud rate if that helps.

I'm not sure whether this is relevant to your problem. But, you might want to look at this thread:

I know you are using the IteadStudio version, but I think they are pretty similar and had that silly power switch thing (at least the 1st version of Seeedstudio's).
54  Using Arduino / Programming Questions / Re: Problem with reading string from GSM on: December 05, 2011, 04:15:57 am
See that "delay (1000);" in your code?
That's your mistake.
You'll get tonnes of bytes within 1000 ms!
55  Using Arduino / Programming Questions / Re: Problem with reading string from GSM on: December 04, 2011, 07:41:41 pm
9600 bps is pretty slow compared to what the Arduino is running at. Receiving a byte should take about 1ms at 9600 bps which a lot slower than your loop is running.
56  Using Arduino / Networking, Protocols, and Devices / Re: Resetting SIM900 modules on: November 29, 2011, 06:01:56 am
The logic level is 2.8V on the SIM900. Don't simply connect without checking the SIM900 datasheet.
57  Using Arduino / Networking, Protocols, and Devices / Re: GSM shield stops working after a week on: November 26, 2011, 09:44:31 am
Which GSM shield you are referring to?
58  Using Arduino / Networking, Protocols, and Devices / Re: Gsm Shield doesn't response on: November 24, 2011, 12:04:41 am
The LED seems to be a purely power indicator LED. I don't think it's connected to any of the SIM900 pin.
59  Using Arduino / Programming Questions / Re: ATMega328P sleep mode on: November 10, 2011, 12:27:09 pm
The brownout detect consumes about 20uA++. The default bootloader enables them.
You can either choose to hardware disable them or do it on the fly using software.

But, somewhere else is sucking that extra 70uA++.
60  Using Arduino / Networking, Protocols, and Devices / Re: GPRS sheild not working with NewSoftSerial on: November 03, 2011, 06:48:16 am
Those two sketches do completely different things. They are not interchangeable.
I think at their wiki site, the 1st sketch is to test the AT command from the PC site by using the Arduino as a bridge in between.
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