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5836  Using Arduino / General Electronics / Re: RTC 1307 Problem on: May 23, 2011, 10:50:06 am
Upload a picture of how you were touching the crystal on the cap or across the leads?
5837  Topics / Education and Teaching / Re: Arduino workshop featured at American Association of Physics Teachers conference on: May 23, 2011, 10:30:16 am
It's gonna be a long day if the organizer(s) don't know what they're talking about (8am-5pm) and I'll be sure to bring my prize-wining apparatus with me. Forgot to post it on the exhibition but will do once I have time.
5838  Using Arduino / Project Guidance / Re: How Hard Is A Button Pushed? on: May 23, 2011, 09:41:35 am

Are you sure those are sensitive to force or just to touch/no touch?
5839  Using Arduino / Project Guidance / Re: atmega238 + breadboard on: May 23, 2011, 01:34:52 am
http://www.sparkfun.com/products/8571

or

http://dipmicro.com/store/C1K22-50

A bit expensive to just buy two of them but if you need other stuff, buy a dozen of them with other stuff to justify shipping.

dipmicro is running a free/reduced shipping coupon SPRING10 for $10 or more.

Don't buy too many like what I did. I bought 1,000 of them. They were so cheap by the super dozen  smiley-money  smiley-cry
5840  Using Arduino / Project Guidance / Re: How Hard Is A Button Pushed? on: May 23, 2011, 01:22:46 am
This will do:

http://www.sparkfun.com/products/9375
5841  Topics / Education and Teaching / Re: Arduino workshop featured at American Association of Physics Teachers conference on: May 23, 2011, 12:09:25 am
The workshop is a bit expensive even for AAPT members, $125 + one day of meeting registration ($120ish). I've signed up. Hopefully will bring good news.
5842  Using Arduino / Displays / Re: LMC-SS2A20 2x20 display on: May 22, 2011, 07:43:26 pm
That's awesome. Be sure to post some progress on the exhibition forum!
5843  Using Arduino / Displays / Re: LMC-SS2A20 2x20 display on: May 22, 2011, 03:37:12 pm
That is an awesome display with buttons! I'm glad you got it working. Any chance that you can sense those buttons? How many are there? This may be a nice thing to mount on your wall to control stuff like lighting, temperature or garage door.
5844  Community / Bar Sport / dipmicro.com is carrying Arduino-compatible boards now! on: May 22, 2011, 02:07:29 pm
Just FYI, dipmicro.com has recently started carrying Arduino-compatible boards made by Seeedstudio. It has quite a selection of boards but it's trying to test the water with small stocks. So if you're buying some arduino boards, give them a consideration. Their parts prices are among the lowest I've shopped since 2009. If we give them the right signal that arduino is popular, they may decide to stock more boards and who knows maybe even sensors.

Here is a coupon:

SPRING10

Trust me, it works. All orders above $10 get some shipping discount.

Disclaimer: I'm not related to dipmicro.com except that it carries a couple of my arduino shield designs, so do some other online stores. They're small business compared with sparkfun.com but quality of parts makes no difference as far as I could tell. If you like them, spread the word. They could use some word-of-mouth ads. during this bad economic situation.
5845  Community / Bar Sport / Re: Your latest purchase on: May 22, 2011, 01:02:34 pm
Thanks for renewing my memory. I've seen this store in the past, price is pretty much bottom. It's in Asia though. For faster shipping, I normally go to dipmicro.com. I'm in the US and they're in Canada and ship to US customers FROM US.

My leds are high brightness ones I used for this project:



Just FYI, Canadian dollars are bit more than US$:

Order Inventory:
Product: Temic TSSP4400 Infrared Emitting Diode
Quantity: 20
Product Code: TSSP4400
Price: C$2.85

Product: Straight RJ45 8p8c PCB Mount Jack Receptable
Quantity: 10
Product Code: TYCO-5555164-1
Price: C$8.03

Product: Blue ø 5mm Clear LED Extra Bright 8000mcd
Quantity: 50
Product Code: LED5B
Price: C$2.74

Product: Green ø 5mm Clear LED Extra Bright 15000mcd
Quantity: 50
Product Code: LED5G
Price: C$4.06

Product: Red ø 5mm Clear LED Extra Bright 15,000mcd
Quantity: 50
Product Code: LED5R
Price: C$2.79

Product: White ø 5mm Clear LED Extra Bright 20,000mcd
Quantity: 50
Product Code: LED5W
Price: C$2.72

Product: Yellow ø 5mm Clear LED Extra Bright 7,000mcd
Quantity: 50
Product Code: LED5Y
Price: C$2.84

Product: Lithium Battery CR2025 Ф20mm 150mAh 3V
Quantity: 27
Product Code: BAT-CR2025
Price: C$8.64

Product: DS1307 Dallas Maxim 64 x 8 Serial Real-Time Clock
Quantity: 10
Product Code: DS1307N
Price: C$6.83

Product: Coin Battery Holder ø 20mm (CR2025, CR2032)
Quantity: 20
Product Code: BH2025
Price: C$4.37

Product: 74HC595 8-bit Serial-In Parallel Out Shift Register
Quantity: 12
Product Code: 74HC595
Price: C$2.55

5846  Using Arduino / Programming Questions / Re: How safe this programming practice is? on: May 22, 2011, 12:14:31 pm
Awesome! My original intent was conversion! I have 4 bytes and I use it for a variable step (increment or decrement on input when you press up/down button). Then in other cases like displaying a list inc/dec better be 1 or you only get to pick a portion of the list so this variable can be use to store other info like where to display a fancy DOS-style scroll bar. So I needed to address or refer to these 4 bytes as 4 short int. smiley
5847  Community / Bar Sport / Re: Your latest purchase on: May 22, 2011, 12:10:08 pm
doublet,

Where is that store you shopped from? Pretty good price!
5848  Community / Bar Sport / Re: RadioShack is listening so shout out arduino if you want! on: May 21, 2011, 10:41:24 pm
Just being clear, I don't like RadioShack at all. There are apparently many reasons they're not liked by many. I am just thinking that if we shout arduino enough and they might listen. They have many stores over the globe so if they carry arduino then it's going to be a good thing for arduino to see the mass public.
5849  Using Arduino / Programming Questions / Re: How safe this programming practice is? on: May 21, 2011, 04:32:04 pm
Rob,

That'll take me a while to understand what that def means. I'm slow.
5850  Using Arduino / Programming Questions / Re: How safe this programming practice is? on: May 21, 2011, 04:24:48 pm
I didn't know I could add an array to a union before. My test reveals the addresses are the same with all members of the union, so using &c+1 you can get to the next byte but the array is most elegant and shouldn't cause the concern westfw has. I'll do it this way. Thanks again everyone!
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