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5566  Using Arduino / Programming Questions / Re: Temperature readings on: June 20, 2011, 08:45:22 am
Since you are new, you need to provide your code and picture of your connections. That's typically needed for an answer. We don't have crystal balls.
5567  Development / Other Software Development / Re: Web based ASCII editor for quick drawing www.asciiflow.com on: June 19, 2011, 11:44:03 pm
I don't get it. Totally useless to me. smiley-roll
5568  Community / Bar Sport / Re: A junkbox for electronics hobbyists! on: June 19, 2011, 09:44:24 pm
Just so you know, there is a market for anything. I've even sold broken ATX psus in the past.

One (wo)man's trash is another (wo)man's treasure.

I'm a collector and I collect old electronics, computer processors, old software/games and literature. I also trade my shields to get items into my collection.
5569  Using Arduino / Programming Questions / Re: Cutdown Timer? on: June 19, 2011, 08:27:49 pm
Code:
Char buffer[17];
Sprintf(buffer,"%03d:%02d",minutes,seconds);
LCD.srtcursor(0,0);
LCD.print(buffer);

You will have to correct my caps since iPad is crazy and forces changes on my typing.
5570  Using Arduino / Displays / Re: Help 16x1 HD44780 Cant Geit it to work on: June 19, 2011, 07:53:01 pm
 smiley-mr-green smiley-mr-green smiley-mr-green Zombie display. Don't forget to sniff and touch when connecting electronics and always power down ever for a very simple connection. You never know if you slip your fingers and touch 5V with GND just for a moment it could be very painful on your wallet.

alexus, do you mean you want a count down instead of cutdown display?

Quote
yey frid LCD came back to life smiley I didnt work few min ago but now it works same setup smiley
So i guess I all set
Use the previously fried one for your experimenting, although it is alive it may not be healthy.

Don


5571  Using Arduino / Displays / Re: Help 16x1 HD44780 Cant Geit it to work on: June 19, 2011, 07:42:02 pm
When I try to connect something for the first time, I stick my nose very close to the components to sniff around for a while to make sure no magic smoke is coming off the component. Unless it breaks in an instance, like an IR receiver I fried (I could feel the bang on my finger while inserting it into the board, and heard bang), you can save it by sniffing and touching it to see if it's happy there.

(I was too slow in reply)
As pointed out by floresta, the suggested pot value is 10 to 20Kohm TOTAL, not what you tried. If you can get the black boxes by removing the 10Kohm resistor and turning the potentiometer, you can proceed to the next step on the adafruit tutorial.

5572  Community / Bar Sport / Re: A junkbox for electronics hobbyists! on: June 19, 2011, 06:26:31 pm
Great! I think we can do some groupon like stuff, (if I understand this correctly) someone buys a big lot of something and distributes to everyone interested for less cost than individual purchases.

How do you sort by location then?
5573  Community / Bar Sport / Re: Visiting Boston on: June 19, 2011, 06:21:59 pm
Thanks focalist, we're just trying to relax and brush up on some American history. We'll definitely go to some beaches and restaurants.
5574  Using Arduino / Displays / Re: Help 16x1 HD44780 Cant Geit it to work on: June 19, 2011, 06:16:32 pm
Quote

i hate build in LED its not bright enough


You could get some higher powered LEDs and use proper ways to power/control them:


5575  Using Arduino / Displays / Re: Help 16x1 HD44780 Cant Geit it to work on: June 19, 2011, 05:56:01 pm
Your potentiometer seems to have 4 pins, does it? Strange. Plus, you don't need that resistor in series with the potentiometer. Do you have a multimeter to confirm the thing is a pot instead of something else? What is the value of the resistance?
5576  Using Arduino / Displays / Re: Help 16x1 HD44780 Cant Geit it to work on: June 19, 2011, 05:52:37 pm
Why did you connect an external LED to pin 13 anyway, there's already one on the board (with the appropriate resistor)?

Don

Someone some time ago posted such a tutorial on arduino website that tells everyone to stick an LED like that. (I tried to find it:() and it has not been removed since.
5577  Using Arduino / Displays / Re: Help 16x1 HD44780 Cant Geit it to work on: June 19, 2011, 04:30:45 pm
You should have instead bought this for just $1 more:

http://cgi.ebay.com/HD44780-16x2-LCD-module-Green-backlight-Free-pin-header-/320537704484?pt=LH_DefaultDomain_0&hash=item4aa1893824

Twice the characters.

You need to post some pics of your connections and code you used. Just saying "I did everything the tutorial said" is not the right answer.
5578  Using Arduino / Programming Questions / Re: taking bits from bytes. need help on: June 19, 2011, 02:43:33 pm
Not the best explanation I've seen so far.

In short, the 0 bits in the constant operand (say B11110000) in the AND operation will erase the content of the other operand, while the 1 bits preserve the content of the other operand.

So if you do (00000001 AND temp) then the result is 7 zeros and the last digit is the same as the last digit of the temp. This erases the high 7 bits of temp and only preserves the last bit in the result.

If you do (10000001 AND temp) then the result is 6 zeros and the first and last digits are the same as the first and last digits of the temp. This erases the middle 6 bits of temp and only preserves the first and last bits in the result.

Just imagine the 1's are punched holes and 0's are no holes on a sheet and you have 8 answers on a  bubble sheet exam in temp. You line the two sheets up and only the answers behind a hole is seen (whatever bit value 0 or 1), the rest is not seen (0's).
5579  Using Arduino / Programming Questions / Re: taking bits from bytes. need help on: June 19, 2011, 01:42:20 pm
byte temp3=(temp1&B11110000)¦(temp2&B00001111);
5580  Using Arduino / Programming Questions / Re: .cpp tabs can't find include files on: June 18, 2011, 10:45:49 pm
Are those two libraries EEPROM.h and Bounce.h coming with Arduino IDE or with your 10-tabbed program. If it's the latter, use "EEPROM.h" instead of <EEPROM.h>
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