| Arduino Forum ::  Members :: dansku
 Show Posts Pages: 1 ... 3 4 [5]
 61 Forum 2005-2010 (read only) / Frequently-Asked Questions / Please, check if this is right on: August 19, 2008, 10:11:36 pm This is my first project using the atmega programmed using  the arduino, but standalone.I'm not sure if I made all right, so if you could take a look at the circuit at see if there is any problem on it.  here's the link: http://img.photobucket.com/albums/v107/tigerbr/1stproject.pngthanks a bunch  ;D
 62 Forum 2005-2010 (read only) / Frequently-Asked Questions / ATMEGA8-16PU works with arduino on: August 19, 2008, 07:23:43 am ATMEGA8-16PUI don't know about that 16PU, would like to know if it works with arduino.thanks
 63 Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: my first post: arduino, clock, LEDs... on: April 13, 2008, 07:07:22 pm QuoteDaniel,to use a led you must know it's voltage and current.In case of using it with Arduino pins (that works with 5v.), you must calculate the resistor value using the first Ohm Law:R=U/Iwhere U is (5-led's voltage) in Volts, and I is the led's current in Amperes.R value is in Ohm.In your example, R=(5-3)/0,02A=2/0,02=100ohms.I'm sure you can find this in your Electrical Engineering School Books...Yes, thanks! I wans't sure because everywhere I find examples using 220ohm resistor for leds.
 64 Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: my first post: arduino, clock, LEDs... on: April 12, 2008, 11:50:31 pm QuoteQuote- clock in general: how precise is the arduino board? do I need an extra quartz? And how wouldI use it?- how big is the arduino mini? I've read about width and lenght (3x1 cm), but I've seen nothingabout the height of the board...- LEDs: I'll need to order a number of LEDs. What will I have to look at while ordering them?Do they need to be 5V? Or could I also order 3V LEDs? And where can I find information whichLEDs need what kind or resistor?- and finally: do you know of a super easy explanation of shift registers? I've read the tutorialon this page, but I frankly don't quite get it. I'll certainly work it out for myself, but it wouldbe nice if there was an easy explanation of the concept behind it, somewhere...The Dieci has a quartz crystal on it.  It should be accurate within about 5 seconds a day.  That's comparable to a commercial quartz watch.  The mini is in the form factor of a standard dip package.  Including pins it's maybe 7mm thick (that's my estimate).The LED question is a lot more complicated than that because what people don't usually recognize is that they're current devices, not voltage.  Basically though, if you want 20mA, the resistor should be ([supply voltage] - [led voltage]) / 0.02.  Or 50*(supply voltage - led voltage).Supper easy explaination of shift registers would be "serial in, parallel out"  or "parallel in, serial out"  depending on the model.So, if I want to use a bright let that uses 3v/20mA, I should use a 100ohm resistor instead of a 220ohms resistor to have a better light?thanks
 65 Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: LED Driver on: April 12, 2008, 11:41:12 pm How many leds can I use with this circuit from  http://www.arduino.cc/en/Tutorial/ShiftOutin the website, it shows up to two sets, but is there any problem of using more? what about the mA usage, will arduino support all that?
 66 Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Can I use the programmed chip? on: March 12, 2008, 06:48:30 am Thanks, that's what I was looking for!
 67 Forum 2005-2010 (read only) / Frequently-Asked Questions / Can I use the programmed chip? on: March 11, 2008, 08:45:50 pm After I've done all the programming and testing with arduino board. What should I do to take off the microchip and use it in my project, on my board? Should I just follow the data sheet  then? :-?
 68 Forum 2005-2010 (read only) / Bar Sport / Re: Arduino T-Shirts for Fans on: February 22, 2009, 02:41:53 pm @n00b, just on yours
 69 Forum 2005-2010 (read only) / Bar Sport / Re: Arduino T-Shirts for Fans on: February 21, 2009, 07:11:42 pm ok ok, just some ideas
 70 Forum 2005-2010 (read only) / Bar Sport / Arduino T-Shirts for Fans on: February 21, 2009, 12:09:02 am Hey ppl, what would you think of a shirt like this?i could make them and ship from brazil, all for a good price. anoter way to spread the arduino way
 71 Forum 2005-2010 (read only) / Bar Sport / Re: freeduino.org not updating? on: March 08, 2010, 07:59:19 am maybe im a bit dumb, but cant find a place to send links
 72 Forum 2005-2010 (read only) / Bar Sport / Re: freeduino.org not updating? on: March 08, 2010, 04:57:09 am I mean, they are not adding new links
 73 Forum 2005-2010 (read only) / Bar Sport / freeduino.org not updating? on: March 07, 2010, 12:38:39 pm the website freeduino.org is not updating new arduino pages??
 74 Forum 2005-2010 (read only) / Bar Sport / Kevin Mitnick - Art of deception Presentation on: January 27, 2010, 04:06:16 pm People, here is the presentation of Kevin Mitnick, ex-hackerI have uploaded his presentation, very good!you can check it here:http://www.danielandrade.net/2010/01/27/campus-party-brazil/
 75 Forum 2005-2010 (read only) / Bar Sport / Arduino Wallpaper on: February 18, 2009, 08:25:16 pm Just for fun:http://www.danielandrade.net/2009/02/18/arduino-wallpapers/exemple:does any one wants in diff color? greetings
 Pages: 1 ... 3 4 [5]