Show Posts
Pages: 1 ... 3 4 [5] 6 7 ... 18
61  Using Arduino / Networking, Protocols, and Devices / Re: controlling arduino by ios device wirelessly on: July 17, 2013, 05:41:31 am
You don't need a WiFi shield to do WiFi with an Arduino.
A working set-up is for example an Ardino UNO equipped with an official Ethernet shield ( more specifically with a W5100 Ethernet chip) and a little pocket route connected to the Ethenrnet shield.

I've used this and similar set-ups in several projects. The above is the standard that works to of the box with Aruino.

I am using a Teensy++2 with a WIZ812MJ in one project and recently designed what I jokingly call a Frankenduino that combines a Teensy3 with a WIZ820io ( with a W5200).

Not only is this less expensive overall compared to the original Arduino WiFi shield but also much faster to get to work. A commercial pocket router like the TP-Link TL WR702n router comes with a self explanatory web interface that allows you to configure the router quickly either as an AP or in client mode and you can do that from your iPhone without having to open and program Arduino code.
AFAIK No WiFi shield offers that!
62  Development / Other Software Development / Arduino Eclipse plugin - New Version on: July 13, 2013, 04:16:29 pm
Jantje has released a new version of the Arduino Eclipse Plugin that works with the Arduino 1.5.2 beta IDE and supports the Arduino Due, as well as the Teensy, Teensy++ and Arm Cortex M4 32bit based Teensy3 microcontroller boards.

I have written some Installation instructions for Mac OSX, but other than file/folder locations and perhaps OS specific differences in the Eclipse UI there are no Mac specific things in these instructions so they should work for Linux and Windows users as well. Look here in the "Teensy, Arduino etc." section :
63  Using Arduino / Interfacing w/ Software on the Computer / Re: Importing Arduino sketches to Eclipse (C/C++) on: July 13, 2013, 04:05:43 pm
Or in fact much better yet, use the Arduino Eclipse plugin. Newest version is
Installation instructions are here under "Teensy, Arduino, Etc." :
64  Using Arduino / LEDs and Multiplexing / Re: How to drive high power LEDs on: July 13, 2013, 03:49:36 pm
What exactly would be wrong with the external MOSFETs ?

I mean aside from the fact that I believe designing a proper board seems may be a skill the OP yet has to acquire. OTOH that is not soooo difficult. Many of the spec sheets for LED driver chips provide very good application examples and sometimes there are additional App notes with designs for demo boards.
65  Using Arduino / LEDs and Multiplexing / Re: How to drive high power LEDs on: July 10, 2013, 09:50:43 pm
You need to control these with a switched constant current power supply.
The very low resistor value you calculated is based on a fixed forward voltage. As the LED heats up that forward voltage is going to change and you would need quite a different resistor. Other wise due to the changed forward voltage a higher forward current would flow.
As you can see in the spec sheet at higher forward currents, higher forward voltages result. And so on....

As fungus has already indicated, you will need a very substantial heat sink. There are online calculators that will help you with calculations and define what heatsink will be required.

Perhaps provide more details as to what you are trying to achieve. These LEDs you linked to are monsters and I am wondering if that lumen output is really needed.
66  Using Arduino / Microcontrollers / Re: Arduino Due - issue on: July 07, 2013, 09:21:13 pm
You may want to update to the latest ( V2.1.0.4 released last week) version of the Arduino Eclipse plugin. That may remedy some problems.
67  Using Arduino / Interfacing w/ Software on the Computer / Re: arduino Eclipse MAC and Windows on: July 07, 2013, 09:17:33 pm
I am not exactly sure what you are trying to do but...

If you want to run Eclipse to compile Arduino code then there is no better way of doing that than the newest V2.1.0.4 version of the Arduino Eclipse plugin:

I've written some installation instructions:
68  Using Arduino / Networking, Protocols, and Devices / Re: Wire.h error working with Eclipse on: June 28, 2013, 05:43:37 am
If you are using the Arduino Eclipse Plugin there are provisions made to import a complete library not just a particular file out of the library.
Highlight your project and select "import". That will present you with a selfexplanatory selection to either " import a folder containing source code ...." Or "import Arduino libraries...".
When selecting the latter it will present a list of all the libraries that come with the Arduino IDE and all the libraries in your personal libraries folder.
69  Using Arduino / LEDs and Multiplexing / Re: How to vary brightness of high-powered LED with arduino on: June 16, 2013, 04:42:32 pm
No! What you're paying for is a fully developed integrated system that is aimed at a very specific low-volume market. It likely comes well packaged with documentation, and is probably backed by a support and business infrastructure. THAT is what you are paying for! Reducing this to pure hardware cost only is a bit naive.

@OP LedEngin makes some High Power specialty LEDs two versions of UV LEDs are amongst them. Then you need a power supply and a constant current LED driver.
This one for example should work and plugs right on top of an Arduino.
70  Using Arduino / LEDs and Multiplexing / Re: Connecting RGB LED Anode on: June 12, 2013, 07:41:47 pm
71  Using Arduino / Networking, Protocols, and Devices / Re: Wifi Dongle on: May 30, 2013, 07:13:56 pm
He's going to plug that into a USB power supply. Yes, you should be able to connect that to an Ethernet shield. You should be able to connect most WiFi routers to the Ethernet Card. A TP-Link TL WR 703n works fine here for example.
72  General Category / General Discussion / Re: The arduino Yun; cool, but what are some examples of how to leverage it? on: May 22, 2013, 05:48:26 pm
I think the ability to wirelessly program an Arduino board could be a killer feature. The Yún uses the same WiFi chipset as a TP-Link TL WN703n
Something somewhat hacked but working has been done before Would be interesting to see what interface is used on the Yún to communicate with the Atheros.
73  Using Arduino / LEDs and Multiplexing / Re: PWM dithering explanation on: May 20, 2013, 08:30:07 pm
Very interesting. Never thought of that.

Little correction on the article. The flicker frequency " for lack of better words" of 30 is too low. For a TV that's ok as usually pixels are not turned from full on to full off etc.
However PWM dimming does just that so the min frequency that will not be noticed by most people is 100Hz.
74  Using Arduino / LEDs and Multiplexing / Re: Controlling 8 stepper motors from one Arduino 328 on: May 14, 2013, 05:25:49 am
I am sure you could write some software and build some electronics to accomplish the task, however, here is a solution that will allow you to use servos without a headache. It has 16 servo channels and a small well written library.
75  Using Arduino / LEDs and Multiplexing / Re: blink-without-delay slowing things by factor 10 ? on: May 08, 2013, 05:22:37 pm

Thanks! You are absolutely correct and your bullet points explained it very clearly. It pains me that the value of 256 ms really stared me in the face and I still did not get it. I got the same explanation on the Teensy forum using a lot less words :-)
Pages: 1 ... 3 4 [5] 6 7 ... 18