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1  General Category / General Discussion / Re: Thoughts on the Yun on: October 24, 2013, 10:48:08 am
If you look above, I did mention there are definitely scenarios where your solution might make sense. 

Obviously, the difference in functionality is that an additional gateway is required.  Good luck with your product.
2  Community / Gigs and Collaborations / Re: join our geek community ! on: October 24, 2013, 10:26:42 am
Why would you sign up?
Do you know who they are? Where they are? Who is the group of "professionals" who will evaluate whether they actually allow you to join them? What are their professions? What will they do with your email address?  Etc., etc.

Pete

Pete, in the original post - he stated they are 'mind hackers'.  That leads me to believe they are probably a team of brain surgeons, but I will grant you it is possible they are psychologists.  That's why I wanted to clarify before I sign up.  Surely we should be able to trust a doctor with our email, wouldn't you think?
3  General Category / General Discussion / Re: Thoughts on the Yun on: October 24, 2013, 10:19:18 am
The discussion is about WiFi.  I can definitely envision scenarios where your solution may be ideal, like home automation.   If I were going to market that, it would be as part of home automation components.  Just doesn't look feasible to sell to the hobby market.  Just my opinion though.
4  General Category / General Discussion / Re: Thoughts on the Yun on: October 24, 2013, 09:54:28 am
The Yun is very cool and too expensive, I agree.  Why does adding WiFi to the Arduino have to cost so much? 
5  Community / Gigs and Collaborations / Re: join our geek community ! on: October 24, 2013, 09:47:05 am
I'm just about to sign up, but I'm still trying to figure out what it is this group does.  What is a mind hacker?
6  Community / Bar Sport / Re: What is your experience with Arduino from China? on: October 24, 2013, 04:34:16 am
The Chinese stuff I have bought on eBay has all been fine.  Works just like Arduino, only cheaper.  I don't buy anything that says it's Arduino if it's not - that's just rude.
7  Using Arduino / Displays / Question about the Nokia 5110 84X48 display on: May 21, 2013, 11:49:28 am
I have a few questions for those of you familiar with the Nokia 5110 84X48 display.

I've used it in conjunction with the Adafruit libraries -
https://github.com/adafruit/Adafruit-PCD8544-Nokia-5110-LCD-library
https://github.com/adafruit/Adafruit-GFX-Library

I know when you use one of the graphics primitive from the GFX library,for instance:
display.drawPixel(10, 10, BLACK);

the pixel is written to the buffer only, until you use a command like this:
display.display();

at which point the pixel is written to the screen.

I also understand that since this is a SPI device, the library must set the CS pin of the SPI screen being communicated with to LOW to enable transmission. (or it might be high or some other state.  not really sure)

Anyway, I have a couple of questions.

1. Where is the screen buffer?  Is it located on the Nokia 5110 board somewhere, or is it stored on the Arduino?
2. Does the Adafruit library enable and disable the CS pin for the display each time a command is issued, or does the pin stay enabled once the init command is issued?  I'm curious because I would like to drive multiple LCD's from one Arduino. 

For instance, I define two screens, leftScreen and right Screen, and set all pins the same in the setup, except for the CS pin

In the body of the code would I be able to do something like this:

leftScreen.drawStuff(x,y,z);
rightScreen.drawStuff(i,j,k);
leftScreen.display();
rightScreen.display();

I hope my questions make sense.  I'm going to give this a shot later tonight, but if any of you have some input now it could probably save me a little time and frustration.  smiley

Thanks!
SPInoob
8  Topics / Device Hacking / Re: Making a USB charger of a Racing Pack on: February 27, 2013, 06:49:17 pm
I've been reading the datasheet for the LM7805 -

http://www.fairchildsemi.com/ds/LM/LM7805.pdf

Looks to me like a problem would be the dropout voltage of 2V.  I read this to mean the 7805 will stop outputting when the input voltage dips below 7 volts.  That discharging RC battery wouldn't last long like that, would it?

Would 7.2V really be a heat issue at that low of a power draw?
9  Products / The Arduino Starter Kit / Re: Arduino Starter Kit Section Guidelines on: October 25, 2012, 12:47:56 am
Is the project book copyrighted?  Is there a pdf available to download?
10  Community / Products and Services / Re: Highly Anticipated 32-bit "Due" due When? on: October 23, 2012, 04:49:56 pm
Quote
It may not be wrong.  Mouser often has cheaper prices than anywhere else for Arduinos.  Arduino Mega2560 for ~39.00 USD: http://www.mouser.com/ProductDetail/Arduino/A000067/?qs=sGAEpiMZZMt0re6d%252b2Rx9v%252bc%252bQEIaOW9

Well, for 39.99 I couldn't resist.  Just put one on order - site is showing them on backorder.  Hopefully it won't be too long.  Thanks for the info guys.
11  Community / Products and Services / Re: Highly Anticipated 32-bit "Due" due When? on: October 23, 2012, 05:15:45 am
Quote
Arduino Due now available for order at Mouser (A000062)!  Small quantity on the way with a large order coming in November.

-Tim

Just went to your link - I'm assuming the 36.99 price I saw was wrong.
12  Topics / Robotics / Re: Help me name this bot on: October 10, 2012, 08:18:40 am
Thanks for the suggestions.  I have decided to name this bot Box-E

Too many sensors?  Didn't know that was possible!  $3 on ebay, so why not?  Even with 4 ultrasonics, I'm still at less than half the cost of one PING sensor.

The top box is a Stellaris Launchpad box, the bottom box is an MSP430 Launchpad box.  The shame is that there isn't a single TI part in the robot, at least as of now.  The microcontroller is ATMEL and the motor driver is Toshiba.  Sorry TI 

The box is not a great look, but I find it to be a great platform while I figure out what I want to do.  Kinda like breadboarding the chassis.  It's my second bot, so I'm still learning what design consideration to keep in mind.
13  Topics / Robotics / Help me name this bot on: October 09, 2012, 06:12:00 am
What should I call this robot?  Right now it is running a Nano, but it may end up with a Mega, or possibly a Nano and an MSP430 - so the name needs to be microcontroller and brand agnostic. 

14  Topics / Robotics / Re: Lego Ultrasound Sensor - please help on: October 08, 2012, 10:51:11 am
Have you considered buying an HC-SR04 ultrasonic sensor on eBay?  They are about $3.
15  Community / Bar Sport / Re: Your latest sample on: September 18, 2012, 08:05:14 am
I've found Texas Instruments to be very generous and fast with their samples.  I don't try and order once a week or anything though.

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