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1  Using Arduino / General Electronics / Re: ICSP / SPI single slave SS pin Arduino UNO OVERLOAD! on: February 08, 2013, 04:35:48 pm
Thanks for the reply John!
Any insight into if it will work with the arduino wifi shield?
2  Using Arduino / General Electronics / ICSP / SPI single slave SS pin Arduino UNO OVERLOAD! on: February 08, 2013, 02:39:56 pm
I'm trying to connect a few different devices to a arduino uno and I'm running out of pins.  I only have one device using the ICSP bus.  Because I only have one slave device can I have the SS pin for it just go direct to ground instead of taking up another one of my precision i/o pins?  Since it's the only device is it ok to have it listening for data all the time or will it get confused some how?
3  Using Arduino / General Electronics / Re: real music (not tones) on: April 27, 2012, 02:44:41 pm
Thank you very much for the reply guys!  Not really interest in midi more into voice stuff then notes.  How is it done in cheap toys that can say a few words or make an explosion sound?  Like the GI Joes with a button on them that makes it say one of three phrases?

4  Using Arduino / General Electronics / real music (not tones) on: April 26, 2012, 09:13:26 pm
I'm hoping someone can point me in the right direction.  I want to learn how speakers work and how I can control a speaker with an arduino to make sounds.  But not the basic tone stuff, actual music and/or playing back a person talking etc.  I see a lot of tutorials for making tones but that's not what I'm interest in.  I also see a number of shields that just do the whole thing for you but I'd like to understand what is happening and how to do it onboard the arduino.  Any help would be greatly appreciated. 
5  Using Arduino / Programming Questions / Re: Triggering a solenoid EVERY FEW DAYS? on: November 04, 2011, 11:51:53 pm
Thank you very much!
6  Using Arduino / Programming Questions / Triggering a solenoid EVERY FEW DAYS? on: November 04, 2011, 11:17:01 pm
I need to write a little arduino program that is going to trigger a solenoid every few days.  I’m a newbie programmer.  I’m told that millis() will overflow and reset after awhile.  If I just do a super long delay is that ok?  Will a long delay somehow be affected by millis() resetting?  Or be affected by some other clock thing resetting after awhile?

void setup() {     
  pinMode(3, OUTPUT);

int count = 96;

void loop() {
  if(count < 96){
  else if(count == 96){
    count = 0;
7  Topics / Home Automation and Networked Objects / Re: Bluetooth mate Auto reset for wireless programming? on: July 05, 2011, 09:51:33 pm
This is awesome!
8  Using Arduino / Networking, Protocols, and Devices / tiny bluetooth module! on: June 30, 2011, 11:40:35 pm
I’m using the silver sparkfun Bluetooth module ( to wirelessly connect my smartphone to my arduino mini. But I need a Bluetooth board that’s smaller for where I’m trying to stick the unit.  I’ve been looking into less beginner friendly but tiny Bluetooth modules like this one -

Will I be able to Rx/Tx easy out of one of these like with the sparkfun board?  The supplier wants to know if I want HCI or SPP firmware, what does that mean?
Thank you for any help you can provide!

Any recommendations for a tiny Bluetooth module would be appreciated as well!
9  Forum 2005-2010 (read only) / Syntax & Programs / Re: SD card shield <FAT.h> library help on: August 15, 2010, 02:31:30 pm
Wow InvalidApple thank you so much for the help!  That's some awesome stuff...

10  Forum 2005-2010 (read only) / Syntax & Programs / Re: SD card shield <FAT.h> library help on: August 14, 2010, 12:49:18 pm
I can't make heads or tails of what's in the library files.  Plus there are a bunch of them.  I tried to scan through but it's way over my newbie head...  Would anyone be able to help?  Here is the library as a zip -
11  Forum 2005-2010 (read only) / Syntax & Programs / SD card shield <FAT.h> library help on: August 14, 2010, 04:47:52 am
I'm using an ebay bought SD card shield with my arduino -

The example doc that came with the library zip gives the very basic functions to write to the SD card.  Is there somewhere where I can see all the functions included in this library?

Specifically I want to know how to write a new line.  Right now I'm using the filename.write(“hello world”); to put all my data on the SD card.  How do I write a new line to organize my data better? (\n doesn't seem to work, but maybe I'm doing it wrong…)

Thank you for any help you can give!!!
12  Forum 2005-2010 (read only) / Syntax & Programs / Re: problem with PWM LED fading on: May 06, 2010, 05:34:58 pm
Thank you so much for the reply Paul.  I didn't do it that much but I have been screwing with it for the last few hours.  Do you think I damaged something?  How would I notice if I damaged something?
13  Forum 2005-2010 (read only) / Syntax & Programs / problem with PWM LED fading on: May 06, 2010, 03:58:27 pm
Just got an Arduino board and I'm new to this cool stuff.  I've been going through tutorials and playing around.

I'm a little confused by the fading example.  What is the purpose of the resistor?  Doesn't the LED provide the resistance?

I've been running the program without the resistor and it seems to work on digital pin 9 (as the program indicates) but if I switch the digital pin to anything else it doesn't work.  If the value is greater than half of 255 then the LED stays on if it is less than half of 255 then it is off.

Please help!  I hope I'm not screwing up the board messing around like this...
14  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: reading a ultrasonic transducer? on: August 14, 2010, 04:48:27 am
Wow this is very helpful thank you!!!
15  Forum 2005-2010 (read only) / Bugs & Suggestions / reading a ultrasonic transducer? on: July 28, 2010, 08:01:19 pm
I'm a newbie.  How do I read from an ultrasonic transducer?

I'm trying to have these two transducers talk to each other –

I was going to have one attach directly to an arduino to emit a pulse.  The arduino itself would generate the pulse timing.  If I just plug the transducer directly into a digital out of the arduino and flip the pin high/low will that be enough power to create the pulse?

The other transducer would attach to another arduino through this opamp –

Will that work?  Is that all I need to make this work?  What am I missing???
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