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31  Using Arduino / Audio / Re: Can anyone recommend a voice recognition module? on: June 19, 2014, 06:01:32 am
I have both the EasyVR 2.0 and Voice Recognition Module Rev2 modules.
I can say that the EasyVR 2.0 is much better than the Voice Recognition Module Rev2.
It has greater accuracy of recognition, a 3ft+ range with included mic and more options, worth the extra $$ to me. I use one in an Arduino A.I. project.
I bought my EasyVR 2.0 from Sparkfun , they sell the module on a shield.
32  Using Arduino / General Electronics / Re: making a potentiometer that has a low range of resistance?i on: June 16, 2014, 07:10:36 am
How about a max of 22 ohm? or 12 ohm?
Use a 2 ohm resistor in series with a 20 ohm  potentiometer.
2 ohm min, 22 ohm max
Or 2 ohm resistor in series with a  10 ohm potentiometer.
2 ohm min, 12 ohm max
33  Using Arduino / Project Guidance / Re: Sound recognition on: June 08, 2014, 06:23:55 am
Out of the box the EasyVR 2.0 shield does not work well with moderate background noises present, as any noise loud enough will trigger the shield.  Once triggered it takes several seconds to pickup/compare/respond and go back into listening mode. With enough background noise this just becomes an infinite loop.
Definitively would need a pro quality mic to isolate the area your monitoring.
With that said it can be used to respond to different types of whistles.
Of course the biggest challenge is having the bird patiently sit and sing to the shield while you program it to recognize that birds song.
It would most likely work best if it was indoors like for a parakeet/parrot. As it's the same bird always singing the pitch won't vary as much as it would of different birds of the same species in the wild.
34  Using Arduino / Project Guidance / Re: how to listen online radio using arduino on: May 17, 2014, 05:39:15 am
Maybe Maniacbug's project is of interest to you: Arduino on Ice: Internet Radio via Shoutcast
35  Using Arduino / General Electronics / Re: how many minutes or seconds does a RTC 1307 missing each month. on: May 14, 2014, 04:57:37 am
I bought a DS1307 module off an ebay auction for $0.99 been running since 6/13 in a talking clock/thermometer project hasn't lost a full minute yet.  Must be lucky.
36  Using Arduino / Programming Questions / Re: Uploading to Xively on: May 01, 2014, 06:16:46 am
Checkout how it was done here and here .
The Xively parts of the code can be modified to work with your sketch.
37  Using Arduino / General Electronics / Re: oh no not P-channel MOSFETs again! on: May 01, 2014, 05:50:20 am
Seems like what you said earlier that the led array is the cause of the LEDs turning off slowly.
If using a resistor in place of the array gives a "perfect square wave", then some changes need to be made in the array circuitry for a quicker shut off.
Have a link to the LED array you are using?
38  Using Arduino / General Electronics / Re: oh no not P-channel MOSFETs again! on: April 30, 2014, 06:39:59 pm
Voltage divider at base of transistor keeps it at 10v.
How would it get to 0V? Try removing R8.
39  Using Arduino / LEDs and Multiplexing / Re: Long LED strip starts to bug out at last two feet or so on: April 03, 2014, 06:03:40 am
Try connecting the + and - leads from power supply to both ends of the strip.
Add a 220 to 470 ohm resistor on the data line, also placing a 1000uF cap on the + and - of the strip can help with power issues as stated in this article towards the page bottom.
40  Using Arduino / Sensors / Re: a3144e hall effect sensor on: March 14, 2014, 07:12:12 am
41  Using Arduino / General Electronics / Re: Good quality cheap multimeter on: March 06, 2014, 09:10:12 am
I use the MS8268 for under $30
If you need inductance and temp. readings then:
MS8269 for under $40

42  Using Arduino / Sensors / Re: NewPing Library: HC-SR04, SRF05, SRF06, DYP-ME007, Parallax PING))) - v1.5 on: March 04, 2014, 07:54:00 am
You want it to print mm instead of cm in the console?
If so change the abbreviations in the sketch:
And do as  john21403 says to mathematically  convert cm to mm.
43  Community / Exhibition / Gallery / Re: Hot Yet? (a tiny85 project) on: March 03, 2014, 07:03:18 am
Very cool smiley-cool ... or hot  smiley-evil
My 85s should be here this week, great project to play around with.
The wrist band idea is neat, could be done with a few segments of an RGB strip.
44  Community / Exhibition / Gallery / Re: Just to share... (5 x 10watt RGBs) no current regulation! on: February 24, 2014, 06:57:41 am
cjdelphi, been back to your desktop lately?
Still hoping you'll post the sketch you used to achieve this.
45  Community / Exhibition / Gallery / Re: Just to share... (5 x 10watt RGBs) no current regulation! on: February 15, 2014, 06:25:03 pm
Thanks that will be great.

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