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256  Using Arduino / Microcontrollers / Re: Updating the mighty-1284p core on: May 01, 2014, 08:32:12 pm
@Coding Badly
Quote
# Full Swing Oscillator; Start-up time: 16K CK + 65 ms; Crystal Osc.; slowly rising power; [CKSEL=0111 SUT=11]
Quote
bobuino.bootloader.low_fuses=0xF7
You helped me out of a previous situation where I experienced 1284 problems on a bread application.
THANK YOU!
Others have not see the problem probably do to a different circuit layout, ground plane etc.
This points to my following conclusion, if several people have seen the problem and others not, there must be something borderline or on the verge of not working.
Since a slight change in layout fixes the problem, we are playing with a situation which can/could raise it's ugly head as a bug or intermittent.
I for one will always use full swing (at a small cost of power) as it totally solves the problem, besides I have enough problems laying in wait.
Thank you Coding Badly and Crossroads!
257  Using Arduino / General Electronics / Re: Hey guys, does anyone know how to use two breadboards with only one arduino uno? on: April 29, 2014, 06:11:35 pm
Just use a jumper from one bread board to the other.
Do you know how to use the power bars/rails on the bread board?
http://www.instructables.com/id/How-to-use-a-breadboard/
Or
https://learn.sparkfun.com/tutorials/how-to-use-a-breadboard/all
258  Using Arduino / General Electronics / Re: Help me improve my dire first attempt at soldering on: April 29, 2014, 06:01:10 pm
Need more heat, less solder, liquid flux.
What diameter solder are you using?
259  Using Arduino / Project Guidance / Re: How to connect the Magnetic Sensor with arduino for my Tachometer Project on: April 29, 2014, 09:20:09 am
IMO use  a LM339.
May have to play with 20meg feed back resistor for your particular pick up coil.
260  Using Arduino / Project Guidance / Re: How to connect the Magnetic Sensor with arduino for my Tachometer Project on: April 29, 2014, 01:06:14 am
Look at page 18, this may be what you need or a facsimile  there of.
http://www.ti.com/lit/ds/symlink/lm339-n.pdf
261  Using Arduino / General Electronics / Re: "Supplying voltage via the 5V or 3.3V pins [...]" to what? on: April 29, 2014, 12:47:34 am
@Crossroads
Should this also be done on a Pro Mini also?
262  Using Arduino / Project Guidance / Re: Interrupt on: April 29, 2014, 12:36:04 am
@udrkapuduwa
You don't need to use an interrupt to do this.
Is this an assignment and are you forced to use interrupts?

@rohanth
Click the new topic button in the top right hand corner of the forum you want.
263  Using Arduino / Project Guidance / Re: new to arduino - LCD + Keypad + serial packet question on: April 28, 2014, 10:55:35 pm
Check into a Arduino Pro Mini.
https://www.sparkfun.com/products/11113
Available on eBay for $4.00
http://www.ebay.com/bhp/arduino-pro-mini

You can use one mini to handle the keyboard and a 2nd mini for the display.
264  Topics / Product Design / Re: Front Panel Design software on: April 28, 2014, 10:30:22 pm
http://forum.arduino.cc/index.php?topic=219747.0
265  Using Arduino / Project Guidance / Re: Automatic Drawer Light on: April 28, 2014, 10:05:23 pm
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I can assure you it does as, when I was about 6 my parents got their first fridge, I was allowed inside it (before it got cold) to see for myself that the light went out! I guess that I've always been a skeptic.   

 smiley-eek
That's why the doors don't latch any more.
266  Using Arduino / General Electronics / Re: Why does this circuit work with no ground? on: April 28, 2014, 10:02:23 pm
Current goes from +5 to the LED to the resistor to the pin to 0volts.
Therefore you have a complete path for current flow.
267  Using Arduino / General Electronics / Re: Why does this circuit work with no ground? on: April 28, 2014, 09:52:42 pm
If you are applying 5v to the circuit then the pins themselves provide the ground when they go LOW.
268  Using Arduino / Project Guidance / Re: measuring AC voltage with an analog input pin. on: April 28, 2014, 05:09:38 pm
Why not use a transformer, for example 120vac to 12 vac, then rectify and apply to a divider?
269  Using Arduino / General Electronics / Source for surplus parts on: April 28, 2014, 04:43:48 pm
I use to order from this company many years ago and have recently come across them again.
I thought new people to electronics might find some of the parts they sell interesting and may be applicable for some Arduino projects.  I am not affiliated with these guys.

http://www.goldmine-elec-products.com
270  Using Arduino / Audio / Re: Problem with buzzer - Arduino Leonardo on: April 28, 2014, 02:30:48 pm
I assume you set pinMode(6,OUTPUT); when you use pin 6 etc.

Also:
Some buzzers are self contained, that is they will only produce a resonant tone o/p.
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