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1  Using Arduino / Motors, Mechanics, and Power / Re: How can I know the frequency of a RF module of motorized blind ?? on: Today at 05:06:11 pm
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Can you tell the OP how the device linked can tell him the frequency of the signal used in his blinds ? ( I can't)

It's essentially a SDR (Software Defined Radio) and it most certainly can be configured as a scanner.

Don
2  Using Arduino / Project Guidance / Re: Push button mechanism on: Today at 04:59:09 pm
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As a starting point I will point out that normally the Neutral (white) wire is never switched. It is left untouched. Any wiring changes to accomodate switching are done to the HOT (Live) (black) wire.

I will point out that the wire colors used in the United States are not necessarily the same as those used elsewhere.

Don
3  Using Arduino / Displays / Re: Contrast problem using 1602A LCD over I2C on: Today at 04:33:57 pm
I recommend trying the display without the I2C adapter to determine if it works as expected.

Don
4  Using Arduino / Displays / Re: Contrast problem using 1602A LCD over I2C on: Today at 03:19:07 pm
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It may be hard to see in the picture, but the LED indeed seems to be on, it is just the text that is not illuminating correctly.
OK I see that now.  Maybe it is indeed a contrast problem!

I see that the power connections for the I2C adapter are taken from opposite sides of your power supply it the two pictures.  Both sides appear to be configured for 5 volts, but have you actually checked?

You also mentioned disrupting the wiring between the two pictures.  Have you carefully inspected all of your connections looking especially for 'cold' solder joints?

Have you tried the other LCD module?


Don
5  Using Arduino / Displays / Re: Contrast problem using 1602A LCD over I2C on: Today at 10:53:20 am
It's not a contrast problem it is a backlight problem.  The backlight is OFF in your first picture and it is ON in your second picture.

You might want to read through this thread http://forum.arduino.cc/index.php?topic=241928.5 since it deals with a similar I2C adapter.


Don
6  Development / Other Hardware Development / Re: How to burn the bootloader and sketches on Atmega328p-Au on: September 21, 2014, 05:46:28 pm
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Not according to spec sheet. You can safely go up to about 13MHz with 3.3V supply. 16MHz will be overclocking.

That would explain why they seem to be pretty successful running at 16 Mhz.  It's a relatively small amount of overclocking.

Don
7  Using Arduino / Displays / Re: [SOLVED]LCD Liquid Crystal Display Screen only shows squares in top row on: September 21, 2014, 05:17:21 pm
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Yeah. I removed them because you said they were too big, Don.
That wasn't me and it wasn't anyone else either.  You were asked to present them in a different manner, totally removing them is not a good idea.  What we have now is just another fractured thread.

Don
8  Using Arduino / Displays / Re: [SOLVED]LCD Liquid Crystal Display Screen only shows squares in top row on: September 21, 2014, 02:59:31 pm
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It looks to me like you have R/W connected to the arduino and EN is not connected to anything.  R/W (LCD pin 5) should connect to ground and EN (LCD pin 6) connects to the arduino.
I must be missing something.  What are you looking at?

Don
9  Using Arduino / Displays / Re: Adafruit LCD shield - blinking section of display on: September 21, 2014, 12:39:39 pm
That should do it.  I was thinking along the lines of inherent controller commands.

Don
10  Using Arduino / Displays / Re: LCD Liquid Crystal Display Screen only shows squares in top row on: September 21, 2014, 09:59:48 am
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... not everyone is native English speaking

You might want to go back and put some more information into your profile.  You could even get rid of the alien icon next to your username at the same time.

Don
11  Using Arduino / Displays / Re: Adafruit LCD shield - blinking section of display on: September 21, 2014, 09:55:40 am
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Does anyone have any suggestion on how to do this? I've Googled around for a while and can't find anyone that has done this..

I don't think this is possible with any character mode LCD (any HD44780U based LCD).  You can get the cursor or a single character to blink but not multiple characters.

Don
12  Using Arduino / Displays / Re: LCD Liquid Crystal Display Screen only shows squares in top row on: September 20, 2014, 02:15:58 pm
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I have built Crytsal ball project before and at time it worked fine...
Well I don't have a crystal ball so you (both of you) will have to send photographs of your setup.

We will use the photograph(s) to check your wiring of course.  We can also check out your soldering as well.

If you can see a row of boxes and you can vary their intensity with the potentiometer the your power and backlight connections are OK.  That leaves just seven more connections to check out.  Hint: one of them is black on the diagram above.


Don
13  Using Arduino / Displays / Re: Adafruit LCD shield - keeps displaying wrong text on: September 19, 2014, 10:08:05 pm
Go back and 'modify' your original post.  Highlight the portion of that post that is code and press the 'code' button, the one that looks like an octothorpe ( # ).

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Please someone enlighten me!
You are going to have to enlighten us first.

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I've been playing around with the HelloWorld example that comes with their library.
Does this mean that the example worked as provided and you are now modifying it?

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I'm trying to get it to display a string and for some reason it keeps displaying either "Hello World"!
The only string in your sketch is "Hello, world!" so what did you expect it to display? 
You use the word 'either' but you haven't told us what the other something or other is.


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Now, if I change the Serial output to the individual pieces of the String I'm trying to display it works.
It's crackers to slip a rozzer the dropsy in snide.

Don
14  Using Arduino / Displays / Re: Need TTL LCD connection advise on: September 18, 2014, 10:11:28 pm
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Problem here is I am not sure what the data pin on the Pro Mini is supposed to be

I'm afraid that's the least of your problems.  You need a totally different sketch, preferably one that uses the software serial library not an I2C library. 

Have you considered following the Quickstart Guide on the page you linked to?  It even tells you the answer to your question:
  "// Attach the serial display's RX line to digital pin 2"

Don


15  Using Arduino / Displays / Re: EMF arduino on: September 18, 2014, 07:13:34 pm
I saw this procjet:

Code:
http://www.instructables.com/id/Arduino-EMF-Detector/

And my display is show me nothing ? Did any one try this ?

To quote Grumpy_Mike:
"
Most of the people who write instructables are in fact idiots. The only people more stupid are the people who read them, just look at some of the inane comments you get. Try not to get your facts from this source."

Also: The stuff in your 'Code' box is actually a link.  You should have used the 'Hyperlink' button so it would be clickable.


Don
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