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1  Using Arduino / Networking, Protocols, and Devices / Re: 433.92 Mhz garage gate opener on: January 25, 2014, 08:51:07 am
I think that too, and I was wondering if since you can write by there, you can also read the code
2  Using Arduino / Networking, Protocols, and Devices / Re: 433.92 Mhz garage gate opener on: January 25, 2014, 08:31:35 am
Ok, then for now I'll order the RD modules, then when I have them I'll try to intercept the signal with the application shown in the thread you showed.

Just one more thing: since the gate's been recently fixed, my father wants to convert that old black plipper (I learnt a new word today smiley-grin) to work with the new gate's receiver, and he said that he just has to go the hardware store where they can read the transmitter code. Now I don't know which kind of code they read, since it can be used to set up those pins, but I'll ask them this Monday.

I'll post eventual updates! =)
Guys, thank you for now!
3  Using Arduino / Networking, Protocols, and Devices / Re: 433.92 Mhz garage gate opener on: January 25, 2014, 05:57:02 am
It has 2 buttons since it's a condominium with enter and exit gates, so I just have to repeat the operation =)

What should I do if I want to try to read from one of those pins?

... the project was abandoned due to lack of help in doing the Processing code ...
well, I don't know Processing, just heard about, but I'm not bad at programming so if you want to explain me what was exactly that project, and what had to be done, I can consider picking it up smiley-grin
if it's a matter of representing the data, I can do it easily with C# that I have a lot of experience with, just tell me where and how to gather these data


... (and me getting a hardware device)
can you show me the exact hardware you used? so I can evaluate it (and if it costs too much it's a point to Processing smiley-lol)

anyway, will this or this be correct purchases?
4  Using Arduino / Networking, Protocols, and Devices / Re: 433.92 Mhz garage gate opener on: January 25, 2014, 04:15:38 am
Thank you Riva for your attachment, I really appreciate it!
I have some questions:

- in your code, you use a sequence of delays in ns:
380,440,700,800,360,440,720,780,380,440,700,800,360,460,700,780,380,440,700,800,360,800,360,460,720,13000

is that he full sequence that the receiver needs to hear or is it repeated 3 times?
cause it's visible a sort of repetition
380,440,700,800,360,440,720,780,
380,440,700,800,360,460,700,780,
380,440,700,800,360,800,360,460,720
13000

but the last line, 130000 apart (that I think it's a pause), is different, why?

- is it possible to obtain that sequence just using the receiver module?

Also, notice the first set of photos I attached: can that group of 5 pins be useful to the purpose?

Thank you guys!
5  Using Arduino / Networking, Protocols, and Devices / Re: 433.92 Mhz garage gate opener on: January 25, 2014, 03:54:03 am
Hi pico, thank you for joining!

Well, I got the idea yesterday when I realized I will have more free pins than I expected on my current project, so at the moment I don't have the necessary hardware. As I wrote to pico, the main question was whether this project was possible (now confirmed I think), and which hardware should I buy, that pico and now Riva seem to confirm to be a couple of RF transmitter and receiver.
My fear was waste 1/2 months waiting for something that doesn't work for my case, and then wait again til April/May to try again.
If you say this is the setup I need, I'll make the order =)
6  Using Arduino / Networking, Protocols, and Devices / Re: 433.92 Mhz garage gate opener on: January 25, 2014, 02:44:32 am
I'm quite sure it doesn't use rolling code, because it's 20 years old. Also, we have many clones of this remote controllers, one of these coupled to the receiver using 9 3-state pins.

EDIT: photo attached
7  Using Arduino / Networking, Protocols, and Devices / 433.92 Mhz garage gate opener on: January 24, 2014, 11:57:56 pm
Hi all!

I'm working on a project that has to be mounted on my motorcycle, and in this project i wanted to include a clone of the gate opener, so I don't have to take off my gloves every time to open the pocket and search for the remote controller.

I searched a lot on this forum and on Google, but every discussion I found didn't provide a solution to this problem, so now I want to open this discussion to find a definitive solution to this problem.

So here is the problem: I have this remote controller (attachment) that as I read, should work on 433.93Mhz, transmitting a code to the gate's receiver. I have to intercept this code from the remote controller I have, but I don't know to do it.
Many discussions I read suggest to use a couple of RX TX wireless modules, but those discussions died there, as people said they couldn't read any signal using those modules.
What do I have to do?

Thank you guys!
8  Using Arduino / General Electronics / Re: 12v to 5v and energetic saving (from motorcycle battery) on: January 21, 2014, 08:41:35 am
Thank you all for your replies!!
I think I'll go for a step down converter then, since I don't want to waste even a drop of energy!

Just one last advice: is this LM2596 suitable for my bike's battery? I attached a photo of the old one I used, but it should be the same as the new one (if it's needed I'll take it out).
9  Using Arduino / General Electronics / 12v to 5v and energetic saving (from motorcycle battery) on: January 19, 2014, 06:20:58 pm
Hi all!

I'm kinda new to electronics, so I need your help to understand a thing.
I'm in the process of designing a standalone project that has to be mounted on my bike.
It will use an ATMega328, an RTC and +/- 12 LEDs.
I know that I have to drop the 12V provided by the battery to 5V. My inital idea was to use a LM7805, but I found out that with that Vin it would get very hot, so I thought I could use a second LM7809 (XV to 9V) to divide the stress. Is this a good solution?
In addition, I can't understand why I have to waste that energy that becomes heat. Isn't there any device that permits to use only the power you need?
Sorry for the probably idiot question but I'm quite ignorant on the subject.

Thank you all.
10  Using Arduino / Project Guidance / Re: How to choose the microcontroller on: January 18, 2014, 02:57:20 pm
Ok  then I'll buy a 328P-PU, same version mounted on my Arduino UNO R3 =)

Thank you again man!
11  Using Arduino / Project Guidance / Re: How to choose the microcontroller on: January 18, 2014, 08:24:10 am
Question: if you don't know anything about i2c, how did you realise your rtc was faulty?

Because every time I disconnected it from the UNO, even if it had the battery it stopped counting seconds, remaining fixed on the time it was disconnected, to restart counting time the moment it was reconnected to the Arduino =)
Always about I2C, does it work on any μC or is there a feature/sign I have to search for when I need to know if it is supported?

Back to the choice, thank you for your suggestions! I think I'll go for the 328, so I'll be able to add a couple of features.
Last thing: looking on ebay there are many versions of the same uC. Do I have to look for or avoid something?
Also, what's the difference betwenn the square and rectangular, only shape and replacement difficulty?

EDIT: e.g. square and rectangular

Thank you very much for your time!
12  Using Arduino / Project Guidance / Re: How to choose the microcontroller on: January 18, 2014, 06:55:41 am
I already have a 4 digits display, the one with one dot per digit, not 2 in the middle (that would be perfect for a clock). It uses 12 pins.
I also already have the DS 1307. Had to make the ebay seller to send me another one 'cause the first had a problem with the battery power supply (got it replaced free ofc).

I'm also considering to use some LEDs (rencetly bought a 1k pack smiley-grin) and make a binary clock, since I have very little space available, and the 4 digits display isn't even that good looking, whereas I can give LEDs any layout.
But I would still need at least 10 pins down from 12.

I'm now looking at this list. Do I have to care about some specifics to make my rtc work using the i2c? (I don't even know what it is... xD)
13  Using Arduino / Project Guidance / Re: How to choose the microcontroller on: January 18, 2014, 05:54:29 am
Thank you PaulRB for your reply

One more question, in which case should I use an external crystal?
14  Using Arduino / Project Guidance / How to choose the microcontroller on: January 18, 2014, 05:20:11 am
Hi all!
I've built a portable Arduino project, but now I need to build a simple portable clock with a 4 digits 7 segments display and an rtc (DS1307).
On the web I found many guides that explain how to build your own board, and many describing the steps to take to select the best micro for every situation, but I can't understand a thing: how do I know that I can send code to that controller using the Arduino IDE  and my Arduino UNO board?

Thank you guys, you're awesome!
15  Using Arduino / Programming Questions / 2 variables of the same type, 1 private in library, the other in the sketch on: October 01, 2013, 04:04:55 pm
Hi all,
I'm pretty new to C++ and I need help for some very basic info ...

in my library I have a private variable declared as
Code:
int pin = 10;
that gets its value set through ctor injection, so I'll have another
Code:
int pin = 12;
in my sketch to set the desired value.

The compiler tells me
Quote
multiple definition of [...] first defined here
what is the problem?
in the library I did
Code:
private:
   int pin;
shouldn't it be hidden to external code?

thank you for your help! =)
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