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General Electronics / Re: Multi antenna as one!!
Last post by DimitrisTzam - Today at 12:59 am
I want to thanks all of you for your replies.
This post is much more educational purposes than practical. I want to learn more about antenna array but on the Web I can't find helpful information. Then maybe I would try to make one as a project. I want a receiver antenna array to receive video on 900MHz-5.8ghz.
General Electronics / Re: Nichrome (Kanthal) wire lo...
Last post by cr0sh - Today at 12:59 am
Now the interesting thing about the hot air gun that I suggested - or an equivalent hair dryer - is that the fan motor actually operates from something like 12 Volts.

So a dirt cheap 1500 W hair dryer would adapt perfectly to this requirement of 40 W operation from an 18 V supply. :smiley-lol:

It probably would, but you would have to take the hair dryer apart, and wire the motor separately from the heating element, as the way the voltage is dropped is usually by using the heating element as a very large resistor with the motor placed in series (IIRC).

Other than that detail, it would probably work fine.
Project Guidance / Re: project 4 digit 7 segment ...
Last post by Delta_G - Today at 12:58 am
thanks delta_g i can now display numbers 1234 on the 4 digit seven segment display quite easy and but still dont know hot to interface it with rtc im going to give up and ask for some spoilers if any one can help me out a bit also went with basic rtc for now ds1302 module
Forget the 7 segment for a minute then.  Can you get the time into the Arduino and display it on the serial monitor?
Project Guidance / Re: fastening RGB Rotary to a ...
Last post by cr0sh - Today at 12:56 am

Ok - that's a bit different from the original one posted. Here's what I would do:

First, solder your wires to the board from the rear of the PCB.

Then, on the panel where you have your hole drilled for the shaft, epoxy a couple of pieces of plastic the width of the PCB, so that the PCB fits flush to the top of the plastic pieces (or near enough). The best way to do this would be to insert the shaft thru the hole, position the PCB, and mark with a pencil or sharpie each edge (or an outline) of the PCB. Then measure the PCB, and verify the markings. Then cut/trim the plastic pieces and fit them in place on the panel. If you are careful with the epoxy, you could even position the plastic pieces using the PCB as a guide, until it sets (just don't get any on the board, shaft, etc).

Once the epoxy has set up, put the shaft in place, then use a small piece of plastic as a bracket and screw it down over the back into the plastic side pieces. The first pieces of plastic are to keep the board from rotating, while the backing piece of plastic is to keep the module from falling out of the panel or otherwise becoming loose.

Variations of this idea are also possible (perhaps a couple of plastic tubes mounted so that a couple of zip-ties could be used to secure things). Alternatively, you could goop it on with some silicone (or as mentioned by others, hot glue). If you don't think you'll need to replace the part, drill the hole in the panel slightly smaller (use a drill the next barest amount down in size, then ream the hole slightly larger), and press fit it in, then use dots of epoxy along the edge of the encoder/pot and panel.
Programming Questions / Re: COMMAND OR FUNCTION
Last post by Delta_G - Today at 12:55 am
They are functions. 
Generale / Re: [OT] - QUESTIONARIO DOMOTI...
Last post by vbextreme - Today at 12:54 am
la ripetitività serve per valutare le risposte date precedentemente, viene anche usata per vedere se il questionario stesso ha apportato cambiamenti nel vostro modo di pensare.
Anche la scarrellata di pseudo preventivi ha un bel fascino.
Infine @pablos quella domanda che sembra tutta vera in realtà scompone le domotica e ti fa selezionare cosa secondo te è più importante, viene poi comparata con gli altri risultati.
Vi hanno strizzato il cervello ;p
Programming Questions / Need REGEX Help - nano RC file
Last post by Krupski - Today at 12:52 am
Hi all,

Sorry not exactly an AVR programming question, but it is a "programming" question, so hopefully it's in the right spot.


I'm trying to make an RC file for the nano editor to "syntax" highlight Intel HEX files (generated by avr-gcc and read by AVRDUDE).

What I want is something like this:


This breaks down into:

: (start marker)
10 (data length)
0230 (address)
(record type)
(16 bytes actual data)
65 (checksum)

not those exact colors of course, but I want to highlight the data length, address, record type, the data itself and the checksum.

I can't seem to figure out how to skip a part, then highlight a part, then skip the rest... the best I can seem to manage is (using "start=" and "end=") just two different colors.

Any nano and regex guru able to help me? I'd really appreciate it!

Cheers will have a look through this in the morning
Programming Questions / COMMAND OR FUNCTION
Last post by BIGMAC1 - Today at 12:52 am
A couple of questions

I want to know if

1. digitalWrite() is it a command or a function
2. delay()_ a command or function.
Programming Questions / Re: Everything STOPs code [PRO...
Last post by aarg - Today at 12:48 am
You can create a boolean variable and then use it later, to control whether the program should "use" the BMP. That makes it an option that you don't have to configure.
Code: [Select]
    BMPInstalled = true;
    Serial.print("no BMP085 detected");
    BMPInstalled = false;

if (BMPInstalled)
{ // use it...}
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