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Hardware / Re: Localizzare segnale radio
Last post by vbextreme - Today at 03:06 pm
se vuoi puoi usare anche dei segnali di fumo...
Ovvio xbee, hai quello!
Hai già tutto quello che ti serve, devi solo inviarlo a destinazione, a proposito la ricevente la puoi programmare tu?
Project Guidance / Re: Property Monitoring
Last post by dave-in-nj - Today at 03:05 pm

start here

Hardware / Re: Localizzare segnale radio
Last post by walter4991 - Today at 03:02 pm
L'unica soluzione sensata è inviare il segnale GPS ogni secondo.
hai già il GPS! non devi aggiungere altro peso e sei sicuro al 99% di ritrovare il tuo copter
Volendo seguire questa strada, cosa potrei usare per inviare e trasmettere le coordinate? Solo XBEE? Potrei riuscire a sfruttare trasmettitore e ricevitore del telecomando?
Displays / Re: MAJOR improvements to Col...
Last post by ghlawrence2000 - Today at 03:02 pm
I thought it had been a little quiet on my latest ambitions, so just a small update.

For those of you with CTE font ic's, I am sure by now you have realised the major shortcomings, namely no ability to add new fonts!

It is my intention to rewrite the entire font ic contents and supporting library to offer the ability to not only upload additional images, but also additional fonts. Or maybe I will create another library as an add-on. Early days yet, so no firm plans, but I have now got the PC font converter written which was likely to be the biggest problem.



Hi Qwseyvnd

I want to use PROGMEM to store 10 of 10 coordinate Points for SID/STAR waypoints;
You want to store the co-ordinates for 10 waypoints, and then bring one at a time into SRAM, is that right? Or do you need to store more waypoints than 10?

How much data do you need to store for each waypoint?  Is it just two floats?

Code: [Select]
float coordX;
float coordY;

If so, that is 8 bytes per waypoint or 80 bytes in total.  That is less than 1% of the 8KB SRAM on the Arduino Mega. 

If you are really concerned that this 1% will cause a problem when you have written your complete program, then you could use an external RAM or FRAM chip accessed via I2C or SPI.


Project Guidance / Re: Spirit level help
Last post by Cbrenn0823 - Today at 02:57 pm
That looks right, I'm on my phone so I will have to try at home.

Thanks guys :)
Arduino Due / Re: Multi-threading question
Last post by SurferTim - Today at 02:57 pm
Blink without delay may be your solution. It is in the Examples - Digital in IDE 1.6.5.

You won't get a lot of help if you can't post your code. Is there something you think you are doing that we haven't seen before?

Displays / Re: 3.2 inch TFT IPS 480 x 320...
Last post by rowboteer - Today at 02:55 pm
nothing is happening :(

is their any changing in pin declaration ?
I tried the UTFT library with the settings as mentioned by AVR_fred and they work fine with this display.  Try the example "Arduino (AVR) > UTFT_Demo_480x320". Make sure you have the latest UTFT library installed.
The setup line UTFT myGLCD(CTE32HR,38,39,40,41); works fine.

The UTFT library has a lot of nice features but graphics plotting speed is quite slow on a UNO/Mega.
Here is your code more properly formatted for readability using the auto format feature of the IDE (Ctrl T) and posted in code tags (</>).  Note that each { and } get their own line.

Code: [Select]
int moisture_val;

void setup()
    pinMode (13, OUTPUT);
    pinMode(7, OUTPUT);
    pinMode(8, OUTPUT);
    pinMode(9, OUTPUT);
    digitalWrite (7, HIGH);
    digitalWrite (8, HIGH);
    digitalWrite (9, HIGH);

void loop()
    for(int x = 0; x < 3; x++)
        moisture_val = analogRead(x);
        Serial.print("moisture sensor reads ");
        Serial.println( moisture_val );
        if (moisture_val > 800)
            digitalWrite (13, HIGH);
            digitalWrite (7 + x, LOW);
            digitalWrite (7 + x, HIGH);
            digitalWrite (13, LOW);
Local Groups / Re: Napa County
Last post by 68tjs - Today at 02:53 pm
Pretty sure that's 2 names for the same thing.,
Different thing.
I2S is for interconnecting AUDIO devices
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