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Generale / Re: Led RGB indirizzabili
Last post by fratt - Today at 09:58 pm
Puoi sempre prenderne 2 da 5V 10A
Ma li uso separatamente ognuno per alimentare una striscia? Non credo ci sia un modo per "unire le forze"...
Perdona l'ignoranza, ma non è il mio campo.

Sull'eventuale dissipazione di calore che mi dici?
Se metto tutto (a parte l'alimentazione) dentro una scatola 11x11x35 cm rischio qualche problema?
Français / Re: Achat : quelle base Arduin...
Last post by 68tjs - Today at 09:57 pm
Les kits "européens" de résistance sont de l'arnaque, les vendeurs vendent à prix d'or des résistances qui ne serviront jamais comme des 4,7 megohms.
Les valeurs utiles sont
100, 220, 330, 470, 1k, 2,2k, 4,7k, 10 k et on ne sait jamais 100k.

- Les 100, 220, 330 et 470 ohms c'est pour les résistances série des dels (leds).
- Les 1k, 2,2k, 4,7k c'est pour les résistances de charges de l'I2C ou les résistances de base des transistors bipolaires.
- 10 k c'est pour la protection des grilles de Mosfet.

Pense aussi à prévoir quelques potentiomètres (10 tours) : 2,2k, 51,1k
Ajoute quelques dizaines de condensateurs : 100nF céramique et  condensateurs chimiques autour de 10µF à 47µF --> la valeur n'est pas précise prend ceux qui seront les moins cher le jour de ton achat.
Attention les chimiques ont une tension de service, prend 25V comme cela si tu utilises une alim 12V tu sera couvert. avec un chimique on prend toujours une marge de sécurité.

Ces valeurs peuvent s'acheter individuellement mais il faut voir aussi les lots disponibles sur Ebay, Aliexpress ou autre : il y aura peut-être des offres avantageuses le jour où tu passera commande.
Programming Questions / Re: WHich loop to use and when...
Last post by 232 - Today at 09:57 pm
Another thing to keep in mind is NOT to use FOR or WHILE loops if they take any appreciable time to complete - anything more than 100 microsecs or thereabouts - as they block the Arduino from doing other things until they complete.

If you need to repeat something that takes longer then just allow loop() to do the repetition and test the condition with IF


This is where this often repeated mantra, in variety of ways,  does disservice because it makes such forceful and general statement.
Such statements are often justified , in this case not explicitly, to be of benefits to beginners.
There are few things in Arduino (concept)  . allow ME to be general, which since its conception have been problematic for beginners.
Concept of "hiding the main() " and  letting the loop() to control the program flow being one of the major issues.
IMHO It essential y keeps the beginner from fully understanding the software process - both  development and debugging and encourages  blind  "cut and paste".
Any hobbyist who gets bitten by the "making robots go " bug soon realizes limits of Arduino ways, like it or not.
And the majority who are happy with blinking LED's soon find another hobby.

Like it or not, they just ignore posts like yours and mine.

That is reality and it is naive to think otherwise.

Off soap box, got some SPI code to work on...


Deutsch / Re: Fehlerhaftes Gerät?
Last post by Rentner - Today at 09:55 pm

@andi was macht der Blink Skatch  aus den Beispielen , läuft er , was macht die serielle Ausgabe dazu die ich mal angesprochen habe.

Du gehst ja davon aus das die Hardware defelt ist , dann ist das ein supi Beispiel um das zu Testen.
Deutsch / Re: Paralleles PWM Signal erze...
Last post by uxomm - Today at 09:55 pm
Also mit tone kannst du ein 50% PWM Signal ganz einfach an einem beliebigen Pin erzeugen. Frequenzen zwischen 30 Hz und ca. 65 kHz sind möglich. Das verwende ich für Lichtschranken und funktioniert klaglos.

Die Frage ist wie du das empfangen willst - dazu brauchst du Empfänger. Wahrscheinlich welche, die "Continous Mode" beherrschen. Zum Beispiel: TSSP58038
Hardware / Re: Dos 328p con un solo oscil...
Last post by surbyte - Today at 09:54 pm
No veo lo que vaya a ganar, tendra que armar un oscilador con un driver que soporte la carga tal vez infima de los 3  ATmega328.
Tampoco entiendo que pueden hacer 3 ATmegas cuando uno solo mas grande y potente hace el trabajo de 3.
Un DUE por ejemplo.
Sensors / Re: Astounding "hobby" LIDAR g...
Last post by Koepel - Today at 09:51 pm
That 3D data is amazing, even without the music ;)
Project Guidance / Re: PLEASE HELP ME
Last post by TolpuddleSartre - Today at 09:50 pm
Please post your code too.
Displays / Re: lcd.clear is'nt working we...
Last post by surbyte - Today at 09:49 pm
@arielsho04 don't cross post threads!!
Your thread in section Other SOftware Development has been removed
Displays / Re: 2.8" TFT LCD Shield SD Soc...
Last post by david_prentice - Today at 09:49 pm
From the current UTFT version.txt
Code: [Select]

2.81 21 May 2015  -  fixed a bug which stopped the library from compiling with Arduino 1.6.x
2.82 12 Jul 2016  -  added support for the new 3.2" (Rev2 ILI9341-based) display module from Coldtears
TFT controllers used only by display modules and shields that have been retired are now disabled by default

Version 2.8.2 does not have an entry #32.   v2.8.1 was released well before File date 3/31/2016.   I can only assume that you have a hacked version.

If it works with HX8347-I then you are fine.   Note that
Code: [Select]

#define HX8347A 0

implies that Mr Karlsen supported HX8347-I as the very first controller.


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