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Project Guidance / Re: Powering a bunch of nano's
Last post by Paul__B - Today at 01:11 pm
A long run of 5 V cabling might not be a good idea.  It might be more appropriate to use a number of 5 V supplies - aka "phone chargers" to supply a few Nanos each.  Do include the capacitors.

If you are not using the USB functionality of the Nanos, you could use Pro Minis.  One programming adapter could set them all up.

Now you describe
I'd be using one output from each Nano to trigger an input on a centralised Mega which in turn sends a string via serial to a PC.
I suppose you think you need a Mega to handle all the connections.  No way!

If you use Pro Minis, you chain the serial output of one to the serial input of the next.  Each has an "identity" (just a number will do, or in fact an ASCII character) and passes on messages received or adds its own message.  The last Nano - which may or may not share the same function as all the others - generates the message to your PC.
I do not know that much about ESP8266, but if I would venture into using the String class, I would program my sketch to monitor the amount of free, dynamic memory very carefully. If at any point the available memory drops below 5-10%, I would "alarm the user" somehow (eg. network event, an LED lighting  up).
The amount of free memory doesn't tell you anything about the fragmentation level.
Programming Questions / Re: Why is this randomising co...
Last post by AWOL - Today at 01:07 pm
It looks like it won't work because I have a 180 degree servo and that is saying the servo to go bellow 0 degrees.
Have another guess
It looks like it won't work because I have a 180 degree servo and that is saying the servo to go bellow 0 degrees.
Deutsch / Re: Zeigt her eure geilen Proj...
Last post by HotSystems - Today at 01:02 pm
OT: ... und dennoch sind die Posts von Crazy hier in diesen Thread nutzlos und gehören (inkl. unserer Kommentare drauf) GELÖSCHT/ENTFERNT.
Da gebe ich dir Recht.

Also Uwe, bitte löschen.
Software / Re: Problema Reloj DS3231
Last post by ArduMyth - Today at 01:02 pm
Encontre el siguiente codigo:
Pero yo tengo un DS3231 y no se como convertir el codigo con la libreria DS1307 a DS3231. Espero puedan ayudarme, ya que no estoy muy metido en el tema.
En vez de estar buscando códigos por ahí, ve a la documentación de la librerías que uses y revisa tanto las explicaciones como los ejemplos: RTClib

Copiar sin más da cómo resultado estas cosas. Te has quedado sin saber cómo seguir y era cuestión de cambiar una línea...

Lean no sólo copien ;)

I currently have Arduino 3.2 tft lcd  , TFT 3.2 Shield compatible with Arduino Mega2560  and mega 2560 board. my lcd screen is white asoon as I power it up. I have tried various sketches from online but all im getting is a white screen .
can anybody help me please?

Thank you

Deutsch / Re: Datentransfer Waage - Ardu...
Last post by patrickk83 - Today at 12:58 pm
Vielen Dank für diese nützliche Info!

Kannst du mir eventuell einen Konverter empfehlen? Gibt es da vielleicht sogar was als Shield?

Project Guidance / Re: Arduino mega 2560 gets ver...
Last post by Paul__B - Today at 12:58 pm
Remove the AMS1117 and polyfuse.  For a 3D printer, you cannot use the on-board regulator anyway - I suppose you have found that out.

Get a 5 V regulated power supply of some sort (with short-circuit protection), adequate to provide the necessary current, and connect it to the 5 V terminal of your Mega in addition to whatever other components require 5 V.  The 5 V terminal is really an input, not an output.  If that does not work, replace the Mega 2560 and remember not to use the on-board regulator on the new one.
Hello, I have an arduino board mega 2560 and I used the arduino to control a servo with a joystick input.
I tried to disconnect the arduino from my computer and instead use a 11.1v LiPo battery to power up the arduino, I've connected the plus terminal to the Vin pin and the negative one to the GND.
At first, the arduino seemed to work fine but when I moved the joystick too much and to quickly, the servo moved fast and made the arduino board shutdown. This issue repeated it self many times and nothing seems to fix it.

However, when I've connected the arduino to the computer, the servo was able to move fast without making the arduino shutdown.
In case you're wondering, The C rating of the battery is very high(around 20) and it's capable of powering up this small servo without any problem.

Does anyone know what's causing this problem and how to fix it?
If so please let me know.
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