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 on: Today at 02:25:57 am 
Started by Apicalis - Last post by Apicalis
Thanks a lot for your advice! It really helped

 on: Today at 02:25:40 am 
Started by Feazzy - Last post by Feazzy
Bonjour B@tto, tout d'abord, merci de nous avoir répondu.

Nous en avons parlé avec notre prof et il nous a dit que ce n'était pas ce qu'il attendait, il nous a parlé de code Ascii ou d'array ...

On comprend vraiment rien à ces trucs la malgré être allé dans les références et avoir fait des recherches... smiley-sad-blue

Si quelqu'un qui connait bien cet afficheur LCD peut nous aider ça serait super, merci !!

On continue de chercher de notre côté et nous vous tiendrons au courant si nous trouvons quelque chose.  smiley

 on: Today at 02:21:45 am 
Started by Dingo509 - Last post by Dingo509
I've tried every combination of "if"s and "else"s i can think of. still nothing.   smiley-sad

 on: Today at 02:20:03 am 
Started by RET80 - Last post by Tobbera
Yes, LiPo for instance. With an efficent step down module, you will not have much loss in converting down the voltage. See eBay for tons of step down voltage converters.

What would be the point of the step down voltage converters if I get a LiPo battery that's 5v or 6v? They do make them in those voltages last I remember.  Unless you're talking about the big LiPo batteries, like the 12-19v ones?

Yes, I was thinking about the bigger ones. If you buy one of a common size and voltage, it might have a resell value when your project is over.

 on: Today at 02:18:21 am 
Started by nilton61 - Last post by nilton61
There is not much to reverse engineer. H-bridge designs are well known. I have a design with 2 irf2184(half bridge drivers) and one 74hc00(glue logic) that works very fine. But the cost and the reliability of a circuit correspond to the number of holes/pads and the number of circuit packages.
So if i can replace the 2 irf2184 and the 74hc00 with one package there is a lot to be gained.

 on: Today at 02:16:28 am 
Started by Robin2 - Last post by Robin2
I just downgrade the baudrate to 9600 and using uart-lib at 19200. Using 250 ticks at first INT1, and 208 at the consecutive ones. Using 209 ticks to TX. Prescaler is /8. Timer0 and 2.

I have no idea what all this means.


 on: Today at 02:14:47 am 
Started by pighixxx - Last post by pighixxx
Ciao Test,

ci sono alcune inesattezze su quel disegno, prima di tutto Il diodo non è zener bensí schottky. E' un disegno originale postato un po' di tempo fa da Rugged Circuit ed è per questo che ho chiesto il parere dei più esperti.
Seguendo il consiglio di Leo si può eliminare completamente la parte di detect del circuito ed utilizzare una soluzione software per il detect.

long readVcc() {
  long result;
  // Read 1.1V reference against AVcc
  ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1);
  delay(2); // Wait for Vref to settle
  ADCSRA |= _BV(ADSC); // Convert
  while (bit_is_set(ADCSRA,ADSC));
  result = ADCL;
  result |= ADCH<<8;
  result = 1126400L / result; // Back-calculate AVcc in mV
  return result;

Entro oggi vedo di ridisegnare il circuito  smiley-grin

 on: Today at 02:13:59 am 
Started by Massimo Banzi - Last post by matwin
Con vero piacere mi sono iscritto a questo forum. Il mio scopo è quello di riuscire a trovare collaborazione tecnica (retribuita) per un mio progetto di un sistema integrato : videosorveglianza + allarme + controllo accessi + automazione. Per le prime tre fasi sono già a buon punto, mi occorre integrare la parte riferita all'automazione. Sarei indirizzato su Arduino Yun oppure Arduino 3.
Spero di avere qualche riscontro da questo forum.
Ringrazio gli autori e vi saluto.

 on: Today at 02:08:07 am 
Started by matelot - Last post by Robin2
(is there an instruction that reads four inputs and gives a number between 0 and 15?)

If you organize your inputs onto adjacent pins in the same Atmega port you can read all at the same time using PINx where x is the port number. For example to get a 0-15 number from pins 8-11 on an Uno you just need two lines of code

byte myVal = PINB;
myVal &= 0b00001111; // to zero the irrelevant bits 7-4

Also, (unless I am missing something) you seem to be making a bit of a mountain out of the business of selecting which set of bit values you want to output.

Why not define all the values in a 2-D array at the same time and then just use the input value to select the relevant row of the array? (not sure if this is the right way to do it - but someone else will quickly correct me)

byte a[]={
                     {B11111111,B01111111,B00000111,B00001011,B00010011,B00100011,B01000011,B10000001} ,

Then your code would be something like this

void displayThem(byte row) { lc.setRow(0,0,a[row][0]);  .....


 on: Today at 02:03:05 am 
Started by greatidea - Last post by Peter_n
You will find many problems with DS1307 and DS1302 on this forum. The modules from Sparkfun and Adafruit do work, but many modules from Ebay don't. I read once that someone used a trick by switching the power, but I can't find it in the forum right now.
The new DS3231 has a crystal inside the chip and will run, even the cheap modules from Ebay.

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