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1  Using Arduino / Project Guidance / Re: Arduino Pro Mini 5V or 3.3V? on: February 21, 2013, 07:58:59 am
great thank you
2  Using Arduino / Project Guidance / Re: Arduino Pro Mini 5V or 3.3V? on: February 21, 2013, 05:46:53 am
ok, thank you.
And one more question about powering the ProMini 5V Board.
Can i just get a cheap 5V 1A power adapter and connect it to the Mini? Or is it better to use a 7V adapter?

And than there is a VCC and Raw pin, right? DO i connect the adapter to raw or VCC?
3  Using Arduino / Project Guidance / Re: Arduino Pro Mini 5V or 3.3V? on: February 20, 2013, 02:38:47 pm
and may i add a question regarding the USB Connection. To use it i need an FTDI Board, right? So sth. like this

http://www.watterott.com/de/FTDI-Breakout-Reloaded-V11
http://www.ebay.de/itm/FTDI-Basic-Breakout-5V-3-3V-Arduino-Compatible-/170842966243?pt=LH_DefaultDomain_0&hash=item27c708c8e3

But when i look at those boards, they all have a 6-PIN Header [DTR,RX,TX,VCC,CTS,GND], but when i look at pictures of MiniPro Boards they dont have the same PIN's:

e.g.
http://www.ebay.de/itm/New-Version-Pro-Mini-Atmega328P-5V-16MHz-For-Arduino-Compatible-/170968687934?pt=LH_DefaultDomain_0&hash=item27ce87253e
[DTR,RX,TX,VCC,GND,GND]

http://arduino.cc/en/Main/ArduinoBoardProMini
[??,TX,RX,VCC,GND,??]

I'm a bit confused about that???? smiley-wink
4  Using Arduino / Project Guidance / Re: Arduino Pro Mini 5V or 3.3V? on: February 20, 2013, 02:05:59 pm
ah ok, so mabye the easiest way for me still is to use a 5V Board, just because all my other boards are 5V too, which makes testing easier.
So i dont have to to anything with the logics? But i would have to reduce the 5V to 3.3V for the power. Is that easy?
5  Using Arduino / Project Guidance / Re: Arduino Pro Mini 5V or 3.3V? on: February 20, 2013, 01:46:59 pm
ah ok, so it's ok when the logic connections are 5V, good to know.

Is there any disadvantage with using the 3.3V Version?
And the 4V Mini Pro doesn't have a 3.3V Pin, right? So the VCC Pin is either 5V or 3.3 depending on the Board?
6  Using Arduino / Project Guidance / Arduino Pro Mini 5V or 3.3V? on: February 20, 2013, 12:16:23 pm
Hello,
im planing on building some sort of wireless home control. Therefore i ordered a few of these NRF24L01+ Modules (http://www.ebay.de/itm/SainSmart-New-Arduino-NRF24L01-Wireless-Transceiver-Module-2-4GHz-100m-range-/320951854865?pt=Bauteile&hash=item4aba38a711). The specifications say "1.9V-3.3V Vcc input".
I want to use them with a small Arduino Board, so i thought about the Arduino Pro Mini, on the product page it says that the board is available in a 5V and 3.3V Version. All other Arduinos (Uno, Mega, Nano) are 5V, right? So what Board should i use?
If i bought the Arduino Pro Mini 5V, how could i use the Wireless Module? Or is it better to use the Pro Mini 3.3? Is there any disadvantage with the 3.3V Board?

But still, how can i use the Wireless module with my other 5V Arduinos?

Thanks a lot
 Dennis
7  Using Arduino / Project Guidance / Re: Arduino NANO Pinout Diagram on: February 11, 2013, 06:01:47 am
thanks a lot - again !
8  Using Arduino / Project Guidance / Re: Arduino UNO Pinout Diagram on: February 11, 2013, 05:35:25 am
Thanks a lot!!
9  Using Arduino / Programming Questions / Re: PCF8574 writing specific bit on: February 07, 2013, 05:03:25 am
ah ok,
regarding the bit set funktion:

Code:
          byte state = I2CIORead();  // is 00000000
          bitSet(state,1);
          Wire.beginTransmission(I2CIO);
          Wire.write(state);
          Wire.endTransmission();

This sends 01000000 to I2C, right? At least it seems to work.
But how do i set it back to 00000000 ? The bitSet() funktion is only able to set the bit to 1, not 0  !?!?!
10  Using Arduino / Programming Questions / Re: PCF8574 writing specific bit on: February 07, 2013, 04:08:02 am
hmm, i dont really get the bitset(), do i understand it right, that i can change a bit of one byte?
If thats the case, do i always send a full byte to the PCF and can not send a single bit?
11  Using Arduino / Programming Questions / Re: PCF8574 writing specific bit on: February 07, 2013, 03:58:22 am
yes, thats only the part where i actually write to I2C..
ok, never heard of bitSet(). I'll look into it.

Btw. Can i use the same PCF8574 to Input and output at the same time? Because in that case. How does the Chip know which ports to use as input and which as output?
12  Using Arduino / Programming Questions / PCF8574 writing specific bit on: February 07, 2013, 03:42:24 am
Hello,
im using a PCF8574 via I2C but i dont know how to write or read from one specific port. I have my LED at P1 and want to turn it on/off. At the moment i do this

Code:
Wire.beginTransmission(I2CIO);
Wire.write(B11111111);
Wire.endTransmission();

But this way i rewrite every bit, so if i changed another LED at P3 before, i overwrite it now. So i need to write only the bit for P1, but how do i do that?

Thanks
13  Using Arduino / Programming Questions / Re: Intervall within an intervall (wihout delay) on: February 06, 2013, 06:08:03 pm
works perfectly.
Thanks a lot
14  Using Arduino / Programming Questions / Intervall within an intervall (wihout delay) on: February 06, 2013, 05:41:14 pm
Hi,
i want something to happen every x seconds for y seconds. So i tried this:

Code:
void PressTrigger(){
 
 if((millis()-TriggerTimer)>(Delay*1000)){
  digitalWrite(Trigger, HIGH);
  delay(500);
  digitalWrite(Trigger, LOW);
  TriggerTimer = millis();
 }
}

So the first level works fine. The if is executed every x seconds. Every x seconds i want the Trigger to be HIGH for y seconds (here 500ms). But how can i do this within the first condition without using delay?

Thanks
 Dennis
15  Using Arduino / Programming Questions / Re: if with milles does not work on: January 08, 2013, 11:12:54 am
smiley-wink
Thanks again
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