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1  Using Arduino / General Electronics / Re: standalone arduino on: September 15, 2014, 06:28:47 am
That's it!
I build a pull-down system for the resetbutton.
The + and - line of the breadboard in the documentation was reversed from my board.

THanks for looking and answering.

I don't understand where the 100nF cap must be placed. Simply between 5V and GND at the Atmega?

Johan
2  Using Arduino / General Electronics / Re: standalone arduino on: September 15, 2014, 04:32:41 am
Hmmm...
Caps-Lock problem...
MHz, pF - mhZ, Pf.

But: my question...  smiley
3  Using Arduino / General Electronics / Re: standalone arduino on: September 15, 2014, 03:46:14 am
 smiley-confuse.pF, I mean and you understand well...
4  Using Arduino / General Electronics / Re: standalone arduino on: September 15, 2014, 03:22:09 am
Here's my breadboard.
All connections looks good in my eyes...

But, as I say in post before, I doubt about combination of crystal (16mhZ, 18Pf) / capacitors (22Pf).

5  Using Arduino / General Electronics / Re: standalone arduino on: September 15, 2014, 03:19:26 am
Is it wrong to set the 16MHz crystal (18pF) to ground with 22pF?

6  Using Arduino / General Electronics / standalone arduino on: September 12, 2014, 08:42:57 am
Hi,

I try to made this
http://arduino.cc/en/Main/Standalone

But at a first test the don't work.

Is the capacity of the crystal essential? I've a crystal of 18pF, and on a bought arduinoboard they will use a 22pF crystal.
Could that be the fault?

Gr.
Johan
7  Topics / Robotics / Re: Lego Mindstorms NXT on Arduino IDE on: April 07, 2014, 02:07:57 am
Thanks.
It looks like not very handy to do this.
I put my question at a dutch arduino forum too, with the same result.

I've used BricxCC to program NXT in C.
But at our school we use arduino as well. So it should be nice if we had one interface to program both devices.

Gr.
Johan
8  Topics / Robotics / Lego Mindstorms NXT on Arduino IDE on: April 04, 2014, 02:17:02 am
Hello,

Is it possible to programm the Lego Mindstorm (NXT) with the Arduino IDE?
I find (google) it is the same chip as the Arduino Due.

Gr.
Johan
9  Community / Exhibition / Gallery / Re: String numeric output with V-USB HID on: March 20, 2014, 02:26:48 am
Oke, this is an delay-function.
But I want to write the time in excel since beginning of the program.
So we can draw such as a time-temperature chart.

Or I don't understand it well?

Thanks for hint, but the installation of a driver is just what we don't want.

J.

10  Community / Exhibition / Gallery / Re: String numeric output with V-USB HID on: March 19, 2014, 07:39:45 am
Another question:

How is it possible to use the millis() function, because of timer0 is disabled?
Is millis() switchable at different timers?

Johan
11  Community / Exhibition / Gallery / Re: String numeric output with V-USB HID on: February 03, 2014, 05:15:18 am
Works!
The circuit was wrong.
In the usb-connector I used, the sequence of D+, D- etc. was different of the circuit at hackster.io.
I expected that the sequence at the picture was the same of at a real usb-connector. But it was not... :-(

I'm happy to play with it.
Thanks for supporting me.

Gr.
Johan
12  Community / Exhibition / Gallery / Re: String numeric output with V-USB HID on: January 27, 2014, 08:36:23 am
I build the circuit over-and-over, but Zener U$S2 (connected with r2/3) becomes very hot and windows still said that he couldn't find the right drivers for this device.

I bought the 1N5227B. In your article you speak about the 1N5227B-TAP. See comparision:

http://nl.farnell.com/jsp/search/productcompare.jsp?N=0&Ntk=gensearch&Ntt=1N5227B&Ntx=mode+matchallpartial&exposeLevel2Refinement=true&suggestions=false&ref=globalsearch&_requestid=99111


Whats the difference between them?

J.
13  Community / Exhibition / Gallery / Re: String numeric output with V-USB HID on: January 23, 2014, 03:25:43 am
Thanks Ray,
I will check my circuit first.
The components comes from Farnell. As far as I know the same kind of shop than Newark. (element 14).

But I set it up right?
-UNO connect to pc - upload sketch - UNO disconnect - connect usb-circuit - open excel?
Otherwise you have two usb-ports in use. So to who should Excel listen?

I will keep you informed.

Gr.
Johan

14  Community / Exhibition / Gallery / Re: String numeric output with V-USB HID on: January 22, 2014, 03:34:07 am
Hi Ray,

Thanks for answering me on Hackster.io.

I'm a little basic in Arduino code so not all things are clear to me.

What have I done:
-I build the circuit as shown on hackster and other sites with connections at D2, D4, D5, Vcc and Gnd.
-I connect a pot to analog A0
-I uploaded the sketch to my arduino UNO.
-I disconnected my UNO from pc, and give it external Vcc.
-I connected the circuit with the USB connector
-And looks in Excel, and wait, and wait, but nothing happens...

When I connect the selfmade usb connector, my pc gives the message that there are no drivers found for this device. Also the sound you hear by connecting gives three low beeps.

If the steps as shown above are right, I have to check my circuit.

Also I have this questions:
- We will try to use this for measurement up to 2 analog ports. Nothing else. Can I delete all unnecessarry code, p.e. all keystrokes?
- What do you think about the velocity of this realtime connection? Measuring 50Hz lightflashing, or a 440Hz sound?

Thanks for help so far.
I hope it is useful to us. The PLX-DAQ macro for Excel is realy good too, but the disadvantage is that you have first to install the macro on your system before you can work with it.

Gr.
Johan
15  Using Arduino / Programming Questions / Re: statechangedetection and debounce on: December 21, 2013, 06:45:18 am
Thanks for last two replies.
I saw a hardware solution (capacitor) was possible too.
Thats a great idea, i think.

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