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1831  Using Arduino / Project Guidance / Re: INterfacing Arduino with a USB output on: April 09, 2013, 11:33:08 am
You might be successful using the USB Host Shield https://www.sparkfun.com/products/9628. What has the Arduino to do with the data it receives from the mouse?
1832  Using Arduino / Project Guidance / Re: How to OCR digits real time and use that value in Arduino? on: April 09, 2013, 11:30:00 am
Yes, this is possible but has then nothing to do with the Arduino. As long as you're able to do the OCR somehow on the PC you can send that value to the Arduino by USB (or TCP/IP if you have an Ethernet Shield).
1833  Using Arduino / Project Guidance / Re: Printing with an Epson M150-II Micro Dot Matrix Printer on: April 09, 2013, 11:27:06 am
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Does it seem feasible to drive this printer mechanism from an arduino uno?

Yes, it does. The UNO is fast enough to drive the pins in a high enough frequency and need about 6 GPIOs while the UNO has 20 of them.
In the project I would spend one Arduino to drive the printer only (no other tasks) because else you might get difficulties staying within the timing limits (depends a lot on what else you thought the Arduino might have to do).
1834  Using Arduino / Project Guidance / Re: GSM Shield and SimCard Requirement on: April 09, 2013, 11:13:04 am
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Here is my specific question. what if I am the owner of the network and I make it open to everyone do I still need a simcard?

Yes, you need one (the SIM contains the phone identification, in the case of the GSM shield the Arduino is the phone) but it can be any SIM because you can configure which IMSI (that's the identification number in the SIM) you want to give access to your network.

Just out of curiosity: Where in the world are you living that you're allowed to make your own GSM network?
1835  Using Arduino / Project Guidance / Re: RFID project on: April 09, 2013, 11:00:57 am
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Wich components should I use best?

We have no chance to give you a good suggestion with so little data of your project. You don't tell us what you want to do with that project and you write nothing about limitations (technical, financial) you have.

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Is it possible to add a rfid and a wifi shield together?

It's possible but depends on what hardware you'll be using.
1836  Using Arduino / Project Guidance / Re: How to OCR digits real time and use that value in Arduino? on: April 09, 2013, 10:54:03 am
An Arduino is much too slow to do any OCR, it even won't process the image data stream of webcam.

Use a more powerful platform for this (e.g. Raspberry Pi, Cubieboard, etc.).
1837  Using Arduino / Sensors / Re: IDG500 Breakout Board Sensor - How Do I Find a Header? on: April 09, 2013, 10:08:32 am
Use one of these and cut it to the right width https://www.sparkfun.com/products/115.

Edit: Or these if you want to have the male variant: https://www.sparkfun.com/products/116.
1838  Using Arduino / Sensors / Re: Fast 16bit ADC using Arduino Due and AD977 on: April 09, 2013, 10:05:08 am
The relevant line is probably this one:

Code:
  int volts=((4980470*response1)/255)+((19530*response2)/255);

Hint: call variables so that the content is best described. If it contains microvolts, don't call it volts.

Then use the correct shifting:

Code:
  int microvolts = (((uint32_t) response1) << 8 | response2) * 76;

First we create a 16bit value from the two bytes, resulting in a value in the range 0 - 65535. The upper limit multiplied by 76 gives 4980660, which should be sufficiently accurate for your usage.
1839  Using Arduino / Networking, Protocols, and Devices / Re: Can the Uno handle two serial port functions ? on: April 09, 2013, 08:07:11 am
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Does anyone know if the Uno or the Leonardo can be used as a Serial to USB adapter?

The Leonardo can be used as this, the UNO includes an ATmega16U2 for this purpose, so theoretically it can be used too. But I guess you question is too general to be of value for your purpose.
1840  International / Deutsch / Re: Höhe messen (über Barometer ?) on: April 09, 2013, 07:45:56 am
Da keine weiteren Einschränkungen vorhanden sind, spielt der Preis keine Rolle. Dieser Sensor dürfte Deine Vorgaben erfüllen, wenn Du das Gehäuse weg lässt, bist Du wahrscheinlich auch unter 100g:

http://www.micro-epsilon.de/displacement-position-sensors/laser-distance-sensor/optoNCDT_ILR_1021_1101_1151/index.html

Wie Du allerdings bei einem Heli aus einer Distanzmessung die Höhe ableiten willst, hast Du noch nicht definiert. Ein installierter Sensor zeigt ja nicht immer schön nach unten und die Dinger können ja auch rücklings fliegen.
1841  International / Deutsch / Re: Höhe messen (über Barometer ?) on: April 09, 2013, 07:26:11 am
Kannst oder willst Du uns nicht mehr mitteilen?

Tönt nach eine Fluggerät. Ist es auch eines? Wenn ja, welche Art (gleitend? Multikopter? Wurfgeschoss?) Oder eine Art Lift/Aufzug? Wie sieht es mit der Stromversorgung aus? Wieviel darf das Gerät verbrauchen (Strom)? Gibt es weitere Einschränkungen?
1842  International / Deutsch / Re: Vorstellung und Frage on: April 09, 2013, 07:21:20 am
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In der Regel laufen die Drehgeber endlos durch.

Das stimmt zwar, aber für die Servos gilt das nicht in jedem Fall. Wenn Du die Dinger schon hast, wäre vielleicht ein Link auf die Produktseite ganz sinnvoll.

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also kann ich immer 2 Servos an einen Pin legen, oder hab ich dich falsch verstanden?

Ja, grundsätzlich sollte das funktionieren. Wie weit das sinnvoll ist, hängt stark von Deiner Konstruktion ab.
1843  International / Deutsch / Re: Höhe messen (über Barometer ?) on: April 09, 2013, 07:17:46 am
Hast Du etwas mehr Angaben? Ist das indoor oder im Freien? Hast Du eine genaue Ausrichtung? Gibt es Gewichtsbeschränkungen?
Ein Laser-Distanz-Messgerät kriegst Du im Baumarkt und das ist genauer als 10cm.
1844  International / Deutsch / Re: Displaynutzung mit Lilypad? on: April 09, 2013, 06:36:21 am
SparkFun hat auch ein E-Ink-Display im Angebot. http://www.play-zone.ch/de/sparkfun-e-paper-10x2-character-display.html

Sieht etwas flexibler aus, das starre Breakout für den Anschluss (http://www.play-zone.ch/de/sparkfun-e-paper-breakout-board.html) ist deutlich kleiner als ein Shield.

Aber eine Lösung speziell für Lilypad kenne ich nicht.
1845  Using Arduino / Project Guidance / Re: Help with Ethernet shield world wide IP on: April 09, 2013, 04:22:48 am
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Once ip port to cisco router,then game start. BGP (Border Gateway Protocol) as name is router/gateway protocol is not much to do with device behind router such as  server/work station/arduino...

You're writing about stuff you don't understand. With BGP you announce IP networks not single IPs, the Internet routing table is big enough without silly thing like you are suggesting here. BGP is used by Internet Service Providers and bigger companies (if they have multiple inter-network connections) to make their internet connection more fail safe. I'm quite sure you won't get an AS number (this is necessary to take part in the worldwide BGP community) just to make your Arduino "portable".
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