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1  Using Arduino / Networking, Protocols, and Devices / Re: Low res high fps Camera/line Scanner on: July 17, 2013, 09:04:19 am
I'll think about the AS5040 then. But I still think my previous ideas would make for a nice Projekt smiley-grin
So if one knows about a nice optical IC, let me know!
2  Using Arduino / Networking, Protocols, and Devices / Re: Low res high fps Camera/line Scanner on: July 17, 2013, 07:45:05 am
@pylon Why must it always come down to why, when it should all be coming down to how?  smiley Let just say scalability for now. About the size....well just not 12 photo diodes in a row big ^^
@Grumpy_Mike 10bits are nice, but i don't like the whole hall effect idea. As far is i know they can be distracted by other magnetic sources e.g. a motor. If that is no longer the case please tell me and i'll give it another thought.



3  Using Arduino / Networking, Protocols, and Devices / Re: Low res high fps Camera/line Scanner on: July 16, 2013, 11:56:55 pm
Quote
Hmmh, a camera is a light sensor too, excuse me, a lot of light sensors.
I know that. But as far as i know all analog light sensors come i a huge package size. For a e.g. 12 bit precision the encoder would get huge.
All i could think of in terms of many sensors and small size was a camera/line scanner.
Of cause if there is a small ic with a photo diode array let me know. Those would be better because you could use interrupts to trigger the measurement.

With a camera you would be getting motion blur...

It's more of an academic question and my aim is to get the rotary encoder as small as possible.
4  Using Arduino / Networking, Protocols, and Devices / Low res high fps Camera/line Scanner on: July 13, 2013, 12:51:09 am
Hi,
i would like to build an absolute rotary encoder. But I don't like the cheap once with light sensors.
The other day i saw a guy who hacked a mouse camera with an arduino.
I think it would work great to pick up Graycode of a rotary disc.  But the guy only got 10fps(due to the camera) which isn't fast enough for me.
What also might work is a tiny line scanner with high fps.

Are there any cheap high frames per second, low resolution Cameras/line scanner that an arduino can still handle to process? (as many fps as possible...30 fps ain't enough either!)

I know video can quickly get out of the league of an arduino...but maybe this could still work because of the low res (just e few pixels to get like 12bit Gray code).

regards,
Halo
5  Using Arduino / Networking, Protocols, and Devices / Re: power supply for 5100b shield on: February 01, 2013, 09:15:19 am
They (Tutorial) say:
Quote
Ignore this at your own risk. When connecting this supply DO NOT use the DC socket on the Arduino. Instead, connect the 5V (positive) from the supply to the 5V pin on the GSM shield, and the negative to the GND pin.
I think the arduino guys wouldn't write not to risk it if there weren't a possibility of damaging your Arduino.
So either you just go with the tutorial (It worked for them) or to make sure look at the respective Arduino schematic and look why it might not go wrong with your Setup (I can't help you with that).

Someone else please pitch in to help redruff.
6  Using Arduino / Networking, Protocols, and Devices / Re: power supply for 5100b shield on: January 31, 2013, 06:08:17 pm
I think it depends on which Arduino you are using.
Look for "Power" at the respective Webpage....like:
For the Uno Rev3 http://arduino.cc/en/Main/arduinoBoardUno it says:
Quote
5V.This pin outputs a regulated 5V from the regulator on the board. The board can be supplied with power either from the DC power jack (7 - 12V), the USB connector (5V), or the VIN pin of the board (7-12V). Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. We don't advise it.
So NO.
For the Nano http://arduino.cc/en/Main/ArduinoBoardNano it say:
Quote
The Arduino Nano can be powered via the Mini-B USB connection, 6-20V unregulated external power supply (pin 30), or 5V regulated external power supply (pin 27). The power source is automatically selected to the highest voltage source.
So YES.
7  Using Arduino / Networking, Protocols, and Devices / Re: MAG3110 magnetometer I2C problem on: January 31, 2013, 02:10:00 pm
Do u have Pull-Ups on SCL and SDA (from 100k  to 1k Ohm)?

If you are not sure if the Address you use is right use http://todbot.com/blog/2009/11/29/i2cscanner-pde-arduino-as-i2c-bus-scanner/comment-page-1/ to look for is.

If you think the code isn't working as it should throw some Serial.println s in.
8  Using Arduino / Networking, Protocols, and Devices / Re: I need to example for arduino uno+ enc28j60+XAMPP on: January 31, 2013, 01:54:41 pm
I think what you are looking for is http://blog.thiseldo.co.uk/?p=504 for the enc28j60 and http://winkleink.blogspot.co.uk/2012/08/arduino-ethernet-ethercard-xamp-web.html for the XAMPP.
Start watching some English TV Shows with English subtitles. Those helped me a lot (I'm from germany). Then you could write better Forum or Google-Search requests smiley-grin.
9  Using Arduino / Networking, Protocols, and Devices / Re: Arduino->Processing wireless Serial CRC/ACK on: January 31, 2013, 01:34:34 pm
This might not what you are looking for (break a butterfly on a wheel) but when i hear
retransmit mechanisms
I almost directly think about a nice TCP Protocol (had to Programm some Server an Client Applications  smiley-grin, only not for Arduino). I know in the Arduino Wi-Fi Shield they use TCP. le Link to the Library:
https://github.com/arduino/wifishield/tree/master/libraries/WiFi/utility
socket, server_drv and spi_drv could be of interest for you to implement TCP. In the parent folders you should find examples on how to send and receive data using TCP. I think you would almost only have to change the spi_drv funktions to insteed talk to your XRF modul.
10  Using Arduino / Networking, Protocols, and Devices / Re: help for processing ( sending data to xbee connected to PC ) on: January 31, 2013, 12:46:06 pm
Hi,
I don't have an Xbee but I think what u are looking for is SoftwareSerial http://arduino.cc/en/Reference/SoftwareSerial.
And with Processing I think u mean http://processing.org/.  Here is a nice Tutorial to start with: https://www.youtube.com/watch?v=g0pSfyXOXj8
11  Using Arduino / Networking, Protocols, and Devices / WLAN,Wi-Fi on a microcontroller/microprocessor level on: January 31, 2013, 12:20:59 pm
Hi,
(Hope this is the right Forum for this. Love this huge community!)

I'm a hobbyist with a lot of persistence . A few month back i was interested in Video Streaming over WLAN and a few days back (I also do small Arduino Projects) I stumbled over the Arduino Wi-Fi Shield.
While i don't thing a Aduino is able to stream a digital Video(480p,720p,1080p) in Real-time, it caught my eye.
My main point of interest in WLAN was getting a above average connectivity and range in the ISM Band (mainly 2.4& 5.8Ghz) not using any Output Power Amplification.
Putting Antennas aside I think what's left to tinker about with is the Modulation and the Channels (switching them [DSSS,FHSS etc.]).
With those specs the cheapest way to get started with WLAN is probably with Wi-Fi (802.11b/g or better jet 802.11n).
So i looked in the datasheet of the HDG104 used with the Arduino Wi-Fi Shield and found:
Modulation: QPSK, 16QAM, 64QAM DBPSK, DQPSK, CCK, OFDM with BPSK
And i thought awesome!!, let's have a look at the Library.
Idk if i checked everything but i couldn't find any code about setting the modulation or the channels. That's probably because in a normal use the Wi-Fi chip does those thing on its own. But there should be a possibility to set them manually.
So I was looking for the registers to use with the chip but in the Library I only found a in my view rather small enum in the wifi_spi.h and literally nothing in the datasheet.
The fact that there is nothing in the datasheet leads me to the assumption that the registers must be highly standardized which would make sense.
But because there are "so many" standards and the chips have to be backwards compatible it is all the more confusing to me.
To me it feels like "they" don't want you to get started. ^^
What i found after that were Broadcom Chipset specs which showed some registers (but not well documented) and some of those nice ~3000 pages IEEE-SA papers with which I'm not done skimming through.  smiley-grin

What is the best way to get started with Wi-Fi on a microcontroller/microprocessor level?
- Equipment (which Hardware?) [I got a Port207V Cortex-M3 STM32F207VCT6 Development Board (Could that aid me in any way? -Probably still to wimpy-)]
- Knowledge (what do i have to read up on and where do i get useful information, especially for the modulation and channel part?)
   
I would google it all by myself but it seems like I'm not good at thinking up keywords to look for anymore.   
What's left to say is that any sort of related hint is appreciated! Even just a keyword I might not have used jet would be nice!

regards
Halo
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