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Re: 7-segment data transmission

 by waltr ¦  Mon Nov 17, 2014 7:50 am ¦  Forum: SparkFun Product Questions ¦  Topic: 7-segment data transmission ¦  Replies: 7 ¦  Views: 569

What you really need to do is put an O'scope probe on the data line. Then you can 'see' the Voltage levels and the data timing.

Re: Outdoor time-lapse camera

 by waltr ¦  Mon Nov 10, 2014 1:37 pm ¦  Forum: Projects ¦  Topic: Outdoor time-lapse camera ¦  Replies: 1 ¦  Views: 300

GoPro and case
http://shop.gopro.com/cameras?gclid=CIL ... 7AodsHYAIg
Mobius and case
https://www.mobius-actioncam.com/

Both are good off the shelf solutions.

Re: Pro Micro 5v 16mhz won't load program

 by waltr ¦  Thu Oct 30, 2014 7:13 am ¦  Forum: SparkFun Product Questions ¦  Topic: Pro Micro 5v 16mhz won't load program ¦  Replies: 4 ¦  Views: 521

OK. Yea, I have done the same thing getting something working in windows. It finally works but don't remember how I got there or what made it work.
But all is well now so that's the good thing.

Re: Pro Micro 5v 16mhz won't load program

 by waltr ¦  Wed Oct 29, 2014 7:40 am ¦  Forum: SparkFun Product Questions ¦  Topic: Pro Micro 5v 16mhz won't load program ¦  Replies: 4 ¦  Views: 521

Does it have the Bootloader installed?
If not you must first flash the bootloader.

Do you have the proper USB drivers installed?

Re: xbee's to make wired usb webcam into wireless??

 by waltr ¦  Wed Oct 29, 2014 7:38 am ¦  Forum: SparkFun Product Questions ¦  Topic: xbee's to make wired usb webcam into wireless?? ¦  Replies: 9 ¦  Views: 745

Though i haven't read any reviews about this security cam, I would say that if your not trying to send 1080p with 23 million colors, why not try it? You may learn something.. I did order a mini cam and receiver to experiment with. Under the best conditions, they are limited to NTSC, 525 interlaced,...

Re: xbee's to make wired usb webcam into wireless??

 by waltr ¦  Tue Oct 28, 2014 7:23 am ¦  Forum: SparkFun Product Questions ¦  Topic: xbee's to make wired usb webcam into wireless?? ¦  Replies: 9 ¦  Views: 745

jkoeh wrote:BTW, will the R-Pi running linux play nice with a Windows PC via WiFi?
Yes, I have several Windows PCs (XP, vista, win8.1), a Linux Ubuntu PC and an R-Pi all on my WiFi network. Works fine.

Re: xbee's to make wired usb webcam into wireless??

 by waltr ¦  Mon Oct 27, 2014 9:24 am ¦  Forum: SparkFun Product Questions ¦  Topic: xbee's to make wired usb webcam into wireless?? ¦  Replies: 9 ¦  Views: 745

No. XBees have low data bandwidth and can not be a USB Host.

Maybe a better way is use an R-Pi for each camera and connect through WiFi.

Re: Two TSL2561 / One Arduino Uno

 by waltr ¦  Wed Oct 22, 2014 7:12 am ¦  Forum: SparkFun Product Questions ¦  Topic: Two TSL2561 / One Arduino Uno ¦  Replies: 2 ¦  Views: 345

Do the two sensors have different I2C Addresses? If not then you can not parallel them.
If they do have different addresses then you read one sensor then the other.

Re: minimalist Xbee config?

 by waltr ¦  Sun Oct 19, 2014 3:44 pm ¦  Forum: Projects ¦  Topic: minimalist Xbee config? ¦  Replies: 4 ¦  Views: 516

For short range Adafruit sells Key Fob TX/RX pairs.

Re: Bluetooth to I2C bridge

 by waltr ¦  Tue Oct 14, 2014 6:34 am ¦  Forum: Wireless/RF ¦  Topic: Bluetooth to I2C bridge ¦  Replies: 4 ¦  Views: 1985

Yep, Ardiuno board then program to do the translation from async serial to I2C.

I seem to recall that FTDI has a chip for USB to I2C but not aware of any off the shelf solution.

Re: Bluetooth to I2C bridge

 by waltr ¦  Mon Oct 13, 2014 6:42 am ¦  Forum: Wireless/RF ¦  Topic: Bluetooth to I2C bridge ¦  Replies: 4 ¦  Views: 1985

Arduino

Re: Wireless temp monitoring

 by waltr ¦  Wed Oct 08, 2014 7:00 am ¦  Forum: Wireless/RF ¦  Topic: Wireless temp monitoring ¦  Replies: 6 ¦  Views: 903

I'll suggest getting one of the Arduno boards then start learning how to program it. Start with learning how to blink an LED. You will need to use its Analog input and the ADC to digitize the temperature sensor, if the one you use outputs an analog Voltage. Or learn how to do I2C or SPI if the tempe...

Re: Wireless temp monitoring

 by waltr ¦  Tue Oct 07, 2014 11:13 am ¦  Forum: Wireless/RF ¦  Topic: Wireless temp monitoring ¦  Replies: 6 ¦  Views: 903

Yes it could be done with cheap 433MHz tx/rx but these will require a processor on each TX to encode the data for reliable transmission. These cheap TX/RX use OOK modulation which needs at least Manchester encoding. Not hard to do since many people have done this and there are plenty of examples on ...

Re: Wireless temp monitoring

 by waltr ¦  Mon Oct 06, 2014 10:20 am ¦  Forum: Wireless/RF ¦  Topic: Wireless temp monitoring ¦  Replies: 6 ¦  Views: 903

Not the cheapest but the easiest is to use XBEE series 1 modules and an Arduino at the "Reciever" end to get the data from each node and run the display LEDs.
1Hz update rate and 35 meters is quite reasonable for this setup.

Re: Datalogging 9dof accelerometers over distances of >10m

 by waltr ¦  Mon Sep 29, 2014 8:40 am ¦  Forum: Projects ¦  Topic: Datalogging 9dof accelerometers over distances of >10m ¦  Replies: 5 ¦  Views: 563

Correct, I2C is not designed for long distances but for on a single PCB. The I2C buss can go further but reliability can be an issue. If all your I2C sensors are close together than the easiest/cheapest solution is to use an Arduino (any variety) to read the sensors with I2C then transmit the data o...

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