AVR-Chat

I have an at90USBkey I've been experimenting with, and it's incredibly 
flexible.
But, getting the software environment and samples working can be a 
challenge.

There are also the 1-wire / I-button solutions.

1-wire is nice if you want to design and build your own solution.
The I-buttons are pre-engineered and packaged solutions.
This Humidity/Temp data logger might be a good place to start: 
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/4379

General pages:
http://www.maxim-ic.com/products/1-wire/

http://www.maxim-ic.com/products/ibutton/


drgert1 wrote:
>
> Hi All,
>
> I just joined the group.
>
> My background is from amateur astronomy. Stuff like this:
> http://www.trivalleystargazers.org/gert/mercury_transit2006/image_04.jpg 
> <http://www.trivalleystargazers.org/gert/mercury_transit2006/image_04.jpg>
>
> I control most of my telescope stuff and imaging equipment from the
> laptop via USB & serial.
>
> When I'm mobile I use batteries to power the equipment.
>
> Now what has that todo with AVR? I am looking for some data gathering
> via USB. I am interested in voltage measurements to monitor my
> batteries and weather data. (Temperature and dewpoint would be nice)
> There's a nice sensor for this:
>
> http://www.sensirion.com/en/01_humidity_sensors/06_humidity_sensor_sht75.htm 
> <http://www.sensirion.com/en/01_humidity_sensors/06_humidity_sensor_sht75.htm>
>
> All I need is a USB based little blob with an MCU inside to get the
> data from sensor or via ADC and send it to the PC. A little program on
> the PC would display the data. There are AVR devices that have pretty
> good spec like built in USB and ADC. (like ATmega16U4, AT90USB162 etc)
>
> There is this eval board:
>
> http://www.digikey.com/scripts/us/dksus.dll?Detail?name=AT90USBKEY-ND 
> <http://www.digikey.com/scripts/us/dksus.dll?Detail?name=AT90USBKEY-ND>
>
> But I think it's too big and clumsy. With USB integrated into the mcu
> the whole thing should almost fit into the USB plug. Just have the
> wires to the battery sticking out. (This boad is my fallback position
> however if nothing else materializes)
>
> I am looking for something the size of a USB flash stick. Preferably
> ready made as an eval system for the MCU. Attaching the sensor and
> input for voltage measurements should be easy. I would not like to
> make my own pcb.
>
> Any ideas are appreciated.
>
> Thanks,
> Gert
>
>  



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