AVR-Chat

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

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

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

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