Cascaded Amplifier Design Interfacing a Tuned Antenna Circuit to an Audio Speaker

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The UNH Eagle EyeDesign and Development of a
Balloon Based Remote Controlled Camera over
Kingsburyhttp//svpal1.unh.edu/skycam/Richard
L. Lynch - Electrical and Computer Engineering
Junior/Summer Undergraduate Research Fellowship
(SURF) Recipient under Dr. Richard A. Messner -
Faculty Sponsor/Coordinator, Synthetic Vision and
Pattern Analysis Laboratory
Functional Diagram
Abstract Internet web cams have become popular
these days, broadcasting live images of
everything from mountain tops to soda machines.
However, despite their common use, web cams have
not evolved much (aside from becoming smaller and
cheaper). Todays web cam has the same
functionality as the earliest web cams, theyre
still fixed cameras sitting somewhere that
periodically capture an image and send it to the
users. The Eagle Eye is an attempt to break
from this trend and develop a more exciting and
innovative web cam. Three features set the Eagle
Eye apart from the common web cam. First, using
the web interface, users have the ability to
reorient the Eagle Eye by either clicking on the
up/down/left/right buttons, or by clicking on a
map of campus and specifying which building the
camera should look at. Digital zooming is also
available to users wishing to look at a distant
structure. The second innovative feature of the
Eagle Eye is that it is mounted on a weather
balloon, tethered 150 feet above Kingsbury. This
provide users a very unique view of campus.
Finally, the Eagle Eye was designed to be
completely wireless. The Eagle Eye fully met
all of its design objectives, with the exception
of the wireless objective. The video from the
camera is transmitted via wireless, but control
signals to the on-board HC11 microcontroller are
currently transmitted via DTMF tones over UTP
cable. There was insufficient time remaining to
acquire/integrate a FM transmitter/receiver to
the system, and make the entire system
wireless. Design Considerations - Low power
consumption - 360 degrees of freedom along both
axes - Resistance to the elements - Wireless
transmission of control and image signals - Low
cost Many thanks to - Dr. Richard A.
Messner - Adam Perkins - Bob Champlin - The
Undergraduate Research Opportunities Program
(UROP)
Pictures
Above and left the camera mounted on the
platform. Above and right the entire camera and
circuit board assembly mounted inside the PVC
enclosure.
Schematic