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Plane Locator Beeper #2: Here is another device
to help you locate your downed R/C sailplane in the
bushes and weeds. Similar to the other design, this
circuit plugs into a spare servo socket on your
receiver, and it is a pulse omission detector. The
alarm sounds when pulses originating from your
transmitter are no longer being received--turn off
your transmitter to turn on the alarm and help you
find your plane. This circuit is simpler than the
other design, is much easier to build, but is not
quite as specific. While the other design tests for
a specific frequency of pulses, this design is less
picky, and may not work quite as well in areas with
more radio frequency background noise. |
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Precision Digital Altimeter: The current
concept incorporates a wireless transmitter and
receiver and is thought to be used for remote
controlled airplanes or appliances with two separate
parts. In other words, we have one dedicated
transmitter (acquisition, filtering) and one
dedicated receiver part (user-interface, look-up
table, calibration, storage), capable of being
connected together with any physical layer, e.g.
wired, wireless, infrared. If you want to build a
standalone altimeter/variometer just for hiking or
mountaineering, this setup can obviously be
simplified by omitting the wireless components.. |
