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Mar 23, 2009, 12:32 PM
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sonar flight #2


Firstly, flying the IDG300's is real hard. They drift too much for any lapse of concentration. Secondly, the software sonar was much better in flight than the Maxbotix reference design. Got 20ft of horizontal range at eye level. They can go up to 30ft at higher altitudes. This is more than the indoor space in the dumpy apartment.

Though the margin can be increased by aiming the receiver at the flight area, we aimed it straight up & the transmitter straight down.

Also, FYI the 3.3Ah super battery went 10min with Ghetto copter.

Finally, the hand soldered uBlox 4 recorded horizontal position in flight but not vertical, so we can't tell if some of the Maxbotix range was vertical or horizontal. It got 5-8 satellites.

With the soldering producing much better results than the breadboard, there R still a few more amplifier tweeks & an increase in the bandwidth before we light up the 2 extra transducers.
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