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RichQ
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Re: Tricopter
RichQ   7/1/2013 1:27:23 PM
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Test equipment is good, but what do you do with the magnetic compass and accelerometer?

Michael Dunn
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Re: Tricopter
Michael Dunn   7/1/2013 11:26:33 AM
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I think what I'd like to work on with this board is some sort of multipurpose test equipment gizmo – a combination scope, generator, curve-tracer, component tester, DMM, etc.

Though I'll probably hook up a display and try coding a Game of Life first :-)

Michael Dunn
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Re: Tricopter
Michael Dunn   7/1/2013 11:04:57 AM
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I have a "copter" of some description, except the whole thing spins. There's the central little body, two wings (at 12:00 and 6:00 say), and two arms with small props (3:00 & 9:00), which thrust horizontally, not vertically. Hovering is...a challenge.

RichQ
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Tricopter
RichQ   7/1/2013 10:56:08 AM
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My first thought when I got one of those boards was to build a quadcopter, but then I decided that was too conventional, so I elected to build a tricopter. The three motor setup makes yaw control a challenge, as it is coupled with the other degrees of freedom, but that was to be part of the fun. Not gotten very far along, I'm sad to say.

Michael Dunn
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Programming
Michael Dunn   7/1/2013 10:23:26 AM
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Another nice thing about this board is the built-in USB programming/debug interface – no pod required. It's implemented by a second ARM MCU, a Cortex-M3!

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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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