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This thread is privately moderated by Jack Crossfire, who may elect to delete unwanted replies.
Dec 27, 2012, 06:39 AM
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Why Rovio makes $42 million on a ball that does nothing

This has lot of problems, which is why Rovio gets a $42 million investment on a ball that does nothing while a rover that tries to stream video gets nothing. The mane problem seems to be the high current used by the Rover 5 motors. They take 1A, causing serious interference. Despite being UDP, someone is buffering when the connection is lost, causing driving commands to get delayed or stuck.

This rover looks dead, unless another communications method can be devised, the buffering can be disabled, or the interference can be traced to a fixable source, like voltage ripple in the 3.3V line. At least some autonomy might need to be done onboard instead of over wireless.

Also should note conventional wood glue takes 2 days to set, in a 65F apartment. After waiting 1 day for the 1st stage of wood parts to set, gave up & hot glued it together.
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Dec 27, 2012, 07:19 AM
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ltc's Avatar
Control the loop area of the motor current, pay careful attention to the return impedances/path, provide sufficient local bypassing for motor transient current and control edge rates ... always the first steps to fixing issues such as this.

And I have no idea who Rovio is....
Jul 06, 2013, 08:05 PM
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Wowwee Rovio?

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