Breaking News
Comments
Oldest First | Newest First | Threaded View
Page 1 / 2   >   >>
EdwinP0
User Rank
Rookie
IR Drop
EdwinP0   9/19/2013 12:40:46 PM
NO RATINGS
It seems there is some time before the quadcopter decides it is dead.  Can you control the power supply to raise the voltage as a function of the current (and resistence) so that the voltage at the quadcopter is constant (e.g. not at the power supply).

 

Randa11
User Rank
Rookie
Re: IR Drop
Randa11   9/19/2013 3:54:41 PM
NO RATINGS
Get a bench power supply with sense leads.

You know how bench supplies always have two positive terminals and two negative terminals, and they're always coupled with big (E on its side shaped) shorting links. Well if you remove the shorts, then, run your two thick wires out to the load and two thin wires back to the sense inputs, the power supply will automatically compensate for the voltage drop in the thicker wires.

ShawnHymel
User Rank
Rookie
Re: IR Drop
ShawnHymel   9/19/2013 8:29:12 PM
NO RATINGS
We actually discussed having a supply change its voltage to accommodate the large drop depending on the current. While it should work, Tara and Sean had limited time during their hacker-in-residence stay.

Robotics Developer
User Rank
Rookie
Re: IR Drop
Robotics Developer   9/19/2013 9:33:25 PM
NO RATINGS
Another option would have been to supply a higher than needed voltage and provide on board voltage regulation.  This would avoid the 4 wire remote sensing and still enable full votage/current at the copter.

HeyJoe0
User Rank
Rookie
Re: IR Drop
HeyJoe0   9/19/2013 11:01:46 PM
NO RATINGS
I agree with running a local regulator and feeding higher voltage. You could also run much thinner wire and the flight dynamics will respond closer to the final untethered version. 

Caleb Kraft
User Rank
Blogger
Re: IR Drop
Caleb Kraft   9/20/2013 8:47:17 AM
NO RATINGS
yeah, one week is hardly enough time to recognize the issue and come up with a prototype, much less refine it.

Caleb Kraft
User Rank
Blogger
Re: IR Drop
Caleb Kraft   9/20/2013 8:49:56 AM
NO RATINGS
that's a pretty good idea!

Caleb Kraft
User Rank
Blogger
Re: IR Drop
Caleb Kraft   9/20/2013 8:50:45 AM
NO RATINGS
that's a pretty good idea!

Robotics Developer
User Rank
Rookie
Re: IR Drop
Robotics Developer   9/20/2013 8:37:32 PM
NO RATINGS
I would say that a week is not enough time to do much and they at least got something accomplished.  If I were to revisit that effort I would have suggested building a larger quad-copter with greater lift and larger battery options.  The tether is a great starter for debug but not a real long term solution, the full benefits of a copter can only be realized un-tethered.

Robotics Developer
User Rank
Rookie
Re: IR Drop
Robotics Developer   9/20/2013 8:38:18 PM
NO RATINGS
I would say that a week is not enough time to do much and they at least got something accomplished.  If I were to revisit that effort I would have suggested building a larger quad-copter with greater lift and larger battery options.  The tether is a great starter for debug but not a real long term solution, the full benefits of a copter can only be realized un-tethered.

Page 1 / 2   >   >>


Most Recent Comments
gleopold
 
Matthieu Wipliez
 
hb11us
 
Bert22306
 
junko.yoshida
 
junko.yoshida
 
betajet
 
Some Guy
 
Some Guy
Flash Poll
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Rishabh N. Mahajani, High School Senior and Future Engineer

Future Engineers: Don’t 'Trip Up' on Your College Road Trip
Rishabh N. Mahajani, High School Senior and Future Engineer
Post a comment
A future engineer shares his impressions of a recent tour of top schools and offers advice on making the most of the time-honored tradition of the college road trip.

Max Maxfield

Juggling a Cornucopia of Projects
Max Maxfield
2 comments
I feel like I'm juggling a lot of hobby projects at the moment. The problem is that I can't juggle. Actually, that's not strictly true -- I can juggle ten fine china dinner plates, but ...

Larry Desjardin

Engineers Should Study Finance: 5 Reasons Why
Larry Desjardin
28 comments
I'm a big proponent of engineers learning financial basics. Why? Because engineers are making decisions all the time, in multiple ways. Having a good financial understanding guides these ...

Karen Field

July Cartoon Caption Contest: Let's Talk Some Trash
Karen Field
127 comments
Steve Jobs allegedly got his start by dumpster diving with the Computer Club at Homestead High in the early 1970s.

Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)