Matt
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Matt's Discussions

Micro filament on Tethered UAV

Started this discussion. Last reply by Tommy Larsen Jan 23, 2018. 28 Replies

3DR Power Module Accuracy

Started this discussion. Last reply by Brenton Lohrisch Feb 27, 2013. 4 Replies

Circle mode failsafe error in code.

Started this discussion. Last reply by Matt Mar 2, 2013. 3 Replies

 

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Latest Activity

Tommy Larsen replied to Matt's discussion Micro filament on Tethered UAV
"MeToo !! :) "
Jan 23, 2018
GocGoc replied to Matt's discussion Micro filament on Tethered UAV
"Any updates on this project?   Would love some links to some cable?"
Jan 22, 2018
Pritam Ghanghas replied to Matt's discussion Micro filament on Tethered UAV
"I don't really have a schematic but I can draw one if you need. PM me."
Dec 17, 2016
Dennis Okeefe replied to Matt's discussion Micro filament on Tethered UAV
"do you have a drawing or schematic of your system?  we aren't trying to go commercial - we are looking into helping a search and rescue unit put up a "relay" craft for better communications in the mountains during searches.…"
Dec 17, 2016
Pritam Ghanghas replied to Matt's discussion Micro filament on Tethered UAV
"it actually works quite well. i had tested upto 60meters. But not with lambda. I decided against it. Local vendor was asking too much money for it. And the carrier board + lamda was coming out to be equal to most ac-dc power supplies available at…"
Dec 17, 2016
Dennis Okeefe replied to Matt's discussion Micro filament on Tethered UAV
"how did this work out...?   i am looking into a tethered drone concept for a search and rescue unit. dennis"
Dec 17, 2016
Pritam Ghanghas replied to Matt's discussion Micro filament on Tethered UAV
"Yes forgot to mention the heatsink. I guess in case of something in air I can use something less than recommended and save some precious grams. voltage drop can be handled. I can actually ramp up to 270V at ground station.  If I remember…"
Mar 24, 2015

Moderator
Dwgsparky replied to Matt's discussion Micro filament on Tethered UAV
"Why worry about the volt drop, the 3% I saw earlier does not matter in any way. the volt drop does not limit the distance. This is only relevant for a home or industrial installation  If you start at 240v from your supply and this drops to 220…"
Mar 23, 2015
Joe Dietrich replied to Matt's discussion Micro filament on Tethered UAV
"Don't forget, heat sink also.  I'm sure you could still come in under 4LBS. Watch you amp draw.  Usually Voltage Drop will become your enemy at rated ampacity over large distances."
Mar 23, 2015
Pritam Ghanghas replied to Matt's discussion Micro filament on Tethered UAV
"Well I am building one. Haven't faced much problem till now. By the way I am in the process of buying one tdk-lamda 16v but they say at that voltage in 500gm wattage is only 720W. Also these are not plug and play. They require a parent board…"
Mar 22, 2015
Matt replied to Matt's discussion Micro filament on Tethered UAV
"Nice find. I like the look of that product."
Mar 21, 2015
Jack Brisbin replied to Matt's discussion Micro filament on Tethered UAV
"It is better to step down the A/C first. When you use a D/C regulator the wasted energy is dissipated as heat. That much heat would induce thermal runaway on other components. "
Mar 14, 2015
Joe Dietrich replied to Matt's discussion Micro filament on Tethered UAV
"Actually, this idea is not so far fetched, both with (normal working) input voltage and a light weight AC-DC converter.  I came across this idea awhile back and looked at using this product (available in either 500W or 1000W…"
Feb 10, 2015
Jouni Helminen replied to Matt's discussion Micro filament on Tethered UAV
Jan 31, 2015
Pritam Ghanghas replied to Matt's discussion Micro filament on Tethered UAV
"I would still be interested to know "How high is the voltage". Though Hoverfly's tether looks much thicker than cyphy's tether. So I am guessing they settled for more off the self power supplies in the category of 220v or so. In…"
Sep 8, 2014
Pritam Ghanghas replied to Matt's discussion Micro filament on Tethered UAV
"220v is still quite low to send over thin wires. Even if you take a 1200W quad, which is just about minimum power to carry a power supply and camera, the current at 220V comes out ot be about 6A. 6A wire will be quite thick. The kind of wires that…"
Sep 5, 2014

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Comment Wall (2 comments)

At 4:04am on April 10, 2009, Kelvin Nicholson said…
Hey Matt:

Just noticed you're from Sydney as well - interesting coincidence.

Did you ever get a reply about using XBees to control your plane? I'm contemplating building my own PCB to tie the various components together, but if the ArduPilot can handle an uplink, that would be much easier.

Have a nice easter,

Kelvin
At 6:29am on August 23, 2009, Connor said…
Hello
I'm trying to find out if it is possible to control a UAV throw xbee from a laptop? I was reading an old post of yours and was wondering if you had found out if it’s possible. Even if direct control is no possible can new GPS coordinates be uploaded to the ardupilot while in flight?

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