About

Location

London


About Me:

Software Architect, deeply geeky


Hometown:

London


Activity Feed

James Cohen replied to Ken Biba's discussion Truck Adaptation
"v1 of ardupilot is navigation only and should work with an RC car"
Jul 2, 2009
James Cohen commented on Gary Mortimer's blog post Great UK source for Xbee tracking and Ardupilot.
"Great news for us Brits"
Jun 30, 2009
James Cohen posted a discussion
I wondered if it might make sense to support both text (as it does now) and a "raw" TX method for the ArduPilot. With the "raw" mode you could save a few (possibly a lot as a %) bytes per transmission which could mean a faster rate of messages and…
Jun 10, 2009
James Cohen commented on Thomas J Coyle III's blog post UAV support group for North Texas
""UAV support group" sounds like somewhere that down and out UAVs go to get help ;)

On a serious note it's good to see the community spirit."
Jun 10, 2009
James Cohen commented on Blaise Zerega's blog post Chris Anderson's DIY Drone at Maker Faire
"Great presentation"
Jun 9, 2009
James Cohen replied to Andre Crawford's discussion Unmanned Vehicle
"Hi Andre,

As far as I understand the Ardupilot v1 code should adapt well to this.

James"
Jun 8, 2009
James Cohen posted a discussion
I wondered if anyone had tried hacking a cheap bluetooth GPS receiver? There's no lack of them on eBay and with a bit of tinkering it should be possible to disable the bluetooth portion (in case of 2.4GHz interference) and find some kind of serial…
Jun 6, 2009
James Cohen commented on Tom in NOVA's blog post Low cost ($60) 2.4 G Computer Transmitter with Dual Receiver antenna question...
"Hi Tom,

$60 sounds like a steal, it'd be good to hear how it performs.

Antennas work best when their length is matched to the frequency they're working on (transmitters tend to be more sensitive . Doing some quick calculations for 2.4GHz shows…"
Jun 6, 2009
James Cohen commented on bGatti's blog post new altimeter
"Am I right in saying 10hPa is ~200 feet?"
Jun 3, 2009
James Cohen commented on Jordi Muñoz's blog post Wiring up uBlox! (Only for PRO's)
May 28, 2009
James Cohen commented on Jordi Muñoz's blog post Unofficial ArduPilot 2.2 Release
"Looks great Jordi.

I can see the code for reading waypoint data from the EEPROM. Is there any code for writing the waypoint data into the EEPROM?"
May 26, 2009
James Cohen replied to crystal garris's discussion how to hack a camera to allow remote triggering
"Great write-up.

Can I suggest:

step 1.1 remove battery
step 1.2 wait 1 hour

I'm guessing an hour would be enough time for the flash capacitor to discharge?

To be honest I would do:

step 1.1 remove battery
step 1.2 get impatient after 10 mins"
May 22, 2009
James Cohen commented on Jordi Muñoz's blog post ArduPilot Shield Power Divider Theory
"Chris,

It shouldn't be hard to get the two working together happily.

I'll have a look at how it behaves with the Arduino IDE tonight and drop you a private message with details.

James"
May 21, 2009
James Cohen commented on Jordi Muñoz's blog post ArduPilot Shield Power Divider Theory
"Hi Jordi,

It's great to see some documentation on the project. I think it might be difficult for you guys to decide what level the documentation should be made at. Lots of the ardupilot followers/users are very technically capable but now you have…"
May 21, 2009