春情荡漾_堕落街传奇_女高中生第一次破苞av

Constantin — Sun, 15 Jun 2014 20:09:23 +0000

Great work.
I as a student currently working on a similar project.
Does anyone have any idea what pressure sensor did you use?

Malcolm Moreno — Wed, 26 Mar 2014 12:35:48 +0000

In reply to Dave Akerman.

Hi, my name is malcolm and I’ m ICT teacher in a secondary school in Santaigo, Chile.
I’ m plaining to launch a bolloon with hopefully some weather data loggers and a tracking system and offer the project to 15 sisteen years old students.
I know there are many ways to do so, from buying the balloon pack including GPS, the balloon itself and every thing all ready made to start from the scratch using arduino or a 远东1628 pi.

so the question is: could you help us to echieve this??

Thanks a lot

Malcolm Moreno

Jenny Doré — Sat, 08 Mar 2014 00:39:24 +0000

Hey there, thought I’d share my high altitude project with you, please take a look at my film below, and the launch for Zoo magazine with the massive support of David Akerman!

I’m sure he can help me explain the technical genius behind it, since we were using his state of the art trackers! Hope you enjoy, please share etc :) Jenny

http://www.youtube.com/watch?v=o_U57ow-NHs&list=UUUm6Y1TgZdVfrkNTkOMTpfQ

dias — Fri, 04 Oct 2013 23:54:01 +0000

Great article. I will be dealing with many
of these issues as well..

Rothariger — Thu, 25 Jul 2013 15:11:02 +0000

Hi,

what about the temperature problem?
there was only -32°C? i was thinking that was much more cooler.

thanks for the info!

Rick Maschek — Thu, 25 Jul 2013 02:52:59 +0000

In reply to Jim Manley.

Hi Jim,
The S4 program sounds great. If you launched at Lucerne I believe your rockets were ammonium perchlorate composite (APCP) powered. Is the event in September ARLISS?
http://www.arliss.org/
or XPRS?
http://www.xprs.org/

Good luck on your next payload and on getting to 238,900 miles (the moon?) someday!

Rick

KA9Q — Wed, 24 Jul 2013 22:19:44 +0000

Nice work! What did you do for power? The Pi is a great platform, but it’s a bit weak in the electrical power department. I’d avoid the USB connector and solder the supply directly to the board, and I’d probably bypass at least the 3.3V linear regulator with a switcher to improve efficiency. The Pi was designed mainly to teach programming, so I guess power consumption wasn’t a big issue.

Marc — Tue, 23 Jul 2013 15:52:11 +0000

In reply to Dave Akerman.

Use a directional antenna on the ground station as well, preferably one that can be pointed. Other Pi projects concerning the automatic steering of the receive antenna on the ground to track the “Pi in the sky” come to mind.

What fun awaits …

Dave Akerman — Tue, 23 Jul 2013 06:56:37 +0000

In reply to Joshua Braithwaite.

Line of sight.

Although we only use 10mW transmitters (because that’s all we’re allowed to use in the UK from an airborne device), the balloon can be tracked from a long distance away because there’s nothing between it and the receiver to block the radio waves.

If you don’t have line of sight, you need power. Possibly lots of it.

In your case, a couple of radio modems say around 1W with aerials up on poles may well do that sort of distance. Depends on how flat the land is.

Joshua Braithwaite — Mon, 22 Jul 2013 23:41:42 +0000

This is amazing! Does anyone know how they were able to transmit that far? I’m looking at building something similar (but on the ground) that records data in the Australian bush and sends it to a base station a couple of kilometres away.