Raspberry Pi

[iter]

I have a feeling that wouldn't be legal...

If another amateur public prosecutor brings up the supposed illegality of flight control systems, and I'm going to mention Nazis on purpose, to force Kevin to kill this thread.

Please don't let this thread die a horrible death.

Ari.

[mdoering]

I'm going to mention Nazis on purpose

Wow, you took that to a whole new level there. Nazi? Really? Because i expressed a very clearly stated FEELING? In other words, knowingly unproven, possibly wrong, and "take this with a grain of salt"

I didn't express any intent to kill the thread, i encouraged the use of the OP's chosen technology platform... Go back to your hole or build some rockets... no need to start flaming other members... there are far more constructive things you could be doing.

[MarkII]

Raspberry pi?

The kind you find in a second-hand store?

[troj]

If another amateur public prosecutor brings up the supposed illegality of flight control systems, and I'm going to mention Nazis on purpose, to force Kevin to kill this thread.

Please don't let this thread die a horrible death.

Ari.

Doing so will also get you an infraction

It's not an acceptable tactic to kill a thread you don't like

[iter]

I like this thread! I want it to stay on topic. What I dislike is the fun police trolls. I dislike trolls so much that I'm willing to risk an infraction.

Ari.

[bradycros]

I like this thread! I want it to stay on topic. What I dislike is the fun police trolls. I dislike trolls so much that I'm willing to risk an infraction.

Ari.

Get two, there free.

[fyrwrxz]

Raspberry pi?

The kind you find in a second-hand store?

I refuse to overlook your contribution-I see your raspberry pi and raise you an abacus, also found in the second hand store....( this is so far over my head I can barely see the contrails...)

[RadManCF]

I refuse to overlook your contribution-I see your raspberry pi and raise you an abacus, also found in the second hand store....( this is so far over my head I can barely see the contrails...)

Hey, I suspect you missed the Prince reference. Out of curiosity, do you work part time in a five and dime?

[fyrwrxz]

Oh so not-just didn't want to state the obvious....(the artist formerly known as dave...)
(dammit now that stupid song is stuck in my head-thanx alot Mark!!)

[MarkII]

Oh so not-just didn't want to state the obvious....(the artist formerly known as dave...)
(dammit now that stupid song is stuck in my head-thanx alot Mark!!)

Sorry ... I was just busy doing something close to nothing, but different than the day before.

[kruland]

Just found this link on Slashdot http://www.pcpro.co.uk/news/educatio...erry-pi-course Might be edutational.

[troj]

In addition to a second Raspberry Pi, I've also now acquired a Gertboard (IO Board), which needs to be put together, along with a nice 7" LCD touchscreen.

The latter just arrived today; I've kludged together enough cables to get it working, as well as having to figure out the controls, to select the input.

Thus far, I've verified that it works, and it works with the Pi, as well as verifying that the touch screen needs to be calibrated. First, though, I'll probably reconfigure my Pi, to get it running at a more sane resolution for such a small screen!



-Kevin

[DM1975]

That's cool

[rheil]

I have a Pi ordered and am anxious to work with it. I've buolt an Arduino weather station, number of controllers and am looking forward to a more powerful processor like PI.

Integrating a flight recorder and reasonably powerful processor with a transmitter (may even be able to create a simple transmitter in the PI itself - http://hackaday.com/2012/12/10/trans...onal-hardware/ ) and a number of sensors (stress sensors, acceleration, pressure, temp, etc. and later maybe some stability control (using canards direct on servos)... so many possibilities.

Also an interesting low cost ground station.

I see at as some others here, another aspect to make the sport interesting.

[G_T]

I'd like to build a basic rocket avionics system that has the following components:

Rate gyros on three axis.
Magnetic field sensors on three axis, that can then be used to control for drift of the rate gyros.
Three axis accelerometer.
Additional high range accelerometer for the Z axis.
Temperature sensing.
Barometric sensing with two sensors, one optimized for accurate readings in the altitude range of main deployment, and one optimized for high altitudes.
GPS.
Bi-directional telemetry and control, with encrypted control.
Pluggable interface connection at the pad.
Data storage and retrieval, high rate and large capacity.

I'd like additional modules for event control, such as pyro events or motor throttling.

I'd like the ability to interface with additional components.

Once I had that, there is quite a bit of interesting stuff I could do. Raspberry Pi may not be an optimal solution and I'm not going to speculate on that. But current altimeters are far from optimal solutions.

Gerald

[iter]

Most of the features you describe are orthogonal to the CPU type on your board. I encourage you to look at Ardupilot--less for the autopilot features and more for the tight sensor integration. It has native telemetry (on 433 or 900 MHz), GPS, baro, 3x magnetometer, 3x accelerometer, 3x gyro, etc. If you decide you need sophisticated calculations on board, you can take serial output from AP and feed that to your RPi.

Ari.

[gpoehlein]

Not playing thread necromancy here, but I finally bit the bullet and ordered a Model B Pi along with a small TV, case, WiFi Dongle and an SD card with Raspbian already installed on it. I ordered from Adafruit, and with any luck it'll have it by the end of this week or early next. Can't wait to start playing with it!

[troj]

Not playing thread necromancy here, but I finally bit the bullet and ordered a Model B Pi along with a small TV, case, WiFi Dongle and an SD card with Raspbian already installed on it. I ordered from Adafruit, and with any luck it'll have it by the end of this week or early next. Can't wait to start playing with it!

They're nifty devices, that's for sure!

I ultimately determined they draw too much power for my planned use

If you have need one of, I have a small (7", I think?) touch screen LCD that works with it that I'd part with.

-Kevin

[gpoehlein]

They're nifty devices, that's for sure!

I ultimately determined they draw too much power for my planned use

If you have need one of, I have a small (7", I think?) touch screen LCD that works with it that I'd part with.

-Kevin

I'll think about that screen. I mostly plan to use mine to learn Linux and play around with programming - I miss having a "programmer's machine". I may end up ordering a second one later on just to play around with networking. I might end up using it in some sort of project (not rocket related), but right now it's just a "Hacker Special" (in the old fashioned MIT Hacker sense )

[bdale]

The Telemetrum uses an 8051 MCU core which is rather old and simple and you could probably run it under an 8051 emulator on the Pi, but that is rather absurd...

Actually, AltOS (the firmware) has been ported to several processor architectures. In addition to the 8051 core, it also supports a couple AVR targets and ARM Cortex M0 and M3 based SOC parts. So, you could at least in theory run AltOS on a Pi board if you were up for doing the port. But as others have noted, the Pi is gross overkill for this...

[bdale]

I'd like to build a basic rocket avionics system that has the following components:

Rate gyros on three axis.
Magnetic field sensors on three axis, that can then be used to control for drift of the rate gyros.
Three axis accelerometer.
Additional high range accelerometer for the Z axis.
Temperature sensing.
Barometric sensing with two sensors, one optimized for accurate readings in the altitude range of main deployment, and one optimized for high altitudes.
GPS.
Bi-directional telemetry and control, with encrypted control.
Pluggable interface connection at the pad.
Data storage and retrieval, high rate and large capacity.

I'd like additional modules for event control, such as pyro events or motor throttling.

I'd like the ability to interface with additional components.

Once I had that, there is quite a bit of interesting stuff I could do. Raspberry Pi may not be an optimal solution and I'm not going to speculate on that. But current altimeters are far from optimal solutions.

Gerald

FYI, what you've described bears a striking resemblence to the feature list for TeleMega. Brilliant minds, and all that.. ;-)

[billspad]

I'll think about that screen. I mostly plan to use mine to learn Linux and play around with programming - I miss having a "programmer's machine". I may end up ordering a second one later on just to play around with networking. I might end up using it in some sort of project (not rocket related), but right now it's just a "Hacker Special" (in the old fashioned MIT Hacker sense )

I got one to replace on an old XP box in my workshop that I use to look stuff up on the Internet. After I started playing with it I realized it could do much more. I've got it set up now so I can run it remotely from the computer in my office in the next room. That I can do it is really amazing to me because several previous attempts to play with Linux left me extremely frustrated. Encouraged by that, I bought a couple of A to D boards that I'm going to attempt to connect to a static test stand. Of course that means I'm going to have to learn Python. The last language that I knew (and I'm being generous in describing my skill level) was BASIC. I'm sure I can figure it out but I really miss line numbers.

[gpoehlein]

I got one to replace on an old XP box in my workshop that I use to look stuff up on the Internet. After I started playing with it I realized it could do much more. I've got it set up now so I can run it remotely from the computer in my office in the next room. That I can do it is really amazing to me because several previous attempts to play with Linux left me extremely frustrated. Encouraged by that, I bought a couple of A to D boards that I'm going to attempt to connect to a static test stand. Of course that means I'm going to have to learn Python. The last language that I knew (and I'm being generous in describing my skill level) was BASIC. I'm sure I can figure it out but I really miss line numbers.

There is a TinyBASIC port to Raspbian - I plan to install it on mine. Since I don't have mine yet, I don't know if it can talk to the io ports, though.

[Derek]

Of course that means I'm going to have to learn Python

python is really easy. it is like modern basic.

[G_T]

Unless I'm mistaken, that needs to be attributed to XKCD. That's unless you're the author.

Gerald