"BEAR" ALTIMETERS ???

[Ez2cDave]

I found a link for "BEAR ALTIMETERS" . . . I have no further info.

http://rocket.payload.free.fr

Dave F.

 

[cwbullet]

Bear altimeters are out of France. They are simple to fly altimeters.

 

[rharshberger]

TRF user @bdureau iirc is the individual behind the Bear Altimeters

 

[kenstarr]

Unless I'm mistaken, he has the skinniest deployment altimeter you can buy. Good products. Also if you really want to make your own from scratch he has documented boards, components, code, and everything else on github.
Ken

 

[cwbullet]

Unless I'm mistaken, he has the skinniest deployment altimeter you can buy. Good products. Also if you really want to make your own from scratch he has documented boards, components, code, and everything else on github.
Ken

Yes!

 

[RocketTree]

I have a few of those altimeters but haven’t had the opportunity to fly them yet. Altiuno and Altiduo if I remember correctly. You can get them as a kit or pre-assembled. Hoping to fly them this winter.

 

[crossfire]

Are they a dual deploy?

 

[David_Stack]

Are they a dual deploy?

I believe that those offerings with "Duo" in the model designation are dual-deploy...

 

[Titan II]

Are they a dual deploy?

All the features of their products are detailed on the website shown in post 1.

 

[crossfire]

All the features of their products are detailed on the website shown in post 1.

Is that a yes or no?

 

[Rocket86]

Both apogee and dual deploy are available.

 

[cwbullet]

Is that a yes or no?

The Uno is single deploy and Duo is dual deploy.

 

[alexzogh]

I have an altiduo mini. Bought it as a kit over 7 or 8 years ago. Harder to put together than an eggtimer. It’s so small, to program it, you have to remove the chip, there is no usb, or manual programming on the mini at all. Loved the fact the software is on GitHub, I learned a lot from his code, it is very, very well documented and structured. I think it was the first time I had seen a working Kalman filter outside of a textbook.

https://github.com/bdureau/AltiDuoMini/blob/master/AltiDuo_attiny84_filter.ino

 

[aerostadt]

Boris has a post on this thread.
https://www.rocketryforum.com/threads/b-engine-altitude-competition.172876/

 

[kenstarr]

Heres the board for the Eggtimer Quark on the left compared to the Micro Alti Duo on the right. Quark is just shy of 18mm wide, the Duo board is 15mm wide screw terminals bring it to 17 but it still easily fits in an 18mm body tube!

 

[aerostadt]

Heres the board for the Eggtimer Quark on the left compared to the Micro Alti Duo on the right. Quark is just shy of 18mm wide, the Duo board is 15mm wide screw terminals bring it to 17 but it still easily fits in an 18mm body tube!

Ken, What battery are you using for the Duo?

 

[kenstarr]

Ken, What battery are you using for the Duo?

I'll have to check, it came with a 1s cell, long and skinny. I'll post details tonight

 

[aerostadt]

I've ordered some units from Boris (Bear Altimeters). At first I had some trouble, but Boris has been extremely helpful. I got a replacement unit today (Alti Uno ver 2.2 smt). I just tested it with a 1S Lipo 3.7 volt battery and a light bulb and then with an e-match and it worked fine. I am looking forward to trying this in some of my own applications.

 

[rocketace]

It’s hard to appreciate just how small this little guy is! I have not flown it yet, but with all ground testing I have done it pops the match/light at the same time as my Raven. I got this one to use as a minimalistic backup.

 

[kenstarr]

What rocketface posted, That's the battery I got with mine.
Ken

 

[bdureau]

I have an altiduo mini. Bought it as a kit over 7 or 8 years ago. Harder to put together than an eggtimer. It’s so small, to program it, you have to remove the chip, there is no usb, or manual programming on the mini at all. Loved the fact the software is on GitHub, I learned a lot from his code, it is very, very well documented and structured. I think it was the first time I had seen a working Kalman filter outside of a textbook.

https://github.com/bdureau/AltiDuoMini/blob/master/AltiDuo_attiny84_filter.ino

Thank you all for the nice comments I am having fun developing those and would like to thanks people that have bought boards because it has allow me to invest and continuously improve them. I got the Kalman filter from Cris (@Cerving eggtimer rocketry who also does some affordable and reliable Arduino based altimeters) . The idea is and has always be to be able to have affordable altimeters especially for people living in Europe because it is expensive to import US altimeters.
I have tried out all sorts of boards:
- baro or gyro based altimeters
- dataloggers, gimbal
- servo or ematches outputs
- GPS to find you rocket
and also some boards for motor testStand
half of my boards can connect to a phone or Android tablet and share the result using Whatsapp, email etc ...
latest board firmware can be flash from your Android device
Android apps have been translated to many languages
all the code is available on github for those who wan to contribute. Note that you do not have to be a developer to contribute, new ideas to improve the user interface or bug reports are welcome

 

[PayLoad]

Just saw this, sorry, some nice good simple stuff at fair prices