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Re: [Paparazzi-devel] LPX530AL Gyro board - would it work?


From: Prof. Dr.-Ing. Heinrich Warmers
Subject: Re: [Paparazzi-devel] LPX530AL Gyro board - would it work?
Date: Wed, 21 Apr 2010 22:22:18 +0200
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; de-DE; rv:1.4) Gecko/20030619 Netscape/7.1 (ax)

Hi all,
same answer to the questions,
we have flown quadrocopter to with 150°/s from Analog Device with the tiny 13. It works (but 300°/s seems to be better).
We made also a test with a low cost saprkefun IMU with the new st rate sensos, it worked to.
This  IMU cost  about 67 Euro in Europe. If you want the software to test  it  have a look to the HB-Autopilot software.
I was relay  surprised   that we take a test successfully wiht the low cost IMU. The old sensors  from ST lSY300  failed.
 Have a look here http://vimeo.com/10134857
You can also low cost sensors IDG500 and IDZ500. The ETH fly wiht them.
A low cost hardware is the  spakrfun imu and the twog.
By the way the adxrs610 sensor on the booz and hb-autopilot  pcbs  is the best of the marked.

Sincerely,
Heinrich Warmers



David Carlson schrieb:
Rokas,

That adapter will allow you to have a backup battery (capacitor) attached to the board.  I have two of them and they work just fine.  This is also the reason that the wires are not very securely fastened.  There is no way to do it without removing that male adapter.  So that just leaves attaching to small resistors and capacitors.  When I return I hope to have some of those boards made.

Buzz

On 04/20/2010 10:33 PM, Rokas Adiklis wrote:
Good evening everyone,

first of all - huge thanks for all the work you guys have created! It's amazing how professional things can be done in opensource way. I have some questions, maybe you could help me out a bit.

I was looking for a cheap gyro, and came up with this one:

http://store.diydrones.com/product_p/br-trigyro-lpx530al.htm

It seems to have analog outputs, and 2.7-3.6V input. I don't have a good knowledge in electronics, so I would very much appreciate your professional oppinion - would it work with TWOG? As far as I understand, I will only be able to use two channels, as I couldn't find anything about third axis (YAW) gyro configuration in airframe file. So maybe two of these would be a better choice?

http://store.diydrones.com/product_p/br-0005-10.htm

Also, I saw that the recommended gyro (ADXRS613) has sensitivity of 150deg/s, and the above ones have double of that (300deg/s). How would this influence the performance?

And last, but not least - I'm changing my GPS receiver to "LEA-5H with Active Sarantel helical" (from CheBuzz). It doesn't have internal battery (so it starts up longer), and it came with wires ripped off. The latter is not a big problem, but I've found this adapter, that might solve both issues:

http://store.diydrones.com/product_p/br-0008-01.htm

Do I get it right - if I attach this adapter to my GPS receiver, it would enable it to hotstart, and to have a more convenient cable plug?

I have way more questions left unaswered, but I'll stop for now, as I haven't read EVERYTHING yet :) And thanks in advance for your support.

Sincerely,
Rokas Adiklis.
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