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Re: Omni-wheel providers

I didn't try them. I like the Rotacasers a lot. It is a pitty they sell them by the pair though, you normally need three.
by aswin0
30 Sep 2013, 21:59
 
Forum: Mindstorms Hardware
Topic: Omni-wheel providers
Replies: 3
Views: 2569

Re: hitechnic Gyro sensor (NGY1044) noise

You should also note, that some "drift" is actually very correct. The earth rotates 360*/24 hours (once a day). That means that you should see a "drift" of 1 degree every 4 minutes. This is not correct. That is, this is only correct if you live on the north or south pole. On the...
by aswin0
27 Aug 2013, 07:05
 
Forum: Mindstorms Hardware
Topic: hitechnic Gyro sensor (NGY1044) noise
Replies: 78
Views: 35196

Re: IMU sensor feat. digital motion processing

doc-helmut wrote:In your clips it looks like as if you used a HT Gyro (1) and a Dexter gyro (3), didn't you? (Not sure what you show in the 2nd video.)

Clip 1 and 2 show a home brew IMU sensor housed in a sound sensor case, clip 3 shows a Dexter Industries IMU sensor.
by aswin0
13 Aug 2013, 08:06
 
Forum: Mindstorms Hardware
Topic: IMU sensor feat. digital motion processing
Replies: 20
Views: 13183

Re: IMU sensor feat. digital motion processing

Hey Doc, I know of your complicated relation with Java. I do not have a solution for that (not that you asked for one). The IMU filter you see in the clips is a full blown 9DOF filter. It uses the three sensors you mention and outputs position (as in tilt and heading), rotational speed and linear sp...
by aswin0
12 Aug 2013, 19:29
 
Forum: Mindstorms Hardware
Topic: IMU sensor feat. digital motion processing
Replies: 20
Views: 13183

Re: Batteries and Battery packs

Thanks! Very informative.

Have you, or anyone else, experience with the new NiZn batteries?
by aswin0
11 Aug 2013, 22:48
 
Forum: Mindstorms Hardware
Topic: Batteries and Battery packs
Replies: 5
Views: 3503

Re: IMU sensor feat. digital motion processing

THE DSP thing can be done on the NXT. Here are three clips that I shot using a IMU sensor. I do not think a compass was included while I shot the clips, but it currently is. Sorry for the poor quality, you'll have to watch the NXT screen carefully. On it you'll see a compass rose or an image of the ...
by aswin0
11 Aug 2013, 21:20
 
Forum: Mindstorms Hardware
Topic: IMU sensor feat. digital motion processing
Replies: 20
Views: 13183

Re: Setting custom frequency for nxt motor

Hi, You should not try to control the speed of the motor. Instead you should try to control the position of the motor. This is far more direct and has the possibility to recover from previous errors. I know NXT-G will allow you to control the position of a NXT motor, but I do not know how good this ...
by aswin0
27 Jul 2013, 11:07
 
Forum: Mindstorms Software
Topic: Setting custom frequency for nxt motor
Replies: 11
Views: 6314

Re: Screen flickered then died.

These problems all have a similar cause. The contacts for the four push buttons are on the same board as the connector to the screen and some capacitors. Pressing a button stresses the board and, in the end, cracks the solder of the capacitors or connector. It would be interesting to know if Lego im...
by aswin0
30 Jun 2013, 23:27
 
Forum: Mindstorms Hardware
Topic: Screen flickered then died.
Replies: 23
Views: 15379

Re: NXC interface to smartphone cam?

If you don't mind getting your pc involved and pay for some software then this might be an easy solution. You could use Some software to turn your phone into a webcam. See http://arelab.blogspot.com/2012/10/how-to-use-mobile-phone-camera-as-usb-webcam.html Then you could use roborealm with your new ...
by aswin0
24 Jun 2013, 11:41
 
Forum: Mindstorms Software
Topic: NXC interface to smartphone cam?
Replies: 15
Views: 7910

Re: Screen flickered then died.

I did it three times already. Two times I succeeded, once I was without luck. But even then things did not get worse.
Do not forget to place the soft rubber button (from the batterybox) back while assembling.
by aswin0
09 Jun 2013, 07:34
 
Forum: Mindstorms Hardware
Topic: Screen flickered then died.
Replies: 23
Views: 15379
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