|
[DPRG] Absolute reference for angular position
Subject: [DPRG] Absolute reference for angular position
From: Dale Wheat
dale at dalewheat.com
Date: Tue May 27 15:17:15 CDT 2008
Eric,
> If you're only going to be using this to calibrate your rotation, you
> could use a beacon and a directional receiver; a 38kHz IR receiver
> module might work for this, if you restricted its field of view. You
> could do something similar with a laser pointer and a photodetector;
> whenever the laser is directly falling on the detector, its value will
> go up sharply.
The IR demodulator works too well at an angle. They have AGC circuits and other
voodoo to pluck weak signals out of the air. I need something that falls off
dramatically as the signal goes out of phase.
What would be the best detector for a red laser beam? CdS sensor? Photodiode?
Any other ideas along these lines?
Thanks,
Dale Wheat
(972) 486-1317
(877) DALE WHEAT
http://dalewheat.com
More information about the DPRG mailing list
|
