Subject:
|
Re: Another DIY sensor
|
Newsgroups:
|
lugnet.robotics
|
Date:
|
Fri, 17 Nov 2000 23:55:24 GMT
|
Original-From:
|
Stephan Adelsberger <astephan@dec1.wi-inf.uni-essen!Spamless!.de>
|
Viewed:
|
694 times
|
| |
|
|
> But the electronics on the inside are unlikely to give
> you pulses back out, except in the form of serial port data (IE, PS/2,
> which is more or less an RS-232 port at 5 volts rather than +12/-12.)
All optical mice use the HDNS-2000 (short: HD 2000) chip from Agilent
Technologies. There are two output modes: the rs232 output and the
quadrature output mode. The quadrature output gives the Delta X and Delta Y
values (how much the x,y coordinates changed). The chip can track motion up
to 30 inches per second which is fast enough for most robotics applications.
I’ve heard that optical mice are available for about USD 30 somewhere.
The data sheet of the HDNS-2000 chip is available at:
http://www.semiconductor.agilent.com/cmos/hdns2000.html
Steve
--
FIRC lego robot contest
http://www.roboticspage.com
Martin schrieb:
> John Barnes wrote:
>
> > That reminds me. A while ago now, someone here suggested trying
> > out the guts of one of those ball-less optical mice as the basis for
> > a sensor to watch the floor go by under the robot. Did that get
> > anywhere? Does anyone even know how those things work? Are
> > they still $50?
>
> Those cameras have a small, low-resolution CCD in them, and they take
> snapshots of the mousing surface and compare them to detect the quantity
> of motion.
>
> If you were going to use one of those mice your best bet would be to put
> together a sensor interface using a PIC chip to simply interface with
> PS/2. Then you could also get some touch sensors out of it (IE, the
> mouse buttons.) But the electronics on the inside are unlikely to give
> you pulses back out, except in the form of serial port data (IE, PS/2,
> which is more or less an RS-232 port at 5 volts rather than +12/-12.)
>
|
|
Message has 1 Reply:
 | | Re: Another DIY sensor
|
| I forgot to mention that two optical mice are needed for accurate navigation. With only one sensor you cannot track if the robot turns. I think it’s a good idea to buy a optical mouse because I haven’t seen any suppliers carrying the HD2000 chip. If (...) (24 years ago, 18-Nov-00, to lugnet.robotics)
|
Message is in Reply To:
| | Re: Another DIY sensor
|
| (...) Those cameras have a small, low-resolution CCD in them, and they take snapshots of the mousing surface and compare them to detect the quantity of motion. If you were going to use one of those mice your best bet would be to put together a (...) (24 years ago, 16-Nov-00, to lugnet.robotics)
|
6 Messages in This Thread:
  
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
This Message and its Replies on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
