Subject:
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Pulse timing
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Tue, 27 Jul 1999 11:41:53 GMT
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Original-From:
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r.farnhill@bssl.co.ukAVOIDSPAM
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Reply-To:
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<R.FARNHILL@BSSL.spamlessCO.UK>
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Viewed:
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811 times
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Hi all,
After reading this Tilt Sensor message I had a look at www.analog.com and
found they did samples of the chip. I got two samples the other day and so
made a quick test pcb. The board seems to work ok looking at it with a scope
but now I want
to interface it with my handyboard. The board basically produces a square
wave signal with a duty cycle of 50/50 and as you tilt
the board the duty cycle changes. I want to measure the timing of the pulses
to determine any change in the duty cycle. Could this
be written in C or does it have to be in ASM and does anyone have any sample
code on how to do timing measurements on
the handyboard.
Thanks Russ....
-----Original Message-----
From: Daniel Herring [mailto:edo_ergo_sum@zdnetmail.com]
Sent: Sunday, July 18, 1999 1:29 AM
To: legged-robots@egroups.com
Subject: [legbots] Tilt Sensors
I just came across this today:
http://www.analog.com/iMEMS/products/ADXL202_top.html
It tells how to make a tilt-sensor joystick for your home computer. This
simple circuit is based on the ADXL202 accelerometer made by Analog Devices
(www.analog.com). It looks like this chip would also be a very easy way to
integrate tilt/stability sensing into a walker with a brain as simple as a
Basic Stamp.
Basic Specs:
Separate sensing of x and y with a 60-90 plus and minus range.
Runs off 2.7-5.25 V, ~1mA, 5 milli-g Resolution
I know this isn't new, just thought this was an neat product application,
and I'd be interested in hearing from anyone who's used the ADXL202 for
robotics.
Thanks,
Daniel Herring
nuntius@falcon.cc.ukans.edu
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