Subject:
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Re: Directly connecting a digital camera module to the RCX
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 21 May 2005 19:41:10 GMT
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Viewed:
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3008 times
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Thanks ! (Also, for your precious e-mail advice.)
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You’re welcome ;o)
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I added another small program • to send a GV (get version) to the CMUCam2. The result is first an acknowledge
“ACKr”then a message “CMUcam2 v1.01 c6r:”. However, every second package
doesn’t read the first two characters correctly. So, we get the ASCII series
after the ACKr :
3 255 85 99 97 ... instead of
67 77 85 99 97 ...
Probably the CMUCam2 introduces a pause after the ACKr.
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Why could it be a problem?
I’m afraid no :-(
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After half an hour of work with the module, the RCX starts getting hot in the
area of the C- output connector. The 200mA are perhaps too a heavy load.
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According to my measurements:
voltage drop at 200mA is about 1.5V, so pover dissipation in the driver IC is
about 0.3W, well within the capability of the package. Moreover the driver
includes a very effective thermal shutdown (I triggered it quite a few times
while testing RC-motors on RCX).
Philo
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