Subject:
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nxt + i2c sp03 Text-To-Speech?
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Newsgroups:
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lugnet.robotics.nxt
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Date:
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Tue, 5 Dec 2006 04:52:27 GMT
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Viewed:
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12676 times
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I'm a software guy, not a hardware guy. I have very little experience
designing circuits. To show how little I know, I'm actually reading
through Electronics Projects for Dummies at the moment. ;) Well in
this book they describe a simple text-to-speech project and I thought
it would be cool to create a tts module for the nxt. So I've been
doing some research and found this i2c text-to-speech synthesizer,
sp03: http://www.acroname.com/robotics/parts/R184-SP03.html and this
great page on interfacing with the nxt i2c:
http://www.cs.tau.ac.il/~stoledo/lego/i2c-8574/
However after reading through the docs, it appears the nxt only
provides 4.3v, but the sp03 requires 4.5 - 5.5v. For people who know
better, would this mean I wouldn't be able to power it using the power
from the sensor port directly? Would that 0.2v make a difference or
could I use the other wire that supplies 9v for rcx-type analog
sensors to power it?
I also saw mention of speech synthesis interface on the "coming soon"
page at mindsensors
http://mindsensors.com/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=54&MMN_position=22:22
but there's no other info and it really looks pretty "easy" to do it
myself with the sp03, 2 82k pull up resistors, a little hacking, and
some time to figure out how to send the right i2c messages, which I'm
sure I could handle as I figured out how to communicate with the
ultrasonic sensor in ruby.
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Message has 3 Replies:
 | | RE: nxt + i2c sp03 Text-To-Speech?
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| The NXT can also optionally apply 9V to I2C sensors on the same input/wire that is used for reading the analog values. There's a flag to set this up. I know it is accessible in RobotC and I think you should also be able to set it up via NBC. SO (...) (17 years ago, 5-Dec-06, to lugnet.robotics.nxt)
| | | Re: nxt + i2c sp03 Text-To-Speech?
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| Hi Tony, (...) Nice little beast! (...) Most probably it should work. I am a bit more concerned about current consumption (80mA - not 80mAH as shown in documentation!), since the 4.3V supply can deliver 180mA for ALL seven NXT ports. You may also (...) (17 years ago, 5-Dec-06, to lugnet.robotics.nxt)
| | | Re: nxt + i2c sp03 Text-To-Speech?
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| (...) I'd say its worth a try from the 4.3v supply from the NXT. I note that the SP03 spec. says it has a 3v regulator onboard, so its not really running from 5v anyhow. The I2C signals are open drain, so they should be ok unless their inputs won't (...) (17 years ago, 5-Dec-06, to lugnet.robotics.nxt)
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