 | | nxt + i2c sp03 Text-To-Speech? —Tony Buser
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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 (...) (17 years ago, 5-Dec-06, to lugnet.robotics.nxt)
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| | | | | 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)
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| | | | | | | Re: nxt + i2c sp03 Text-To-Speech? —Tony Buser
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| | | | | | | (...) That would be the LOWSPEED_9V flag? (...) I just might do that. (...) The chip used in the book I have is the SpeakJet (URL) It's a LOT cheaper than the sp03, however, it uses a serial interface and would be a lot more complicated. I'd have to (...) (17 years ago, 5-Dec-06, to lugnet.robotics.nxt)
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| | | | | | | | | Re: nxt + i2c sp03 Text-To-Speech? —Chris Phillips
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| | | | | | | | (...) It sounds like the NXT probably doesn't have enough power available to run that chip, but you might look at using a BUC (Boost-Up Converter) component to bring the 4.3V supply up to a higher level? I've only been peripherally involved with (...) (17 years ago, 5-Dec-06, to lugnet.robotics.nxt)
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| | | | | | | | | | Re: nxt + i2c sp03 Text-To-Speech? —Tony Buser
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| | | | | | | | | (...) If I'm understanding things correctly, could something like this work? (URL) appears to be able to take 2.5 - 5.5v in and give up to 5v out at up to 90mA. It would be great if it could be powered from the sensor port directly instead of having (...) (17 years ago, 5-Dec-06, to lugnet.robotics.nxt)
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| | | | | | | | | | | Re: nxt + i2c sp03 Text-To-Speech? —Chris Phillips
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| | | | | | | | | | (...) That is pretty much exactly what I was talking about. Of course, such a chip cannot increase the available power, it can only tweak the ratio between voltage and current. So this might work for some applications, but perhaps not in this (...) (17 years ago, 5-Dec-06, to lugnet.robotics.nxt)
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| | | | | | | | | | Re: nxt + i2c sp03 Text-To-Speech? —Ross Crawford
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| | | | | | | | (...) There are chips available to convert ASCII text to allophones, although this would increase the power requirements. One example: (URL) actually used such a combination (many years ago) to build a simple speech synthesizer board for my apple (...) (17 years ago, 5-Dec-06, to lugnet.robotics.nxt)
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| | | | | | | Re: nxt + i2c sp03 Text-To-Speech? —Philippe Hurbain
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| | | | | | (...) Yes, but unfortunately the 9V sensor supply is limited to 15mA just like the RCX sensor supply. Not easy to power a module that consumes 80mA... Philo (17 years ago, 5-Dec-06, to lugnet.robotics.nxt)
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| | | | | Re: nxt + i2c sp03 Text-To-Speech? —Philippe Hurbain
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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)
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| | | | | Re: nxt + i2c sp03 Text-To-Speech? —John Barnes
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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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