Subject:
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Re: R2D2 Sounds - A Warning my RCX has laryngitis.
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 22 Jun 2005 09:54:45 GMT
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Viewed:
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1065 times
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In lugnet.robotics, John Reynolds <john-reynolds@rocketmail.com> wrote:
> I was getting to the point where I could generate a
> number of similar friendly sounds and then the RCX
> stopped generating sounds completely (except for beeps
> from the On-Off button when pressed). This happened
> within an hour!
>
> I can only assume that the repeated intensive use of
> the oscillator circuit has burnt out some component.
> All other functions of the RCX seem to be intact.
>
> Does anyone know the location of a circuit diagram for
> the RCX?
Here is the sound driver section:
http://www.brickshelf.com/gallery/Philo/RCX-comp/sound_driver.gif
(Mark Bellis, if you read this you can add this schematics to your RCX circuit
collection to get everything together)
It seems impossible that you have fried anything if you still get on/off sound:
there is only one buzzer driven by a simple circuit, so the hardware can't be
wrong here (and I don't think it could ever get "tired" with the 330 ohm series
resistance...)
So I suggest you follow Claude's suggestions who posted while I wrote this ;o)
Philo
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Message has 1 Reply:
 | | Re: RCX sound circuit
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| (...) Your circuit diagram checks out Philo, though a 47k resistor to ground should be added to the processor connection. As soon as I get access to Visio again, I'll write it up and post it with a credit. I was wondering what the other NAND gate is (...) (19 years ago, 25-Jun-05, to lugnet.robotics)
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Message is in Reply To:
| | R2D2 Sounds - A Warning my RCX has laryngitis.
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| I recently read a post from someone wanting to generate friendy sounds similar to R2D2 using an RCX. I thought this was a good challenge so set out to try. I was getting to the point where I could generate a number of similar friendly sounds and (...) (19 years ago, 21-Jun-05, to lugnet.robotics)
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