Subject:
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Re: RCX port information
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 18 Dec 1998 02:06:30 GMT
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Viewed:
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1703 times
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Markus L. Noga <lego-robotics@crynwr.com> wrote:
> Jasper Janssen wrote:
> >
> > On Sat, 12 Dec 1998 11:50:20 GMT, lego-robotics@crynwr.com (Markus L.
> > Noga) wrote:
> >
> > > More specifically, the microcontroller has 8 A/D input pins. Right now,
> > > four of them are used - Sensor 1 through 3 and battery voltage. These
> > > are A/D channels 0-3 in group 0, so they take pins AD0..AD3. However,
> > > the A/D input pins double as Port 7 digital input pins. Pin 6,7 are
> > > connected to the program and view buttons, respectively. This leaves
> > > candidates AD4/5.
> >
> > Whoa... so you mean, I can just like, take apart a 9V lead, solder
> > them to those pins, and have 2 extra sensor inputs? or is there extra
> > 'lectronics involved?
>
> Nobody tried so far. The above is merely speculation - that's why I said
> "candidates". Should the pins turn out to be unused, legOS will support 6
> A/D channels with minor changes.
The pins are 99% definitely unused.
To whoever tries this, good luck with that soldering iron.
-Kekoa
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Message has 1 Reply:
 | | Re: RCX port information
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| (...) I should clarify this before anyone breaks their RCX. The pins are 99% definitely unused. By the ROM driver. They might, however, be tied to Vss or Vdd, so make sure you don't short anything out if do attempt to solder something to the extra (...) (26 years ago, 21-Dec-98, to lugnet.robotics)
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Message is in Reply To:
| | Re: RCX port information
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| (...) Nobody tried so far. The above is merely speculation - that's why I said "candidates". Should the pins turn out to be unused, legOS will support 6 A/D channels with minor changes. I have some software to work on right now, and I have a student (...) (26 years ago, 17-Dec-98, to lugnet.robotics)
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