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Mark Tarrabain wrote:
>
> c s soh wrote:
> > Is this what you're looking for?
> > A 3/8 RCX Output Multiplexer for the FT solenoid valves:
> > http://www.ozbricks.net/cssoh1/cpedia/ftmulti.htm
> >
> > Btw, the circuit diagram is a piece of art from France :-)
>
> Close. What I would actually be wanting is eomthing that could use the
> voltage level being output from a *SINGLE* RCX port to do the
> addressing. So for controlling up to four devices from one port, for
> example, would require that 25% power to the port control the first
> device, 50% the second, 75% the third, and 100% the fourth, and the
> direction of the current flow would determine whether I was wanting the
> addressed device to be flipped one way or the other. The devices would
> be such that when no control signals were being applied at all, they
> would retain their last set state (this may require a constant available
> power supply to the devices themselves, but I'm okay with that). By
> dividing up the RCX motor voltages into even smaller divisions, I'm
> betting that you could probably control a dozen or more such devices.
Wow, that'll be great!
> To my understanding, the RCX uses pulse width modulation to actually
> control motor speed, so I'm thinking the first thing you'd need is a
> capacitor to even out an RCX output to a level voltage, then an ADC to
> convert that into a digital signal, and a demux to take that digital
> signal to address any one of several individual devices. I don't own
> the appropriate hardware to try this idea out though. If I did, I'd
> probably just do it myself and if it worked, I'd just announce it.
Keep at it.
--
C S Soh
http://www.ozbricks.net/cssoh1
....where air is power!
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Message is in Reply To:
 | | Re: EGAD! (pneumatics)
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| (...) Close. What I would actually be wanting is eomthing that could use the voltage level being output from a *SINGLE* RCX port to do the addressing. So for controlling up to four devices from one port, for example, would require that 25% power to (...) (21 years ago, 15-Jun-03, to lugnet.technic, lugnet.robotics)
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