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Thanks Philippe, I wasn't sure of the characteristics of the
Cybermaster touch sensors. Also, I didn't want anyone thinking
it was OK to use this guy:
http://www.brickshelf.com/gallery/markril/Misc/touch.jpg
without checking the resistance (yeah, I know it looks
different, but you never know... :-)
Mark
"Philippe Hurbain" wrote:
> > It's basicly made of a touch sensor and a couple wires. The
> > blue 1x2 brick keeps the touch sensor depressed. There's an
> > internal resistor in the touch sensor of about 500 ohms and this
> > does the job handily. (Note: I'm not sure if the other touch
> > sensors Lego makes have an internal resistor, you should
> > check the resistance if you plan to use one of them).
>
> All touch sensors I measured have a "pressed" resistance between 400 and • 600
> ohms (depends on touch sensors and on pressure, more pressure meaning • lower
> resistance).
> Actually there is no separated resistor, you get the internal resistance • of the
> conductive rubber that closes contact.
>
> Note also that Cybermaster touch sensor also has integral "released" • resistors,
> 10K, 12K or 15K according to switch button color (see
> http://peeron.com/inv/parts/879)
>
> Philo
> www.philohome.com
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Message has 1 Reply:
Message is in Reply To:
 | | Re: All Lego Ack Circuit for LDCC
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| (...) All touch sensors I measured have a "pressed" resistance between 400 and 600 ohms (depends on touch sensors and on pressure, more pressure meaning lower resistance). Actually there is no separated resistor, you get the internal resistance of (...) (21 years ago, 18-Jun-03, to lugnet.trains, lugnet.robotics.rcx)
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