Subject:
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Micro-Switches, Mux
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Mon, 26 Feb 2001 23:15:10 GMT
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Viewed:
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1407 times
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Hi, has anyone had any joy combining the input from several micro-switches
into one RCX input, I've built a simple multiplexor for three lego touch
sensors, but now I need four!! .. I know this can be done by adjusting my
current design, except I can't afford to wait for the three weeks it will
take for me to receive a new Lego Touch sensor from dacta, however I have
lots of micro-switches lying around.
I imagine its easier to combine many micro switches as they are just simply
on off switches so the boundaries are much easier to compute...
Thank you very much for any help you can provide
- Ciaran
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Message has 2 Replies:
 | | Re: Micro-Switches, Mux
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| Knowing the resistor inside the RCX is 10 kOhm, you should use a different resistor for each switch, the first resistor should be 10 kOhm, the second 30 kOhm, third 70 kOhm, fourth 150 kOhm, this will divide the 5V range in nearly evenly spaced (...) (24 years ago, 26-Feb-01, to lugnet.robotics.rcx)
| | | Re: Micro-Switches, Mux
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| There was some doubt in another newsgroup (lugnet.robotics) about my suggestions, so I've made an overview, with drawings om my website (it has also some more pratical values of the resistors), (...) met vriendelijke groet, (24 years ago, 27-Feb-01, to lugnet.robotics.rcx)
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