 | | Micro-Switches, Mux
|
| 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 (...) (24 years ago, 26-Feb-01, to lugnet.robotics.rcx)
| | | | | Re: Micro-Switches, Mux
|
| 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
|
| 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)
| | | | | Re: Micro-Switches, Mux
|
| "Stef Mientki" <s.mientki@ids.kun.nl> wrote in message news:3A9C14C9.76834B....kun.nl... (...) (URL) job Stef, that's a really helpful page. I built a version of TFMs mux ((URL) a while ago but I used resistor values that are not ideal (10k, 20k, (...) (24 years ago, 28-Feb-01, to lugnet.robotics.rcx)
| | | | | Re: Micro-Switches, Mux
|
| "Stef Mientki" <s.mientki@ids.kun.nl> wrote in message news:3A9C14C9.76834B....kun.nl... (...) Nice work. I've found the contact resistance of the LEGO switches vary so much you can't get a 4 way mux to work reliably. With real micro switches I'm (...) (24 years ago, 28-Feb-01, to lugnet.robotics.rcx)
| |
