Yes it does. It is a proven pact that the RCX touch sensors don't work properly with the touch sensor multiplexers that are available. That was the reason that this multiplexer was made (or one of the reasons anyways). So, as you can see, you can build a really cheap one that supports 8 sensors, and doesn't have a problem with the resistance changing, (not to mention it is about as easy as any I2C interface to build). If you don't want to deal with designing all of the circuit, you could get the Mindsensors PCF8574 kit and solder on 4 RCX wires (cut in half, for 8 ends), and have a nice multiplexer for about $30 worth of products.doc-helmut wrote:that blows me away!
Could that mean, if I'm using RCX Touch sensors instead of the NXT ones (having different internal resistors), that the returned values could be distorted?
(actually i intended to use RCX or 3rd company hardware switches for my robot project)
You can multiplex 8 RCX switchs to one NXT sensor port, via I2C, like McNamarra does here: http://www.rjmcnamara.com/2010/06/10/8-input-rcx-touch-sensor-mux/
Or use the "old" technique, 4 RCX switchs to one NXT or RCX sensor port, via analogic raw value, all switchs connected to the port by a resistor network, as described here: http://www.techno-stuff.com/swmux.htm.see under specification and technical description
doc-helmut wrote:I actually bought the HT TMux because I wanted a "general" solution and because I didn't want to solder... (
jojoguy14 wrote:the touch sensor can NOT be used as a pressure sensor as it is analog?
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