I am planning to purchase a few devices for my LEGO RCX. I need advice to choose between Motor powered Sharp GP2D12 infrared distance sensor interface and Long...
You can also use the IR on the RCX to determine if there are any objects in front of the robot and avoid obstacles that way. Did you try that 1st? Then I...
Hi. I just bpught a motor multiplexer, but i am having problems geting it to work. Does anyon have the basic code to make the motors run. Thank you B-)...
Hi. Last year we had purchased a few active sensor multiplexers from mindsensors. This is the outdated kind the comes in a brick with a strip off the side....
Hi Longy590, You need to change the sensor type to touch and then to light with 1/100 s (10 mS) time interval. I assume that the interactive c uses the...
Hi there, some missing parameters were causing this problem in the example program we haev updated the functions on web page also simple test program is here. ...
when i put this script into bricx command center software. i get an error line 66: Error: undefinded variable 'SERIAL_COMM_DEFAULT' line 67: Error: undefinded...
I'm using leJOS with the active sensor multiplexer. When I run the test program posted on the Mindsensors website, all of the sensors hooked up to the...
Looks like your RCX sensor channel of AMUX needs to be realigned. Try connecting in all the 4 different combinations (see the image posted on mindsensors web ...
hi http://www.techno-stuff.com/3wire.htm this interface is analog interface. where as parallax sensor, allthough 3 wire is digital sensor. It return...
Is there any functional difference between these two sensors? It appears in their description that they are identical with the exception of the operating...
No there is no functional difference except the frequency. Ideally higher frequency should have higher resolution, but since RCX does not have high-resolution...
Has anyone on this board taken up the task of writing legOS IR code for the I2C interface? I've checked on lugnet and there doesn't seem to be much activity...
I started looking at the current BrickOS IR code (h8 headers and lnp- logical.c), I also found a pre-LNP IR serial interface on the RCX Internals page that...
Nitin, What are the voltage requirements to drive the motor mux? The docs just say up to 35v. If I'm only using two outputs will 12v or 18v work? Using 12v I...
My search for direct IR in BrickOS lead me be back to an early version of LegOS v0.7 which had direct pre-LNP IR functions. This seems like a logical route as...
I should have mentioned I'm using the I2C interface to drive the motor mux, the only I2C device I have the moment. :) ... functions. ... pulled ... getting ......
Hi Matt, if you are using lego motors then 9 v should be good enough. if you see erratic behavior, make sure that you are using low power IR mode on your RCX...
Hi Nitin, Still getting erratic behavior with low power IR. Is there any significance to the timing of send/recv with I2C? I found that almost always the...
Nitin, Here is the NQC code I've been using in Bricx Command Center to test the I2C interface and the Motor Multiplexor. Any assistance would be greatly...
I added this code: int temp=0; // global in task main() I added: SetUserDisplay(temp, 0); in Check_alive() and Set_motor() I added: temp = Message(); right...
Hi Nitin, Wanted to post a quick update -- I think I have everything working properly. It seems increasing the distance of the I2C IR interface from the RCX's...
Hi! I'm trying to get the RCX-I2C communication to work with lejos, but so far without success. I'm using the program below to send the ALIVE byte to the...
Hi, I have some questions about the 4-stud LEGO connectors that lie on the ends of standard LEGO wires. First, so we don't get confused about orientation,...
... the ... are ... which ... to a ... of ... connect ... You have to look closely at what is happening. Start with a connector and wire. If you hold the...
We have a problem: The mux doesn't seem to switch at all. When connected to the RCX, the three light sensors connected to the multiplexer are all turned on,...
