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 | | Re: Displaying info while debugging
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| Hi Ralph, I mentionned a while ago (see msg #508) that I have a problem with SAVE-SYSTEM. Could it be the same problem? Could it related to the USB driver and that, while saving the system, there is no period of inactivity and the buffer gets full (...) (22 years ago, 4-Jul-02, to lugnet.robotics.rcx.pbforth)
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usb
(score: 1.484)
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| | Re: Anyone know how to build a stall sensor?
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| (...) Yes. I found on article on using the battery voltage to determine the same thing, i.e. more current, less volts. To do it you need replacement firmware. I use leJOS (a Java VM), I'm one if the developers, so I could go in that way. I'm going (...) (23 years ago, 6-Sep-01, to lugnet.robotics.rcx)
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ir
(score: 1.482)
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ir
(score: 1.482)
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| | GP2D12 IR sensor RCX active sensor interface?
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| I recently acquired several Sharp GP2D12 IR distance sensors that I want to attach to the RCX for use in the robotics course I'm teaching at Vassar College. I found an RCX interface circuit for this sensor at (URL) I go ahead and build it, I though (...) (23 years ago, 5-Oct-01, to lugnet.robotics.rcx)
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ir
(score: 1.481)
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| | Re: Sending ir packets
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| (...) Here ya go: Remember start bit (sometimes called 2 stop bit mode) 55 00 D1 ~D1...Dn ~Dn C ~C Add all the normal D parts in a single Byte for Chksum. Code chunk for example ... unsigned char MuxStr[] ={0x55,0xf7,0x08,0x0...xf8,0x07}; count = 7; (...) (23 years ago, 29-Sep-01, to lugnet.robotics.rcx)
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ir
(score: 1.481)
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| | Troubleshooting LeJOS... how?
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| First attempt ever at using leJOS. 1) Windows2000 2) System variable RCXTTY=COM1 3) NQC, ROBOLAB, RCX Code, and VB all work fine 4) New batteries in RCX, new battery in tower 5) lejos lib directory in CLASSPATH 6) lejos bin directory in front of (...) (23 years ago, 26-Jun-01, to lugnet.robotics.rcx.java)
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tower
(score: 1.481)
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usb
(score: 1.481)
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| | Release 2.0 of lejos
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| This is a major release of lejos that includes: - Extensive and flexible support for RCX comms and networking. Giving you various levels of reliability and addressability. The protocol stacks are implemented in Java and a framework is provided to (...) (22 years ago, 22-Jul-02, to lugnet.robotics.rcx.java)
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usb
(score: 1.481)
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| | Re: Sending ir packets
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| Check the source code for NQC (in rcx/RCX_Link.cpp), or even use it as your underlying comms library. You may spot something Dave does that you don't.. Phil. (...) (23 years ago, 29-Sep-01, to lugnet.robotics.rcx)
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ir
(score: 1.480)
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| | Using two RCX bricks in one robot
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| I'm kicking around the idea of building a Mindstorm's based entry for the Trinity College Fire-Fighting Home Robot Contest (see (URL) ). I may be mistaken, but it seems impractical to attempt this task with a single brick... there just don't seem (...) (23 years ago, 18-Sep-01, to lugnet.robotics.rcx)
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ir
(score: 1.480)
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| | Re: GP2D12 IR sensor RCX active sensor interface?
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| (...) Hi Gareth, i build a interface (mutiplexer) using one input for three (ore more with little changes) sharp GP2D12 and a 9V battery. (Actually Michael Gasperi builds it !!!! I only made some changes !!!!) Have a look at : (2 URLs) more general) (...) (23 years ago, 8-Oct-01, to lugnet.robotics.rcx)
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ir
(score: 1.480)
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| | Re: GP2D12 IR sensor RCX active sensor interface?
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| (...) Hi Gareth, I guess the three wire solution won't work. (Not tested it myself) The Sharp GP2D12 have a current consumption of about 35mA-50 mA (at 5V) !!!! Michael Gasperi mentioned that an input of the RCX only give about 15mA. ((URL) techno (...) (23 years ago, 8-Oct-01, to lugnet.robotics.rcx)
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ir
(score: 1.480)
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| | Re: GP2D12 IR sensor RCX active sensor interface?
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| (...) Hi Gareth, maybe you don't need an external regulator ?!?! But, the specs also say that rating of supply voltage is "-0.3 to +7V". Do you know what happens to the sharp if supply voltage rises above +7V ??? (the mux has a supply voltage of +9V (...) (23 years ago, 9-Oct-01, to lugnet.robotics.rcx)
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ir
(score: 1.479)
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| | Re: GP2D12 IR sensor RCX active sensor interface?
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| (...) Thanks. I actually have all your stuff bookmarked already and am aware of your 3 sensor mux :-) What I really want is something simple - like Phillo's design - that is plug-n-play on the RXC. Unfortanately his circuit board is a little bigger (...) (23 years ago, 8-Oct-01, to lugnet.robotics.rcx)
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ir
(score: 1.479)
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| | Re: GP2D12 IR sensor RCX active sensor interface?
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| Hi all, It seems I missed this thread... (...) As suggested by Rainer, if you use an external battery everything is much simpler, you could even use a 4.5V battery to avoid regulator. (...) I don't think you can improve this circuit with a simple (...) (23 years ago, 10-Oct-01, to lugnet.robotics.rcx)
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ir
(score: 1.479)
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ir
(score: 1.479)
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| | Re: Any news on USB support for linux?
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| Keep an eye on legousb.sourceforge.net I've got some file releases going out this week which should meet your needs. (Revived the project, working off of Bret Thaeler's code [been unable to get ahold of him]). -Brendan (...) (22 years ago, 20-Aug-02, to lugnet.robotics.rcx.legos)
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usb
(score: 1.476)
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| | Re: Anyone know how to build a stall sensor?
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| (...) Yes. I just got a rotation sensor. Trouble is that the motors could stop for a variety of reasons (like the robot isn't moving). That isn't the real reason though (I could always handle that in software). The real reason is that ever since I (...) (23 years ago, 6-Sep-01, to lugnet.robotics.rcx)
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range
(score: 1.476)
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ir
(score: 1.476)
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usb
(score: 1.476)
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