 | | Re: RCX infra red sensitivity
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(...) Yes, the driver IC is current-limited to about 500mA (and thermal limited too), so it is very hard to destroy! (...) I have used NiMH batteries a lot on RCX, the only adverse effect I noticed is that the power available on motors is nearly (...) (19 years ago, 21-Jul-06, to lugnet.robotics)
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| | Re: RCX infra red sensitivity
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(...) I have not seen them on the RCX, but I have on other devices, where power transisotrs have died. Its all to do (I think) with the characteristics under load, and the fact that larger spikes in current may occur with rechargeables. If the IC (...) (19 years ago, 21-Jul-06, to lugnet.robotics)
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| | Re: RCX infra red sensitivity
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Hi Danny, (...) Have you seen real failures using some rechargeables batteries? I believe that the RCX motor driver IC is really foolproof, and I don't think anything could be destroyed using various kind of batteries (provided that the 9 or 10 (...) (19 years ago, 21-Jul-06, to lugnet.robotics)
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| | Re: RCX infra red sensitivity
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(...) Depending on the kind of rechargeables you are using, they generally have significantly different characteristics. They also often output a slightly lower voltage (about 1.2 or 1.3v per cell as opposed to the expected 1.5). If you have a (...) (19 years ago, 20-Jul-06, to lugnet.robotics)
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| | Re: RCX infra red sensitivity
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(...) Thanks for your replies. Both are RCX2 and I use the Robolab software. In Administrator / RCX settings you can set the RCX IR-power setting to high or low, but both were already in high. After some testing I found out that the main problem are (...) (19 years ago, 20-Jul-06, to lugnet.robotics)
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| | Re: How do you create a new VI for NXT-G?
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Shortly, an SDK will be made available that will allow for NXT blocks to be constructed using the same functions used to make the built-in blocks. The SDK will be made available on the NI site, probably linked from ni.com/mindstorms, and probably (...) (19 years ago, 20-Jul-06, to lugnet.robotics)
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| | Re: Memory - Where did it go?
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I'm coming in a little late on this topic, but I wanted to restate things just a little. NXT programs are built using a library of blocks. These blocks are not "built-in", to the compiler, but are simply shipped and placed in the palette. Each of (...) (19 years ago, 20-Jul-06, to lugnet.robotics)
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| | Re: Almost 300! And another Mindstorms Challenge! And more!
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(...) There was a good discussion a few weeks back... (URL) here's a chance to test out those theories. What is the "Right" speed??... Steve (19 years ago, 18-Jul-06, to lugnet.events.brickfest, lugnet.robotics, FTX)
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| | Re: RCX infra red sensitivity
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(...) I'm guessing one of your RCX units is a 1.0, while the other is a 1.5 (labeled 1.0, but without the power port) or 2.0? There are a very few hardware difference betwen RCX versions, but this is one of them. See: (URL) I think you can adjust (...) (19 years ago, 17-Jul-06, to lugnet.robotics)
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| | Re: RCX infra red sensitivity
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(...) I think you can adjust the transmit value from the software, but not the reception sensitivity as far as I know. IR sensitivity can be affected by battery performance, ambient lighting (though not likely a factor if others are responding (...) (19 years ago, 17-Jul-06, to lugnet.robotics)
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| | RCX infra red sensitivity
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Hello everybody, One of my RCX units is far less sesitive to recieve a IR signal from another RCX than the other ones. Can this be adjusted in some way? Thanks, Eric. (19 years ago, 16-Jul-06, to lugnet.robotics)
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| | Re: NXT to NXT communication?
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(...) Very cool- the differential is very well designed, especially using only parts from the NXT. (...) Thats what I can't figure out how to do. I made a (modded) version of Brian Davis' DAZLR and using my grandfather's NXT have made a Remote (...) (19 years ago, 15-Jul-06, to lugnet.robotics)
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| | Re: reverse ploarity circut protection??
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(...) A bridge may be the only solution, but you will loose 1.2v across the diodes generally. Although it needs work (and is incomplete) I wrote a tutorial on interfacing a simple LED with an RCX, which shows ways using a bridge, or just simply (...) (19 years ago, 14-Jul-06, to lugnet.robotics)
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| | Re: reverse ploarity circut protection??
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(...) Yes, though the things to think about are the voltage drop across the diodes or other devices and the amount of power required. If only low power devices were being driven, such as the IR chip on its own, a simple bridge rectifier made from (...) (19 years ago, 14-Jul-06, to lugnet.robotics, FTX)
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| | Re: How do you create a new VI for NXT-G?
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(...) I don't know... yet. I think there are some further developments in the works on this however. Until then, note that three of the sensor blocks (touch, sound, and light) have the ability to output "raw" values, and two of these sensor blocks (...) (19 years ago, 14-Jul-06, to lugnet.robotics)
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| | How do you create a new VI for NXT-G?
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What is the process for creating a new VI for NXT-G, for like a custom sensor? thx, Aaron (19 years ago, 14-Jul-06, to lugnet.robotics)
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| | Re: reverse ploarity circut protection??
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(...) A bridge rectifier would work, very simple, but I'm not sure it's the best solution. ROSCO (19 years ago, 13-Jul-06, to lugnet.robotics, FTX)
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| | reverse ploarity circut protection??
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hey electronic wizards, i am working on a new lego project to rid the new IR train electronics from the bulky train base and i'm looking to build a circut protector for it. since i am planning on using standard lego conections 2x2x 2/3rds this is (...) (19 years ago, 13-Jul-06, to lugnet.robotics, FTX)
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| | Re: BASIC for the NXT was Re: R21 - Robot Status
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I think that $25,000 should inspire someone to write a basic compiler that spits out NXT Byte code. You could even get by if the compiler was written based using a non-enterprise version of basic. Lamar A retired system programmer/analyst "Chris (...) (19 years ago, 11-Jul-06, to lugnet.robotics)
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| | Re: SDK for NXT
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(...) This May press release stated it would be available in August: (URL) (19 years ago, 12-Jul-06, to lugnet.robotics)
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