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frequency
(score: 1.981)
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 | | A better sound sensor
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| Techno-stuff is pleased to announce their new musical pitch sensor. This Lego-compatible sensor returns a value based on the frequency or pitch of the sound it hears. The sensor has been optomized for use with a flute or recorder, and also responds (...) (24 years ago, 28-Nov-00, to lugnet.robotics)
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frequency
(score: 1.981)
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| | Re: I2C interface
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| Hi Bastiaan, BrickOS only updates the motor register once every millisecond, so when using functions like motor_a_dir(), the highest frequency you can generate is 500 Hz. You can get around this by patching the kernel, or if that seems disagreeable, (...) (21 years ago, 12-May-03, to lugnet.robotics)
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frequency
(score: 1.981)
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| | Re: IR Sensitivity - Was: 1.5/2.0 infrared problem
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| (...) Mine have been apart more often than I'd like, too! :-) (...) My guess would be mostly for increased communication speed. With the higher baud rate, the duration of the 2-byte Spybot/Manas packets is halved. This allows for fewer collisions (...) (21 years ago, 26-Oct-03, to lugnet.robotics.rcx)
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frequency
(score: 1.981)
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| | Long term effect of PWM on train motors?
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| Hi, I went through a lot of postings concerning PWM (Pulse Width Modulation) in this newsgroup. My conclusion is that it is possible. However, I haven't seen any description of the longterm (after) effects of PWM on the motor itself. So I have a few (...) (20 years ago, 21-Jul-04, to lugnet.trains)
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frequency
(score: 1.981)
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| | Re: Another update for WIRRL
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| "Gareth Bestor" <bestorga@us.ibm.com> wrote in message news:H4E4uq.JvL@lugnet.com... (...) in (...) eyeing (...) receiver (...) reveiver (...) I've also followed this intresting thread. And now I'm wondering why Lego have used the infrared (...) (22 years ago, 22-Oct-02, to lugnet.robotics)
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frequency
(score: 1.981)
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| | Re: Controling LEGO trains via Decta Control Lab
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| 10Hz is nowhere near fast enough to control a train motor using PWM (pulse width modulation). You need at least 100Hz, and higher would be better. Any of your suggestions will vary the speed of a motor, but the most common is varying the duty cycle. (...) (26 years ago, 29-Oct-98, to lugnet.robotics)
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frequency
(score: 1.981)
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| | legOS 0.2.2 dsound_play ?
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| hello again, has anybody got anything else than noise from legOS 0.2.2 dsound_play ? i'm able to compile and dll this little application: #include <dsound.h> #include "sample.h" int main(int argc, char *argv[]) { dsound_play(sample,s...(sample)); (...) (25 years ago, 25-Nov-99, to lugnet.robotics.rcx.legos)
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frequency
(score: 1.981)
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| | RE: About the elsema FMTR 2705
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| Michael, I have tried to use the Elsema radios without the modem chips but because 27Mhz is such a noisy frequency (at least here in Australia) I found that I got way to much interference when interfacing directly to TTL. The modem chips are really (...) (26 years ago, 8-Oct-98, to lugnet.robotics.handyboard)
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frequency
(score: 1.981)
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| | Re: RCX IR link question
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| (...) The RCX generates a modulation signal with a period of 26 us. That would seem to make the modulation frequency around 38.5 kHz. I would assume the tower uses something similar. -Kekoa (24 years ago, 9-May-00, to lugnet.robotics)
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frequency
(score: 1.981)
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| | Re: What every lego town is missing....
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| (...) Eric, I'm supprised with you! Arn't you from New England! Substitute Starbuck's with Dunkin Donuts and doublt the frequency if you want a more local flavor! Eric Kingsley The New England LEGO Users Group (URL) (24 years ago, 24-Jan-01, to lugnet.town)
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frequency
(score: 1.981)
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| | RE: Custom Firmware, IR Problems, and Dead RCXs
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| (...) <snip> (...) <snipped more> Well, no. The RCX receiver is a standard IR unit tuned to the carrier frequency. when I look a the signal on my scope, I get a nice square-shaped wave that is the same as the data byte (with start and stop bits) (...) (23 years ago, 29-May-01, to lugnet.robotics)
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frequency
(score: 1.981)
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| | Re: Range of RCX sound production
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| Hi Brian, I examined the RCX ROM sound routine, and it provides a lower bound of frequency 31 (matches what your ears told you), and an upper bound of 20000 (also as you noticed). I'm not sure about the sound hardware, but you might be able higher (...) (20 years ago, 18-Aug-04, to lugnet.robotics)
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frequency
(score: 1.981)
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frequency
(score: 1.981)
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| | IC 3.x Reg Code
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| Does anyone have a temp 3 week reg code for IC 3.x that I could use?? Im having problems loading the frequency measuring routinues provided on this mailing list and I believe it might be because I'm still using IC 2.8 and the routines have been (...) (27 years ago, 17-Feb-98, to lugnet.robotics.handyboard)
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frequency
(score: 1.981)
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| | Talking robot
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| Has anyone toyed with the idea of having your robot talk? I've thought about trying to convert a wave file from pulse code modulation to frequency modulation and try to get it to play on the RCX but I don't think that there will be enough resolution (...) (26 years ago, 30-Jan-99, to lugnet.robotics)
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frequency
(score: 1.981)
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| | I am officially curious...
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| Hey Y'all: What has happened to Lugnet? Where is everyone? I don't pay attention to the stats, but I think that frequency of posting must be at an all time low. Am I wrong about this? The place is as quiet as a morgue. I keep bumping into some of (...) (23 years ago, 8-Dec-01, to lugnet.general)
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frequency
(score: 1.981)
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| | RCX and batteries
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| Is the RCX considered a "high-drain" or "moderate-drain" device? If one is using the motors, I'd almost say yes, but how does frequency of use factor into this? Is anyone using rechargeable NiMH batteries in their RCX? What kind of performance to (...) (22 years ago, 24-Nov-02, to lugnet.robotics)
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frequency
(score: 1.981)
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| | Re: sensors, actuators, and software, oh my!
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| (...) Beta particles are electrons, alphas are helium nuclei. Neither is electromagnetic - they are actual particles with mass, whereas photons have no or nearly no mass. Gamma rays, however, are high-energy enough to see gamma-ray photons as (...) (21 years ago, 14-Apr-03, to lugnet.robotics)
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frequency
(score: 1.981)
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| | Re: IR to PC
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| (...) It is my understanding that IrDA and the RCX use totally different carrier frequencies for the IR ports, and thus are incompatible at a much more basic hardware level. This has been discussed in great detail in the past, so I recommend (...) (25 years ago, 1-Sep-99, to lugnet.robotics)
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frequency
(score: 1.981)
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