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| Maybe somebody could help. I am try to use the IR output. the problem is that the HB is modulating the signal at 41kHz and I need to get it down to 38kHz. I have checked the resistor and capacitor used in generating the frequency. R = 3.81 K C = (...) (25 years ago, 12-Feb-00, to lugnet.robotics.handyboard)
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frequency
(score: 1.981)
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| | Can I use two cybermasters
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| Hello, The price for cybermaster is lowered to about 50 $ here in Denmark so I am thinking of bying a 2nd one. Can I use two CM in the same room or do they all use the same frequency? Lars Gertsen - Denmark (24 years ago, 25-Sep-00, to lugnet.robotics.cybermaster)
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frequency
(score: 1.981)
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| | Re: Rolling Blackouts
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| (...) there's an interesting project being run by PETA looking at these very issues ( (URL) ). I first looked at the site last year and found it pretty interesting. Probabaly the only thing PETA has ever done that I almost like. (...) Larry, I think (...) (23 years ago, 4-Jun-01, to lugnet.off-topic.debate)
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frequency
(score: 1.981)
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| | re: ztx614
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| If I have interpreted the schematics correctly almost any npn can be used for the ztx614. The 614 simply provides ground for the IR transmitter with a collector current of about 3ma. The base current is set by the 10k R to about (5/10k) 0.5ma. If I (...) (28 years ago, 17-Mar-97, to lugnet.robotics.handyboard)
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frequency
(score: 1.981)
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| | Re: Relativity Question
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| (...) However, some are moving in a certain way as to make it indistuigishable as to who is moving. i.e. me moving away from the universe is equivalent to universe moving away from me. (...) The equations are equivalent no matter what inertia frame (...) (24 years ago, 8-Nov-00, to lugnet.off-topic.geek)
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frequency
(score: 1.981)
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| | Re: Princess Mononoke/San -- LEGO sculpture
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| (...) I'm starting to think this "Eric Harshbarger" character is a figment of our collective imagination. Do we have any independent verification that he exists? More accurately, I confess, I'm simply unwilling to admit that he's churning out these (...) (24 years ago, 20-Nov-00, to lugnet.build)
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frequency
(score: 1.981)
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frequency
(score: 1.981)
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| | RCX NXT Possible Improvements over older RCXs
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| I've seen mention of improvements to the light sensor and also the change from analogue to digital interfacing. I think an improvement to the light sensor, by making it pulse the LED at a frequency that can be filtered - a lot higher than 50 or 60Hz (...) (19 years ago, 13-Jan-06, to lugnet.robotics)
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frequency
(score: 1.981)
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| | Re: Smooth power or PWM for Lego train motors?
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| (...) Being British I'm not too familiar with American trains (yet), Though I know about the multiple engines in real life. I would intend to triple head trains in a similar way when I have made enough American engines! The motor duty limitation is (...) (21 years ago, 4-Sep-03, to lugnet.trains)
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frequency
(score: 1.981)
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| | Re: IR (formally 6.8nF cap)
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| there's not really a big diff in the performance of the ir sensors given 38 or 40 khz. so either is fine, +/- a few khz just doesn't really matter, you have to detune 10 khz or so for it to matter. there is an issue whereby there are two different (...) (24 years ago, 13-Jul-00, to lugnet.robotics.handyboard)
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frequency
(score: 1.981)
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(score: 1.981)
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(score: 1.981)
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| | Re: Communication with PC (2)
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| REF: TCP/IP & the HandyBoard Hello Mr. Chuck, Thanks for the feedback and sorry for the delay of my own feedback. I inquired about the TCP/IP alternative because we have acquired two Nomadic Technologies Mercury RF TCP/IP modems. They are (...) (27 years ago, 30-Jun-97, to lugnet.robotics.handyboard)
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frequency
(score: 1.981)
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frequency
(score: 1.981)
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| | HB Simple Encoder Routines
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| Hey everyone, My partner and I are trying to use the sencdr?.icb and fencdr?.icb routines to keep position measurements of a robotic arm. The encoders are break beam and provide a signal of 4kHz max. We used 4 J-K flip flops to reduce this frequency (...) (27 years ago, 13-Apr-97, to lugnet.robotics.handyboard)
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frequency
(score: 1.981)
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| | Re: Polling sensor values with wait_event
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| Thomas, I had a thought about this situation. You could write a function that sets a flag when the event is triggered, do nothing otherwise. You could call this function from within each of the tasks you write (at a somewhat high frequency ... say (...) (22 years ago, 28-Nov-02, to lugnet.robotics.rcx.legos)
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frequency
(score: 1.981)
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| | Re: Type conversion.
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| (...) Hi, what you want to do is called type casting,ie. you must explicitly specify the type. I've included some sample code that uses it. Because the beeper function expects a float but the knob function returns an integer, you have to modify the (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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(score: 1.981)
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(score: 1.981)
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| | Love the new Music capability with the new firmware!
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| I don't know if people have discussed this already or not, but I'm just playing around with the new firmware now and I can finally do what I have wanted to do for 3 years, and that is to make the frequency played by the RCX be a function of a (...) (23 years ago, 24-Aug-01, to lugnet.robotics)
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frequency
(score: 1.981)
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| | Re: We'll just wave...
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| (...) I'll take the bait. When we are forever secure from the possibility of tyranny, I'd be happy to see the Second Amendment repealed.[1] Til then, these tragedies are the price we pay. We should do everything we can to reduce the scope and (...) (12 years ago, 18-Dec-12, to lugnet.off-topic.debate)
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frequency
(score: 1.981)
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