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 | | Re: R4 Resistor
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| where is this list that says 2.94K? please tell me so i can eradicate the incorrect value. to answer, yes, just use it, it affects the IR xmit frequency and nothing else. fred In your message you said: (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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frequency
(score: 1.981)
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| | Re: Suggestions - Possible ESSEX Fest?
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| On Sun, 12 Mar 2000, Jason Briscoe (<000401bf8df9$45d7b...1883e@pbnc omputer>) wrote at 22:17:50 (...) If everyone's happy with the three month frequency, how about late Nov / early Dec? If volunteers are required, this gives them plenty of (...) (25 years ago, 14-Mar-00, to lugnet.loc.uk)
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frequency
(score: 1.981)
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| | Re: Controlling a DC motor 3
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| (...) Within limits, the rate doesn't matter much. What matters is the ratio of off time to on time (i.e., the duty cycle). Probably, you could change the frequency by an order of magnitude either way and get about the same results. --Will , , __@_/ (...) (26 years ago, 4-May-98, to lugnet.robotics.handyboard)
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(score: 1.981)
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| | General IR question
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| In general, what's the difference between the IR "signal" that the tower and RCX use to communicate and the IR energy used in thermal imaging? Is it just a matter of frequency? If the RCX was pointed at an IR camera, what what would it see? -- Dan (...) (22 years ago, 13-May-02, to lugnet.robotics)
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frequency
(score: 1.981)
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| | Re: Detemining Bad Vertex Sequence
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| (...) Yes - "Poll, silent update" - that's the option - it refreshes for me (400Mhz Celeron) every one to two seconds. Not sure if you can control the poll frequency, though. Lars, can you answer this? Chris (22 years ago, 13-Sep-02, to lugnet.cad.dev)
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frequency
(score: 1.981)
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| | Re: Anybody else crack the Mars DVD code?
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| (...) I've got to find the time to do this. It's a neat code (& a great way to teach kids about cryptography). Just downloaded a letter frequency table, so maybe I'll hit it again... (...) And while they've not yet "released" the image of the (...) (21 years ago, 28-Jan-04, to lugnet.general, lugnet.space)
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(score: 1.981)
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| | Re: What in the...
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| (...) Wow. Second. Hmmm.... *cough* ++Lar *cough* Rat no good fer nothin'... Eh, he tires of being first ;) Maybe this year (though extremely doubtful--is Feb. and my posting frequency is way down, and I have no Hoppy to banter with in o-t.d :( ) (...) (21 years ago, 19-Feb-04, to lugnet.org.ca.rtltoronto)
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frequency
(score: 1.981)
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| | Re: IR scanner
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| In reply to: (...) believe (...) A couple of quick points here: Your value of 96,720,000 ft/s, while accurate and sounds extreme should be considered in it's proper context. For the light to travel 1 foot, the object must be 6 inches away (6in there (...) (25 years ago, 1-Dec-99, to lugnet.robotics)
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frequency
(score: 1.981)
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| | Re: RCX to PDA (Answers, please :-)
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| If you can find software on the net that allows you to use your Ipak as a remote control, then I'm sure it can be converted for the RCX. I don't believe you will. I also don't know much about Pocket PC 2002. Anyone? ----- Original Message ----- (...) (22 years ago, 16-Jul-02, to lugnet.robotics)
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(score: 1.981)
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(score: 1.981)
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| | Re: IR port
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| see the v1.21 parts list in the hardware section, for the following info: re: R4's value. Depending on the variety of the manufacture of the HC132 chip, R4 should be either 3.83K (Digikey 3.83KXBK-ND) or 6.81K (Digikey 6.81KXBK-ND). To test this, (...) (23 years ago, 11-Nov-01, to lugnet.robotics.handyboard)
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(score: 1.981)
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(score: 1.981)
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| | System time &square waves
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| I am still having trouble with the my program and thought that I might ask whether there is any code or does anyone know of a way to identify the frequency of digital square waves with the handy board. Joe Martin joema@mpx.com.au (28 years ago, 24-Mar-97, to lugnet.robotics.handyboard)
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frequency
(score: 1.981)
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| | Re: Nice article in the Kansas City Star
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| Cool! Wish I got the paper on the weekdays. But since I moved from OP over to Lawrence I"ve not gotten it with any frequency and decided to can the KC star and get the Lawrence paper. Very neat, can't wait to see the picture. Tom Boucher Lawrence, (...) (25 years ago, 24-Nov-99, to lugnet.loc.us.mo.kan)
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frequency
(score: 1.981)
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| | Re: January meeting?
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| (...) Why did you switch to wednesday dates, Kevin? Not that I have anything against a midweek meeting, of course. Perhaps you were just trying to get us "tuned" to your birthday frequency? ;-o I'm game for any of these dates, including the upcoming (...) (24 years ago, 10-Jan-01, to lugnet.org.ca.vlc)
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(score: 1.981)
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(score: 1.981)
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| | Re: IR Collision avoidance
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| Well, at risk of being branded a heretic, since you've brought up the issue of modulated IR, I'm going to throw out an observation I've made about the Radio Shack IR sensors which several other people on the mailing list have privately disagreed (...) (28 years ago, 3-Mar-97, to lugnet.robotics.handyboard)
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frequency
(score: 1.981)
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| | Re: IR scanner
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| (...) Um. Your frequencies are out somewhere... There is a factor of ten 'slip' in the figures being used here. In fact your oscillator needs to be at ten times this frequency for a 1ft/Hz measurement. (the figure in the first line should be (...) (25 years ago, 1-Dec-99, to lugnet.robotics)
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(score: 1.981)
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(score: 1.981)
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| | Re: Ultrasonic sensor interactions
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| (...) I'm not sure yet; I admit to not being even remotely a "hardware guy", which is why I keep doing all this SW testing :-). (...) Another odd feature is that the ping frequency seems to change with both what you define the sensor as well as (...) (18 years ago, 22-May-06, to lugnet.robotics)
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(score: 1.981)
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