 | | RE: Linx technologies RF modem
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Dave, I'm looking seriously at the Linx HP eval kit. Please let me know how yours works out, and any tips on installation to the handy board would be greatly appreciated. Also, what if I wanted to put HP RX/TX on two robots plus host computer, I (...) (26 years ago, 20-Feb-99, to lugnet.robotics.handyboard)
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| | Unsubscribe!
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Please unsubscribe me from this mailing list. Thank You! (26 years ago, 20-Feb-99, to lugnet.robotics.handyboard)
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| | Re: msleep function in ICC11?
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You can't use the one in the library I wrote? (its available on the iccll web site) Basically msleep spin locks on the timer waiting for systicks to increment the appropriate number of milliseconds. If you aren't using my code you can do the same (...) (26 years ago, 20-Feb-99, to lugnet.robotics.handyboard)
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| | msleep function in ICC11?
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I have a HB w/exp brd and a PortMaster (a stock board with a 68HC11E1, 68HC24 port expansion and 32k ram). I'm programming the HB with IC3.2 and the PortMaster with ICC11v5. I am hung up trying write a funtion similar to the HandyBoard 'msleep' (...) (26 years ago, 20-Feb-99, to lugnet.robotics.handyboard)
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| | RE: Linx technologies RF modem
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I managed to speak with one of Linx's applications engineers- He said that a couple of the guys over there are using the Linx modules to communicate with HC11's, so interfacing the kit with the handyboard shouldn't be much of a problem. He said I (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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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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| | Re: Type conversion.
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FEDERICO SANTELLO wrote: <snip> (...) Federico - - Try doing it this way: (it's called a "cast") int temp; float dtemp; temp = 5; dtemp = (float)temp*3.5; printf("dtemp=%f\n",dtemp); Enjoy, - - - Nick - - - (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | Re: color sensors
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I believe that you will find that most photo transistors are sensitive to a very narrow range of frequencies, mostly in the IR range. OTOH a photo resistor is sensitive to a much wider range of frequencies and may be usable with a (colour) filter. (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | Type conversion.
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Hi to all. I'm not very practice with IC. My answere are , how can i convert a integer number to a floating point number? I want to make a moltiplication between an intger number and a floating. I make this: int temp; float dtemp; dtemp=temp*3.5; (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | Polaroid Sensors
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I just finished wiring up the HB for dual sonar sensors... A couple of problems... The first and most important is the fact that the values returned look to be completely random and often flipping between positive and negative values... Could this (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | Re: IR Sensors
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James - - Here's a link to the QRB1114 data sheet: (URL) limited playing has shown two things: one - the sensor is very sensitive to visible light and therefore needs to be used with an auto-calibrate routine. two - you have to be very selective in (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | Re: IR Sensors
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James - - Here's a link to the QRB1114 data sheet: (URL) limited playing has shown two things: one - the sensor is very sensitive to visible light and therefore needs to be used with an auto-calibrate routine. two - you have to be very selective in (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | SPI .vs. I2C and Documentation
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Hi all, I've been looking for some way to connect multiple devices (Handyboards, other 68HC11's, PIC's, custom devices, & PC's). From what I can find, I2C is the Phillips protocol which is well documented and supported. (Docs, Specilaized chips, (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | rc cars and HB- simple questions
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Hello. I've seen several discussions abot RC cars here, and I have two questions trying to verify my findings. Has anyone ever dealt with Radio Shack rc cars? I bought the one that can move back and forth on tracks and also sideways on wheels. So (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | Re: IR Sensors
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James What you see as black and what is black to IR may be different. I did some experiments for a line following race, and found that some black markers actually made the paper reflect IR better than plain white paper. The conclusion of my (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | Re: color sensors
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I wonder whether there are some phototransistors out there that have peak sensitivity to a small range of the visible spectrum. Preferably to "one color". Can anyone fill in here? ---...--- ericson mar Robotics Consultant mar@cooper.edu (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | Re: MC68HC11A1FN
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Your message said: (...) Jon, I had the same question a while back and was overwhelmed with the number of handy board enthusiasts who clued me into BG Micro. I checked their website, searched for MC68HC11A1FN and sure enough! --there it is for less (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | Re: MC68HC11A1FN
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Are you sure about that! I just checked B.G. Micro today and they have it in stock Part# ICS68HC11A1 $6.95 ea. Try again go to shop online and enter 68HC11A1FN in the search field. -----Original Message----- From: Jon Ryan Schuck (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | Re: MC68HC11A1FN
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BG Micro DOES sell it, I just checked with them last week, and plan on purchasing a couple myself this coming week. They sell it for less than 7 dollars a piece! Good luck. -- /---...---\ Eric Smiley Duke University Delta Kappa Epsilon House 1C1 rm. (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | Re: color sensors
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(...) What about putting different color filters in front of a photo transister, like you would on a camera. You could then enhance certain colors by filtering out the others. You may have to deal with some reduction in sensitivity but it may be (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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