 | | 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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| | IR Sensors
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Hi everyone, I've hooked up the QRB1114 infrared sensors to the analog input ports. Although they appear to be operating, their values make little sense. Whether a black or white object is placed in front of the sensor, the Handyboard reads in a low (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Servos and solenoids
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I won't attempt to power your servos with 9v. Those servos are designed to work off a 4.8v battery pack, you'll most likely smoke'm. Wayne -----Original Message----- From: J.W. Pennington <jwp@awod.com> To: handyboard@media.mit.edu (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | Servos and solenoids
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First, The Handyboard's motor output is 9 volts, does anyone know if Futaba's small servos handle this well? I have two S3003 servos that I'd like to use. Second, Has anyone run a solenoid from a motor output? I'm assuming that it would do fine, PWM (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | MC68HC11A1FN
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Does anyone know a good place to purchase the MC68HC11A1FN chip? I haven't found a single place. Motorola doesn't seem to sell them... neither does BG MICRO. Jon (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | Re: IR Sensors
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(...) Many optically black materials do not at all affect the IR range of the spectrum. It is possible that your black object is not black (read "absorbant") to IR and simply reflects it just like the white. Try several different materials. Many may (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | Re: parallel port access
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has anyone tried to access the parallel port with visual basic? chen (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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| | Re: RF VIDEO?
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I recall seeing a Video transmitter "Video sender" at Biway a while back actually i own one. It transmittes on the UHF and the picture quality is quite good. It's the size a colts package just twice the height, and only $20 Canadian. It has a audio (...) (26 years ago, 18-Feb-99, to lugnet.robotics.handyboard)
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| | Expansion board
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I´ve some troubles with my expansion board kit. All work fine but: 1. when the motor 0 is set to go back (for example: motor(0,-50)) signal is too low (-0,1 v) red led no lite. 2. I´ve connected a polaroid range module and run sonar.c functions. The (...) (26 years ago, 18-Feb-99, to lugnet.robotics.handyboard)
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| | please remove me from mailing list
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please remove me from your mailing list it was a lot of help on my robot thanks wayne diamondw@kennecott.com (26 years ago, 18-Feb-99, to lugnet.robotics.handyboard)
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| | Interrupt Question
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I'm trying to implement a hardware shaft encoder routine similar to the the one described in the Mobile Robots Book for my Handy Board. I'm using the pulse acumulator for the left encoder and TIC2 for the right shaft encoder. They are both (...) (26 years ago, 18-Feb-99, to lugnet.robotics.handyboard)
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| | Interrupt routine question
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I'm trying to implement a hardware shaft encoder routine similar to the the one described in the Mobile Robots Book for my Handy Board. I'm using the pulse acumulator for the left encoder and TIC2 for the right shaft encoder. They are both (...) (26 years ago, 18-Feb-99, to lugnet.robotics.handyboard)
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| | Unsuscribe
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I would like to unsuscribe from the mailing list. Thank you (26 years ago, 18-Feb-99, to lugnet.robotics.handyboard)
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| | Re: IR ranging unit GP2D02
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Hallo Thomas, ja ja, der GP2D02 ist ein feines Ding. Gute Infos und ein Interface findes Du (URL) Spass Bernd Klein P.S. Was baust Du denn zur Zeit ? Ich beschäftige mich mit SUMO-Roboter. Derzeit baue ich einen 1000g Sumo mit Synchronantrieb. Mit (...) (26 years ago, 18-Feb-99, to lugnet.robotics.handyboard)
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| | Re: RF VIDEO?
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Check out these cameras/transmitters: (6 URLs) thing is, they all tune into channel 59 on any television, or video capture card on a PC (even a laptop with PC Card). -- Doug (26 years ago, 18-Feb-99, to lugnet.robotics.handyboard)
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| | Linx Technologies RF Modem
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I purchased the Linx Technologies HP development kit a few months ago, and I couldn't get the PC to communicate with the Handyboard. After swapping the modules around a bit, I found that one of the Receiver modules was not working. I contacted Linx, (...) (26 years ago, 18-Feb-99, to lugnet.robotics.handyboard)
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| | RE: Sonar and RF Modem questions
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(...) and (...) agreement (...) That would be cool. I was looking very closely at the RM and HP series because a few months ago we were investigating data acquisition by telemetry. That project is presently on a back burner, but we may still do it (...) (26 years ago, 17-Feb-99, to lugnet.robotics.handyboard)
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| | Re: RF VIDEO?
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my team used a wireless audio/video transceiver we got from radio shack. it connects to the camera and the transceiver can transmit the images to monitor. (26 years ago, 17-Feb-99, to lugnet.robotics.handyboard)
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| | Re: HB to control a TV set and VCR
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(...) Sure, the IR routines at (URL) can do that for you. Just follow the instructions in the readme to find the configurations values for your TV and for your VCR separately, and then in your program switch back and forth between the configurations (...) (26 years ago, 17-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Sonar and RF Modem questions
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(...) <snip> (...) I just took a look at the Linx site, and while perusing the fine print at the end of the price list came across this: "Linx requires the purchase of an evaluation kit prior to the sale of individual modules to any customer. This (...) (26 years ago, 17-Feb-99, to lugnet.robotics.handyboard)
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| | RF VIDEO?
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Does anybody out ther have RF wirless video on there 'BOT I want to construct a wirless video transmitter that will send a signal to a near by monitor or computer.. but not the high powered ones that require a FCC license. any suggestions would be (...) (26 years ago, 17-Feb-99, to lugnet.robotics.handyboard)
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| | IR ranging unit GP2D02
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Hi, I got a SHARP "GP2D02". It is a optical ranging module for a range from 10 to 80cm (4" to 32") with a resolution of 8 bit; non-linear ( the near feeld resolution is better ). While it looks like a perfect robot-eye, it looks quit difficould to (...) (26 years ago, 17-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Sonar and RF Modem questions
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I've used this code to drive a remote serial 4x20 LCD module: (URL) this helps, - - - Nick - - - (...) (26 years ago, 17-Feb-99, to lugnet.robotics.handyboard)
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| | Pic and 68hc11board
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Did anyone before used PIC with "a" 68hc11 board, to realize a driver or a peripheral device ? Maybe the handyboard does not need it, but other boards like mine...a little different. Thanks for any suggestsions. (26 years ago, 17-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Sonar and RF Modem questions
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(...) <snip> (...) standard battery source ... but since I was soldering on the Polaroid board anyway, I decided that it wouldn't hurt to add it. Do be *sure* to add the 0.1 uF cap at C7 as per: (URL) (...) Since most of my constructions are LEGO (...) (26 years ago, 17-Feb-99, to lugnet.robotics.handyboard)
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| | Re: HB to control a TV set and VCR
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Why not just buy a universal remote control (make sure it works for your TV and VCR of course). Then, take off the faceplate and interface those 3 switches to the outputs?? Saves the hassle of writing a driver for the I/R port.... --phil (...) (26 years ago, 17-Feb-99, to lugnet.robotics.handyboard)
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