 | | Re: SONARS GALORE!!!
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HI Adam, Please post your schematic as you mentioned. I am interrested. Thank you, -Pandit ---...--- (...) (28 years ago, 22-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Re:system time
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Hi Joe, I am glad that you get it going. For casting, you can cast variables as well. Again, it is best to avoid any type casting if you can. I would not encurage any one to do much of casting if not necessary. Some programing language makes this (...) (28 years ago, 22-Mar-97, to lugnet.robotics.handyboard)
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| | Some answers on Re: Sonar and the handyboard
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Adam and Tom have been exchanging quite a bit of mail on the topic of Ultrasonics and the Handyboard. A lot of good information has come to light as well as some misinformation. I've spent some time figuring out just what is what, and this is the (...) (28 years ago, 22-Mar-97, to lugnet.robotics.handyboard)
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| | Re:system time
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Pandit, Thanks a lot for your help.I had already thought that it could be the board running out of resources that caused the problem but I am not very experienced with programing.I agree with your improvements on the program and will implement them (...) (28 years ago, 22-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Runtime Error 3
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Hi Peter, Well let me give it a shot, without actually downloading it to the Handy Board. It should go something like this: /* GLOBALS */ int num_sensors = /*put the number of analog sensor inputs you want*/ void main() { int sensors[num_sensors]; (...) (28 years ago, 22-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Tom, I put the cap in too - never noticed much defference. It must just be for some minimal filtering of noise. I don't know how well you know Ben, but it sounds as though you will probably be fixing this one solo, eh? Do you have manuals? I'll look (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | Runtime Error 3
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I'm kind of new to IC and I don't know how to deal with all the errors yet. I wrote a simple code to record sensor inputs every 15 minutes. This is the code I wrote: void main() { while(1) { int x[]; int s=analog(0); int f=0; s=x[f]; sleep(900.0); (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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(...) I wouldn't think so. I am looking in Kents documentation, and sure enough, there is something about putting a resistor on BINH. Also something about putting a cap in C7 on the ranging board. I'll play with things tonight. (...) Good thinking (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Tom, You mentioned that the INIT has the 330ohm. I'm pretty sure it's the BINH and NOT the INIT that should have the 330ohm. Reread Kents documentation. I don't think you would have damaged the unit in this short of time. Like I've mentioned on many (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Ahh... This sounds right from when I had the same problem. I just forgot about the disconnecting of the BINH. Mainly because it was accidental at the time. Anyways, the point I wish to make is that you have a bad ranging unit. This symptom is (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Thanks, I followed Chuck M's advice, and disconnected the BINH, and the thing words, with 23" as the minimum distance. (...) I would have to possibly agree. I noticed in your earlier mail you have suggested putting a 330 ohm resistor between INIT (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | SONARS GALORE!!!
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For those who are interested..... I have recently developed a way of signalling 4 sonars from the HB using a logical switching circuit controlled by one ranging board and another board developed to switch which transducer is being signalled by the (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Tom, I purchased 2 OEM kits (4 ranging units w/transducers) From this I had 3 bad ranging units. You'll notice a socketed chip on the PCB. I would suspect that this chip is suspect to failure. Anyways, in order to solve your problem, I would suggest (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | Interactive C Sample Source
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Is there any sample source avail on the web/ftp of IC routines. Like generic routines for object avoidance, navigation, light following, sound following stuff like that. (...) ___...___ Victor Clark Xerox Document & Data Services Xerox Corporation (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | Re: New motor drivers
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Yes. I use 12 V motors with these chips. The 1A ones. ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the Advancement of Science (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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mine is doing the same thing only it displays 7" i hear ticking constantly HELP bryan wiabel offrds2@aol.com (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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(...) The one that is mounted is in a plastic box, glued in with silicon glue. The unmounted one was laying on my bench pointed at the ceiling. (...) I assume the 'blank inhibit' pin is BINH (docs are at home, I am at work), and that is connected to (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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(...) Since 8" is the 'minimum' distance the board can see, I strongly suspect that your transducer isn't sufficiently damped. This will cause it to continue 'ringing' after the pulse is sent and when the receiver switches on, its still vibrating so (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | IR for bots
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Hello everyone, My thinking (albeit limited), has been that simply driving an IR LED with ac (ie:40Khz) as opposed to static dc, is enough to discriminate it from other frequencies like 60 Hz. or whatever. Then, when the detector picks up sufficient (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: New motor drivers
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(...) The motors are 12 volt 1 amp motors. I know that the piggyback method will give me the higher current but I am not that fond of that method. I would prefer to have one controller that has power to spare than a rigged system that will just (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: New motor drivers
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(...) I am running 12 volt motors that draw about 1 amp each. They were the only motors that I had available for the project so I made due. Keith Keith Soldavin kas219@email.psu.edu (URL) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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(...) Yup. I have one of those tapeless tape measures with the smaller transducer, and the handyboard connected one is louder, so I wonder if that might be something? (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Tom, Are you hearing a ticking sound coming from the transducer? Let me know. (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Hi, with all this talk of sonar, I thought I finally get to hooking mine up. All I get is 8". If I unplug it, I get 0". I'd swear I have it hooked up right. Someone sent out a mail earlier this week, and I had mine hooked up just like it said. I (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | RE: Motorola Microprocessor source
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I got my 6811s from Allied Electorics - www.allied.avnet.com My LM052Ls came from Marshall - www.marshall.com For the Sharp IS1U60, I substituted the Sharp GP1U58Y. I got them from NovaSoft 1-804-272-5752 or 1-407-672-6780 Note that the pin (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: New motor drivers
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Keith, How much current do your motors require. The SN754410 offers 1A per channel. If your piggy back them you can increase this to 2A/channel. Let me know. (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: External power for motors
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Phil, Let me tell you that when someone made the same suggestion to me I hade to reconsider the demolition of my beautiful (expensive!) HB. My solution is this.... Simple take up pin 8 of the driver chip (SN754410) and wire it so that it may be (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Keith, On the ftp site under ???/contrib/kent/sonar there should be a file called sonartst.c This file tests the unit goven that you've included sonar.icb in the initial loading of library files. The file simply calls the ping(0) routine then waits (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: New motor drivers
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The 18200 requires 12V motors, is that what you have? I ask because they are fairly unusual in small bots. --Chuck (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | New motor drivers
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Does anyone know an easy way to replace the motor drivers on the handyboard with the 18200 chip from National Semiconductor? The motors I am going to be driving need more current that the old ones can put out so I need to upgrade. I know that they (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Motorola Microprocessor source
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Does anyone have a source for the following parts or suitable substitutes: Motorola 6811 microprocessor Hitachi 16x2 LCD Sharp IS1U60 infrared demodulator SGS-Thompson L293D motor driver William F. Conroy III conroyw@acm.org Lt Col, USAF (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Motorola Microprocessor source
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(...) Most Connor disk drives have a 68HC11A1FN on them. If you find someone throwing one away, it is a cheap HC11. (...) Digi-key sells these. (...) Ben Wirz sells these. Also look for the TI replacement possibly. (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | Hall Sensor
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Hi, Does anyone have recent model #'s, part #'s, or suppliers for Hall Effect magnetic sensors that interface directly with the Handy Board. There is a picture of a Hall sensor on page 52 of the Handy Board Technical Reference, but no part number or (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | Re: system time
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please get me off this mailing list (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | re: ztx614
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(...) I just looked back to the IR transmitter schematic... The 1K res + RED LED you see there is for the only purpose of having a visible feedback of IR transmission. The IR Led and it's limiting resistor (if the case) will be connected in series (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | re: ztx614
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On Wed, 19 Mar 1997, Stefano Nardone wrote (...) Thanks! that was not clear, where did you find info on j7? Is there a IR transmitter in the parts list? I didn't see one? Do you know what to use for a transmitter? thanks, jm (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | LCD compatible
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Does anyone have experience using a Truly MCC162A1-2 16x2 LCD? I bought one from Wirz electronics for the handyboard. In assembly step 6.something, it says to power it up and there should be *faint* segments lit, if they are dark check pin1 to (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | re: ztx614
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(...) How are you gonna get 100 ma through a 1k resistor biased by 5volts?? The max would be 5ma. I have *never* heard of a LED this size that can handle more than 20ma!! This LED is tiny. I don't know where pin one of the jumper goes to or its use (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | re: ztx614
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(...) I think it must better be a darlinghton and it must support enough current: if you want to get 0.1A or more pulsed current in the IR led, the transistor must have a rather high current gain, more than that of an ordinary npn trans (by the way (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | system time and casting
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Hej >joema@mpx.com.au wrote: >When I try to use the system time as part of an expression >in an if-else statement I get an error message while >trying to download to the board. Goes something like : >type <float> cannot be used in a conditional >Is (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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