 | | 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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