 | | Problems with microprocesseurs
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Hello, I work with a Handy Board and an other board based on 68hc11E2. The first is master and the second is slave. The SPI communication is OK between 2 boards. The first send the position of servos to the second. At the start, all is OK. After 2 (...) (24 years ago, 13-Sep-00, to lugnet.robotics.handyboard)
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| | Re: Rover based on Hanyboard is evolving well!
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Hi You can only run the counter 4x slower as now. But in this case, the complete HB works 4x times slower, so this isn't a usefull solution. The other possibility is the use the overflow flag and integers. I didn't solve that problem. For more (...) (24 years ago, 13-Sep-00, to lugnet.robotics.handyboard)
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| | Rover based on Hanyboard is evolving well!
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Hi, I managed to build up a pan & tilt platform for my rover out of Servos, I hot glued them together and built a mount for my ultrasonic transducer out of perfboard. Also you need to make a baffle for the rear of the transducer or you do get (...) (24 years ago, 13-Sep-00, to lugnet.robotics.handyboard)
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| | RE: Here's the Rover with handyboard
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Please let us out of your list. ---...--- Click here for Free Video!! (URL) Original Message ----- From: T. Gathright <terrygathright@home.com> To: Jerry Normandin <jerrynormandin@ne.m...aone.net>; <handyboard@media.mit.edu> Sent: Monday, September (...) (24 years ago, 12-Sep-00, to lugnet.robotics.handyboard)
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| | Peekword returns an int... can I typecast in Interactive C?
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Hello, my problem is that peekword returns an int. I need a long. Is there a way around this in Interactive C??? (24 years ago, 12-Sep-00, to lugnet.robotics.handyboard)
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| | Interactive C question can you cast an int to a long?
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Hi, I have an interactive C question, I'd like to return this: return peekword(0x1014) - start_time; as a long.. since this is why there's a distance limit in the sonar.c code. Can I return this as a long? (24 years ago, 12-Sep-00, to lugnet.robotics.handyboard)
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| | possibly the way the driver is written limiting sonar range?
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Hi, I was playing with my handyboard's sonar.. The distance limitation is in the code, since we are using integers we are limited to -32,778 to 32,768.. and that's why I am at @15 ft limit. After we change the sonar code to longs the problem is (...) (24 years ago, 12-Sep-00, to lugnet.robotics.handyboard)
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| | Here's the code I wrote so far, any ideas why my Polaroid 6500 has only 15ft range?
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Hi everyone, Here's some code that I have so far. I have no clue why I only get 15' range out of my Polaroid 6500. I did not get the usual fastener that clasps the tranducer into place, could that do it? My tansducer is mounted on "sensor array" (...) (24 years ago, 12-Sep-00, to lugnet.robotics.handyboard)
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| | Polaroid 6500 ranging.. only getting 15ft range!
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Hi, How do you get 35ft range out of the handyboard? I get a negetive number when hitting an object over 15ft away! Does anyone else have this problem? Can I adjust it somehow? Thanks! (24 years ago, 12-Sep-00, to lugnet.robotics.handyboard)
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| | handy board
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Hello, I am in need of some assistance please. I am trying to have a portable omni view digital camera take compressed mjpeg images and send them over a modem connection. To do this I believe I would need a handy board. Another characteristic of it (...) (24 years ago, 12-Sep-00, to lugnet.robotics.handyboard)
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| | TI-92
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Have anybody link a TI-92 (Texas Instruments Calculator). Because I fail on my first try. And only got a cero value form the TI-92. Any Help? Thanks Daniel R (24 years ago, 11-Sep-00, to lugnet.robotics.handyboard)
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| | IR Reception
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I posted this question previously but got no reply so I am trying again. I have mounted the IS1U60 infrared demodulator on to the HB but I have realised that it can only recieve from a particular direction. Is it possible to mount another IS1U60 by (...) (24 years ago, 11-Sep-00, to lugnet.robotics.handyboard)
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| | Re: Encoders
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IC can't sample the A/D converters that quickly. As long as you're generating a nice squarewave you could connect it to one of the input capture pins and write a custom interrupt routine to maintain the count. --Chuck (...) (24 years ago, 10-Sep-00, to lugnet.robotics.handyboard)
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| | Encoders
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Since some are on the subject of encoders, I have a problem I would like to get help on. I have a hall effect sensor dutifully counting pulses on a gear. The gear will rotate from 800-4000 RPM. I am running the signal through a 741 OP Amp to (...) (24 years ago, 10-Sep-00, to lugnet.robotics.handyboard)
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| | Re: Encoders, what are you using?
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Jerry, go to: EE 401 - Electrical Engineering Design Course - 1999/2000 then to shaft encoders they have 16, 32, or 64 sections you can print out. bye, Terry G. ----- Original Message ----- From: "Jerry Normandin" <jerrynormandin@ne.m...iaone.net> (...) (24 years ago, 10-Sep-00, to lugnet.robotics.handyboard)
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| | I fixed my slop!
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Hey.. I added a quick reverse drive to the moter.. it turns out my slop was the drive system coasting! I added brake and I am more accurate now!!!!!!! (24 years ago, 10-Sep-00, to lugnet.robotics.handyboard)
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| | Encoders, what are you using?
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Hi, My homebrew quad hall effect encoder works, I'm learning from it. I get @ 1/4" resolution so there's plenty of slop. I can have the robot pace back and forth on a straight track for 6 passes or so then I start to veer off track. So I guess it's (...) (24 years ago, 10-Sep-00, to lugnet.robotics.handyboard)
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| | Robot Program for Rover so far...
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Hi everyone. Well I decided to go with a Quad Hall Effect encoder. I mounted 4 very small magnets on my 1" plastic drive gears and used the Hall Effect switch that Fred recommended. Here's the code I have and the results! For a 180 degree turn I get (...) (24 years ago, 10-Sep-00, to lugnet.robotics.handyboard)
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| | Re: Sensor supply voltage & PC communication
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hi. you can certainly tap the 9.6v batt output to power the sensor (use J13), but make *sure* that the sensor does not put out more than 5v, or you'll blow your analog inputs. if you're not sure, put a 1K resistor in series with the sensor's output (...) (24 years ago, 10-Sep-00, to lugnet.robotics.handyboard)
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| | External Motor Power
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I have read the FAQ on cutting the trace that supplies motor power from the Handyboard battery so you can use another power source but it doesn't address the issue of what to do if you have an expansion board. I am sure someone must have done this (...) (24 years ago, 10-Sep-00, to lugnet.robotics.handyboard)
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