 | | Re: To step or not to step
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Russell , Having that encoder will help you a lot. One of the biggest problems with using steppers is that they will stall when you get to higher speeds. What ever program you use to drive the steppers should have a part that asks "has it made the (...) (26 years ago, 7-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Science Interest
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Although not sure, I think that a wearable could perform better then a palm pilot for the firefighting task. Here are some pointers: [Georgia Tech] (URL) Lab] (4 URLs) [UoToronto] (URL) it helps, Ozan (26 years ago, 7-Nov-98, to lugnet.robotics.handyboard)
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| | Follow-up on DS1233 problem
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Hello, all: Just following-up on yesterday's message about the HB resetting during the initial download. Removing the DS1233 and replacing it with a reset switch produces a working configuration. There was also one stuck digital input, but swapping (...) (26 years ago, 7-Nov-98, to lugnet.robotics.handyboard)
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| | Re: nicad battery
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It might take a bit longer to charge but I don't see a problem I actually use a 12V 3AH gell cell to power my robot and Handy Board -----Original Message----- From: Pat Benoy <benoy@SLU.EDU> To: handyboard@media.mit.edu <handyboard@media.mit.edu> (...) (26 years ago, 6-Nov-98, to lugnet.robotics.handyboard)
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| | Re: To step or not to step
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I encountered the same problem with the DC motors I use on my robot. I used a reflective type encoder that read a black and white stripe of the driving wheels, but did not work reliably due to lack of resoulution and interference from ambient light. (...) (26 years ago, 6-Nov-98, to lugnet.robotics.handyboard)
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| | Re: nicad battery
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(...) I'm sure that would be fine. The important things seem to be the 9.6 volts and the relatively high current capacity that nicads provide. The larger the amp-hour rating, the longer you can go before recharging. -- Will , , __@_/ \_@__ |/ | /__, (...) (26 years ago, 6-Nov-98, to lugnet.robotics.handyboard)
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| | Some Parts
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I read somewhere that someone was selling the "hard to find parts" of the HB including the DS1233, HC11, motor controllers and an LCD. I can't find it now... does anyone know of such a thing??? It would help. P.S. - to anyone who is considering (...) (26 years ago, 6-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Science Interest
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Dear Capt. Rutledge, Your ideas sound very interesting! May I suggest that you join the following mailing list. It's a hotbed for this sort of discussion: (URL)Dear Professor Berg, (...) ***...*** Robbie Berg Department of Physics, Wellesley College (...) (26 years ago, 6-Nov-98, to lugnet.robotics.handyboard)
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| | nicad battery
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Is it ok to use a 9.6 volt 700 mAh RadioShack batttery instead of the 500 mAh battery specifed in the instructions?? (26 years ago, 6-Nov-98, to lugnet.robotics.handyboard)
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| | To step or not to step
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Hi all, Iam trying to make up my mind on which type of motor to use on my robot, I have got two stepper motors with built in quadriture encoders and also two 12v 2amp D.C. motors with gearbox's. I have made a test bot built from Lego with two 9Volt (...) (26 years ago, 6-Nov-98, to lugnet.robotics.handyboard)
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| | smooth motor output
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(...) My IC 3.2's do not include the smooth PWM but the code from the handyboard web site works OK. I say "my IC3.2" because although the disc says 3.2 the handyboard says 3.1. Does anybody know if the bug fix concerning the analog inputs on the web (...) (26 years ago, 6-Nov-98, to lugnet.robotics.handyboard)
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| | DS1233 Problem?
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Hello, all: I am having problems downloading the pcode_hb.s19 file. Here's the symptoms... My HB passed all of the construction tests as outlined in the manual, including the DS1233 power monitor. The HB goes into bootstrap mode no problem, but the (...) (26 years ago, 5-Nov-98, to lugnet.robotics.handyboard)
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| | Flow Control
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Hi, Does the Handy Board use flow control? Thanks. Cheers, Ron (26 years ago, 5-Nov-98, to lugnet.robotics.handyboard)
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| | message from france
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Hello, my name is thierry and I am student in a high school of engineers in toulouse in France. I send you this mail because I have a problem to download a program to board with 68hc11a1fn. In France, I bought a book of joseph l.jones and anita (...) (26 years ago, 5-Nov-98, to lugnet.robotics.handyboard)
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| | Digital Output
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Hi, I am having problems with one of the converted SPI pins, specifically the MOSI pin. This is what I did, poke (1009, 0x3c); bit_set (1008, 0x08); I then checked the pin with a logic probe and got a low. I sifted through the other pins and they (...) (26 years ago, 4-Nov-98, to lugnet.robotics.handyboard)
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| | message from france
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Hello, my name is thierry and I am student in a high school of engineers in toulouse in France. I send you this mail because I have a problem to download a program to board with 68hc11a1fn. In France, I bought a book of joseph l.jones and anita (...) (26 years ago, 4-Nov-98, to lugnet.robotics.handyboard)
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| | message de france
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Hello, my name is thierry and I am student in a high school of engineers in toulouse in France. I send you this mail because I have a problem to download a program to board with 68hc11a1fn. In France, I bought a book of joseph l.jones and anita (...) (26 years ago, 4-Nov-98, to lugnet.robotics.handyboard)
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| | RE: AS11_IC
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From: Hector Noriega Date: 3OCT98 to: makarraj@cse.msu.edu To Integrate Assembly Code into a "C" Program The variables declared here become globals in C. A simple example to double a number entered from a "C" program, multiply it in assembly code, (...) (26 years ago, 4-Nov-98, to lugnet.robotics.handyboard)
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| | adc blues
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im working on a project for school, a digital oscilloscope for your pc, but im running into some trouble concerning the ADC part of the project, specially with the noise introduced by the ADC itself to the signal being digitized, (im using a Harris (...) (26 years ago, 3-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Using sonar to approximate RADAR?
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Richard A. Cini, Jr. wrote: <snip> (...) That ought to work fine, provided the cop is almost directly in front of or behind the "perp"; then no correction for angle is necessary. The Polaroid sonar detects objects within about a 10-degree cone. It (...) (26 years ago, 3-Nov-98, to lugnet.robotics.handyboard)
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