 | | Re: Sonar
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Sure did. I used a ceramic disk capacitor... Hope that was okay to use. I just can't find what the problem is with the ranging board. For all I know, it has never worked. This is my first attempt at using it. There really isn't a whole lot to the (...) (27 years ago, 17-Feb-98, to lugnet.robotics.handyboard)
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| | RE: Expanding the memory of the handyboard
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Dear Fred, The Mechatronics class competition was to build autonomous miniature forklifts that would navigate a complex course. In the course, the forklifts had to identify, pick up, and deliver three. The path that the forklifts had to negotiate (...) (27 years ago, 17-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Lego 9V motors work well?
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I'm curious how you went about securing the motors to your robots. I picked up a couple yesterday, and they do seem to be very good quality motors, but just sticking them on "the LEGO way" doesn't work too well. They keep ripping themselves loose (...) (27 years ago, 17-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Expanding the memory of the handyboard
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Dear Kevin, Please forgive this non-answering of your question, but I am curious as to what kinds of hardware projects/software objectives were your students working on when they ran out of 'hc11 memory, and how did they deal with this circumstance? (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | bouncing ball
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Hey! Im a realitivly clueless High school guy. Our Adventures in Supercomputing group is making a mobile robot using a handyboard and 3 or 4 infared sensors. Is tyhe bouncey ball method a good one for having a rover permeate a halled area? the (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | Expanding the memory of the handyboard
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A number of students that used the handyboard in our Mechatronics competition needed substantially more memory than the 16,320 bytes currently available. What options are there to add memory to the handyboard? Thanks to everyone who contributes to (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Interrupt for serial data
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I have been using very successfully for two months now, the code in the attached zip file. It has Interrupt Driven Transmit & Receive functions, both are buffered. I found the code easy to adapt for my specific task. Messages can be "Canned", Fixed, (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Interrupt for serial data
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I have been using very successfully for two months now, the code in the attached zip file. It has Interrupt Driven Transmit & Receive functions, both are buffered. I found the code easy to adapt for my specific task. Messages can be "Canned", Fixed, (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | Digital input cct
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Hi there, I'm in the middle of building a handyboard and I'm having a lot of problems. I'm on part 7.2 (Digital Input cct) and the testdigitals(); function in hbtest.c doesn't respond to the start button. All the chips and RP1 are installed properly (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | Re: pa7 9600 serial output
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(...) You have to re-write the bit_delay loop to take up four times as much time. Just multiply the delay count value by four, e.g., "LDAB #148". Fred (following is the 9600 code.) * take up 0.1042 millisecs * 208 cycles bit_delay LDAB #37 bit_loop (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | using the MC34064 LVI
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Hello, This is a warning for anyone considering using the Motorola MC34064 to replace the DS1233. I have just built a couple handyboards and I had some problems getting them working. I finally tracked the problem done to the LVI. I used the MC34064 (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | Measuring PW
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Has anyone been able to successfully use Thomas Hauri's PW measuring routines?? For some reason whenever I try to load them they crash my IC. Any thoughts?? Joshua Stark j-stark@uiuc.edu Aspiring Computer Engineering Major (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | L293D
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where does the pwm go? ...the "cs" or the "in" pins? ---...--- 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 and (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | Speech Synthesizers
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I am wanting to add speech to the Handy Board. I am currently looking at interfacing a SPO256-AL2 speech synthesizer chip and have a very limited schematic that came with the chip many years ago. Does anyone have a nice set of schematics for doing (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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| | Infrared port on the HB is not working: need help!
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hello! I pulled out my HB today and rtied playing around with the IR port. it does not work for some reasons. I checked the remotes: they are still transmitting! Here are the steps I took: am I missing a step? 1. loaded sony-ir.icb 2. sony_init(1); (...) (27 years ago, 15-Feb-98, to lugnet.robotics.handyboard)
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| | pa7 9600 serial output
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Hi, I'm trying to interface the FerretTronics Servo Controller Chip FT639, to the handyboard using PA7. How can i modify the pa7_9600.asm file to transmit at 2400 baud? thanks, phet (27 years ago, 15-Feb-98, to lugnet.robotics.handyboard)
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| | Re: 68HC11 modes
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The handyboard has to stay in special test mode so that it can switch into and out of 'single chip' mode at will. This is necessary to operate the LCD (which uses either a clever or gross hack depending on your taste). If you are writing code using (...) (27 years ago, 14-Feb-98, to lugnet.robotics.handyboard)
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| | RE: encoders
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(...) In my experience, it doesn't matter how slow the pulse is. The count is increased each time the analog port value crosses outside of the middle range defined by the two threshold values as shown below (please note that you'll need to view this (...) (27 years ago, 14-Feb-98, to lugnet.robotics.handyboard)
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| | RE: encoders
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-----Original Message----- From: Will Bain [SMTP:willbain@cs.umt.edu] Sent: Saturday, 14 February 1998 12:50 To: handyboard@media.mit.edu Subject: Re: encoders (...) trouble.When I try to load the file fencoder0.icb I get a message that ic cannot (...) (27 years ago, 14-Feb-98, to lugnet.robotics.handyboard)
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| | Re: encoders
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(...) trouble.When I try to load the file fencoder0.icb I get a message that ic cannot find the file.Any hints? (...) pulse or what dictates how the count is incremented. I think the file is named fencdr0.icb by default (not fencoder.icb). Maybe (...) (27 years ago, 14-Feb-98, to lugnet.robotics.handyboard)
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