 | | HB files
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Help! I can't open any of the files at the cherupkha site. I presume these are "postscript" files. I've tried various apps to view them without success. I'm workin in a PC enviroment, no MACS or unix. I keep readin about the great libraires out (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re: BotS on TV
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As usual, this mundane matter of workin for a living has interfered yet again with the more pleasant pursuit of robotics (read: missed the show). Was this a PBS show? I would love to have seen this. Does anyone know when this might be shown again? (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re: pressure sensors... non-conductive foam
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Max> Do you think it would also be viable to use a soft Max> NON-conductive foam and then measure the capacitance instead of Max> the resistance to work accurately with lighter pressures? Actually this will work better. I built a grid sensor using (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re: pressure sensors... non-conductive foam
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(...) What a neat idea! Sounds nice and compact and simple to build too. Do you think it would also be viable to use a soft NON-conductive foam and then measure the capacitance instead of the resistance to work accurately with lighter pressures? (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | (no subject)
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Hi, fellow (ro)Botters! Did anyone watch Scientific American Frontiers on Wednesday? If not, or even if you did see it, check out www.pbs.org . PLEASE SEE IT! there's a lot of good links, a complete transcript, and other goodies. But now, onto my (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re:
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(...) yup, it was too short! (...) Phil, couple of questions for clarity. Does it need to go up and down the steps or just up? does it carry stuff? Why is step climbing needed? It might be easier to make a wall climbing bot...or a bot that can leap (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Bots on TV - Nice IR app
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I said (...) You asked (...) (URL) are developing a version of IC for commercial release and are linked via the HB page's software resources page. J (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re: your mail
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No, you can't use PWM outputs that swing from about ~10v-~4v for *digital* output. However, you can pull the 74HC374 (see motor output schematic) out of socket and put a 16pin ribbon cable(rat shack) in the socket. Then take the other end to a (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Looking for a good microcontroller.....
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If you can use an I2c chip, then the Motorola MC68HC11E2 has 2k of EEPROM and costs about 8-10 dollars. You can try contacting Motorola for samples if you are a student I have heard they are free. You need a school letterhead signed by a proffessor. (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re: voltage divider
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Hi Victor, I believe you mean "built in pull up" resister on HB. Yes, you need to take 47k pull up register into accound for the voltage devider circuit. -Pandit ---...--- (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Bots on TV - Nice IR app
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So, I saw the Scientific American show on PBS and I was completelly geeked! It was too short. I was most impressed by the tennis ball capturing contest and by Newton Lab's Vision Car entry. Cognachrome is very cool. After seeing the show I logged on (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Parts substitution
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(...) I believe the wattage just tells you how much power the resistor can reasonable dissipate. Therefore using a transistor which can dissipate more power than what the design calls for is alright, but using one that dissipates less power is bad. (...) (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | Parts substitution
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I have a question on the replacement of the a specific resistor. On the handyboard there is a 3.83K 1/8W resistor. I just received in the mail the last pieces for the board and was shipped a 3.83K 1/4W resistor. Is the wattage citical on this (...) (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | Looking for a good microcontroller.....
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Hi, This question doesn't really belong to this mailing list, but since some of you know quite a lot about microcontrollers I thought maybe someone could help me. I'm working on a project about A Management System for an Optical network. Therefore (...) (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | Re: IR in programs
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(...) Here is a simple example of how to do 'different things' when you press various buttons on your remote. If you press digits, they are displayed on the LCD. If you press rewind, the LCD is cleared. When you press stop, the program ends. If you (...) (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | NOTE 04/10/97 10:50:15
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Hi, Can someone help me understand encoders.asm? This is what I deduced from the code and I'm wondering if my guess is correct. 1. When TIC3 and TIC2 inputs are changed, an "interrupt" in execution occurs and and execution immediately jumps to the (...) (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | voltage divider
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could the voltage divider circuit shown in the Mobil Robots book (page 116 fig5.20b) be implemented as is OR does the built in pulldown resistors cause it to be modified. Thanks for all the brain dumps, victor (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | IR in programs
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How would I use an if/then statement if I used the onboard IR reciever? Earlier, I downloaded a program that Max Davies wrote to determine the different variables for my remote. In the readme file, it says that the rules are set by a command like (...) (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Somewhat C challenged.
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Victor, The peek(0x1000) statement returns the byte at memory location 1000 (hex). In C, the '&' operator is a bitwise AND. So, what you are doing is ANDing 4 and the contents of 0x1000. What's really going on is you are interested in only bit 3 (...) (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | (no subject)
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Hello! Just 1 thing today: 1. Is there any sort of chip that can be wired up to the HB's motor ports, and then convert it to 16 (or less, maybe) outputs? phil thehahns@nconnect.net PS: does anyone know of any robot designs that will allow a robot to (...) (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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