|
 | | Re: Question on analog(). Negative voltage
|
| (...) DO NOT SEND NEGATIVE VOLTAGES INTO THE 6811, you will destroy the analog input circuit. Any voltage outside of the 0 to 5 v range is hazardous, unless it is current-limited to a few milliamps. (...) Are you sure about this? On page 49 of my (...) (28 years ago, 5-Jun-96, to lugnet.robotics.handyboard)
| |
|  
fred
(score: 1.028)
|
|
| | Re: sonar
|
| (...) yes. the polaroid board is pretty sophisticated, really, in that it ramps up the input gain the longer it waits for the ultrasonic reflection pulse. this compensates for the exponential falloff in "volume" as sound disperses on the way out and (...) (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | HB site and 2.x web browsers
|
| So all of my work is incompatible with version 2.x browswers, which don't colorize text. As an interim solution, I have created a site index page -- a single page that points to all pages linked from what are invisible menus if you have a 2.x (...) (27 years ago, 27-Oct-97, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | Re: NiMH batteries?
|
| (...) Well, that is one of the great benefits of NiMH batteries is that they can be charged without ever having to completely cycle them. They are really convienient in Cel phones since you can use a trickle or 'zap' type charge on them no matter (...) (27 years ago, 16-Jun-97, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | Re: speed of the board
|
| the other issue that should be mentioned re: changing clock speed is that it messes up the baud rate of the serial communications. if you plan to use interactive C, would have re-assemble the pcode program with a different baud rate constant, to (...) (26 years ago, 4-Aug-98, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | Re: PA7
|
| (...) no,this is wrong. The servo output is J2 - 9, not J2 - 15. (...) you need a 5 volt source to power the servo. The Handy Board 5 volt supply can be used, but this will put a lot of stress on the system regulator. It would be better to get a (...) (29 years ago, 30-Mar-96, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | Re: Wrong port or boot mode.
|
| Several possibilities: * sometimes serial port stuff breaks on the fastest machines. do you have a slower computer you can try? * the cable is straight-thru (a modem cable, actually). * did you check that the interface output voltages behaved (...) (28 years ago, 18-Oct-96, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | Re: Assembler
|
| (...) 1. please read the IC manual, which is now localized for the Handy Board. this explains how the ICB system works in detail. look on the HB home page to find the IC manual. 2. yes, you need as11_ic. mac and unix versions are readily available. (...) (28 years ago, 15-Apr-96, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | beta testers wanted for LEGO MindStorms
|
| Hi all, LEGO is officially looking for beta testers for their new MindStorms product scheduled to ship this fall. I'm not sure what their selection criteria are, other than that you must live in the States and have Pentium running Windows 95. It's a (...) (26 years ago, 18-Jul-98, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | Re: Need Help to solve the algorithm.
|
| The paper referred to is at ftp://cherupakha.med...Martin.pdf My personal advise is that you simply *get started*. hook up your motors and start driving your robot around. see what it can do, how it moves. then connect sensors and gain an intuition (...) (26 years ago, 21-Jul-98, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | problems with ICB files
|
| oh come on, Randy, you're acting too much like a big software company! "Don't worry that that feature is broken, it will be fixed in our new version!"Most of the time, people would rather hear a workaround than be told to upgrade! Regarding the (...) (29 years ago, 26-Mar-96, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | Re: charger
|
| the main reason this doesn't work is the 1a supply produces too high a voltage at the actual current being drawn, resulting too high a charge rate. technically, it will work in NORMAL charge mode, but you'll be charging the battery too fast, (...) (25 years ago, 10-May-99, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | Re: Yup, it works.
|
| The PWR light isn't really an indicator of power. It's actually hooked up to the 6811's serial transmit line, so it's supposed to flash when the 6811 is talking serial. the BATT light should always blink when the board is first switched on. It also (...) (28 years ago, 4-Jun-96, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | Re: Smoking serial/charger board...!!!
|
| make sure you have a telephone-style and not network-style RJ11 cable. Here is how you tell if you have a telephone-style or network-style RJ11 cable. Hold the two ends together, metal contact side up, as if you were trying to plug them into each (...) (27 years ago, 24-Jul-97, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | Re: Lcd
|
| (...) there are 3 kinds of backlighting * LED * electro-luminescent (EL) * cold cathode florescent tube LED and EL are thin panels behind the LCD glass (tho they do add thickness to the final unit). florescent is miniature lamps that go along one or (...) (27 years ago, 18-Aug-97, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | using Buffalo with the HB
|
| Ronan -- I don't think it's the LCD per se that is causing problems, but rather the fact that the HB runs the 6811 in special mode. The main effect of this is that the interrupt vectors, including the reset vector, live at $bfc0 to $bfff rather than (...) (28 years ago, 1-Oct-96, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | Re: Downloading Problems
|
| 1. don't worry about the slightly out of spec voltages, +/- 5% is just not a problem. 2. you have already demonstrated that your board HW is OK by communicating from a Windows system. therefore 3. it is probably a cabling problem from your mac. you (...) (27 years ago, 15-Oct-97, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | back-ordered from DMS/Prabal Dutta?
|
| Hi everyone, I have been receiving word of people having orders 8 to 10 weeks old with Digital Micro Systems/Prabal Dutta that have not been filled. I would like to assess the situation more generally. If you presently have items back-ordered at (...) (27 years ago, 17-Jul-97, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | Re: ir obstacle detector
|
| In your message you said: (...) en bounce the IR off walls. yes, but the tv remote technology includes automatic gain circuits, so you have no way of telling HOW FAR AWAY the original signal source is. (...) ough? You can use a simple reflectance (...) (28 years ago, 10-Dec-96, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
|
| | Re: pcode downloading
|
| (...) OK, well I think it is isolated at the pseudo-MAX232 chip. Did you get the +10 v power supply pin on the p-MAX ok? It's at pin 2. Measure it w/r/t ground and you should get +10v. Before you order a real Maxim, check the polarity of your (...) (28 years ago, 3-Jan-97, to lugnet.robotics.handyboard)
| |
|
fred
(score: 1.028)
|
