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 | | Re: Battery use
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| Yes, but it won't last long. The HB's electronics draw around 20 - 40 mA. the lifetime of an alkaline 9v is approx 1 Amp hour. So that give you 25 - 50 hours of run time. In practice, you'd get less, 'cause the 1 AH rating assumes a much slower (...) (23 years ago, 19-Dec-01, to lugnet.robotics.handyboard)
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fred
(score: 1.045)
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| | Re: HELP!! Dead board
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| You shouldn't be seeing voltages over 5v anywhere in the logic circuits. Test if the 7805 is producing more than 5v, or if the RAM circuit (which is on a separate regulator) has more than 5v. In practice I'd rarely see more than a 0.2v error from (...) (24 years ago, 30-Nov-00, to lugnet.robotics.handyboard)
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fred
(score: 1.045)
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| | Re: Download from Notebook on Windows 2000
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| I don't know why HBDL doesn't work sometimes. Can you try dl.exe. It's part of the stock Interactive C distribution. There are command line switches to tell it to use COM2. You'll have to throw away the PIF file that comes along. Sometimes it works (...) (24 years ago, 11-Aug-00, to lugnet.robotics.handyboard)
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fred
(score: 1.045)
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fred
(score: 1.045)
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| | Re: MOTOR DRIVERS
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| It won't necessarily fry the chip. L293s (and the TI equivalent) have a thermal protection mode. If the chip gets too hot, it will turn itself off. Most of the time, this protects the chip against over-current. However, it is still possible to fry (...) (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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fred
(score: 1.045)
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| | Re: handy board serial port
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| you have to reprogram the serial configuration register. download the 68hc11 documentation at handyboard.com/techdocs/ and read the chapter on the SCI (serial communications interface). after poking new values into the SCI registers to get the (...) (24 years ago, 8-Nov-00, to lugnet.robotics.handyboard)
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fred
(score: 1.045)
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fred
(score: 1.045)
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| | Re: Building Fences
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| I have an idea that uses 1x1 bricks, 1x3 plates and 1x8 tiles. Very simple for straight runs, 1x3 elbow plates do corners. 1x1 plates for top caps or and decor you like. I have a picture of the idea at... (URL) Carcanague (23 years ago, 16-Nov-01, to lugnet.town)
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fred
(score: 1.045)
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| | please delete "Pretty Park.exe"
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| hi everyone, some bozo sent us spam with a virus on it. make sure to delete "Pretty Park.exe". i'm reporting the spam. it's a little confusing 'cause in the copy we received, it doesn't have handyboard@media as a destination anywhere. if spam (...) (25 years ago, 3-Dec-99, to lugnet.robotics.handyboard)
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fred
(score: 1.045)
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fred
(score: 1.045)
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| | Handy Board web site ISP switch
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| Hi all, I'm switching to a new ISP to host the Handy Board web site. During the next few days, the URL might not resolve properly. If you have trouble loading handyboard.com, you can use (URL) . This works now. Hopefully the switch-over will be (...) (23 years ago, 31-May-01, to lugnet.robotics.handyboard)
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fred
(score: 1.044)
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| | Re: IR proximity detectors
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| you won't be able to easily) get distance measures with standard IR comms parts (such as the IS1u60). light travels too fast for the time delay betw xmit and rcv to tell you anything. as a proximity sensor, all you get is a yes/no reading. if you (...) (25 years ago, 7-Oct-99, to lugnet.robotics.handyboard)
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fred
(score: 1.044)
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| | Re: HandyBoard Charging
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| ok, you have the stock adapter. like i said, sometimes the batt does get fully charged and then not enough current flows in trickle-charge to light the LED. but that's normal, so it doesn't sound like there is actually a problem. a simple way to (...) (25 years ago, 16-Nov-99, to lugnet.robotics.handyboard)
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fred
(score: 1.044)
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| | Re: LEGO sensor
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| just to be clear, there are two types of LEGO sensor: active and passive: * passive -- touch sensor, temperature sensor. * active -- light sensor, rotation sensor (aka shaft encoder, angle sensor) without expansion board, the HB can only deal with (...) (25 years ago, 10-Jan-00, to lugnet.robotics.handyboard)
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fred
(score: 1.044)
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| | Re: Help! Hanyboard Assembly Testing problem!
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| Sam, can you check the serial input circuit. if this is not correct, then the 6811 won't stay in boot mode. make sure RP4 is a 1Kx4 resistor pack (4 discrete resistors) and not a 1Kx7. also make sure R15 is installed. see (URL) . also, try putting (...) (23 years ago, 15-Jan-02, to lugnet.robotics.handyboard)
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fred
(score: 1.044)
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| | Re: Handyboard and 1400 mAh NiMH battery
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| Hey -- I like your device. That's a nice addition to the HB. I would like if you would modify your assertion "However these days NiCd battery are hard to find and not very effecient" (sic). This is not true. Despite the technical superiority of (...) (22 years ago, 8-Oct-02, to lugnet.robotics.handyboard)
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fred
(score: 1.044)
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| | First Internet Robot Contest
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| Hi all, If you're a hobbyist and you've built a cool robot, consider entering it in the First Internet Robot Contest. Prizes include LEGO Droid Developer Kits, a Handy Board, and other fun stuff. I'm on the jury -- but I did promise the organizer (...) (24 years ago, 29-Oct-00, to lugnet.robotics.handyboard)
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fred
(score: 1.044)
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| | Re: Echoing printf to terminal
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| this is non-trivial. The -loopback option isn't what you think it is; it's a flag telling the downloader that the low-level serial ckt has a hardware echo. it's relevant to an earlier 6811 design (the mini board), not the HB design. this would (...) (23 years ago, 25-Feb-02, to lugnet.robotics.handyboard)
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fred
(score: 1.044)
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fred
(score: 1.044)
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| | Re: fried memory
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| it might not be permanently dead, but if it's not, it's not working. one (or more) of the outputs of these two chips is probably shorted to ground or shorted to +5v. the chips get hot when they try to drive this output to a state other than the one (...) (25 years ago, 26-Oct-99, to lugnet.robotics.handyboard)
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fred
(score: 1.044)
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