 | | Re: New motor drivers
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(...) I am running 12 volt motors that draw about 1 amp each. They were the only motors that I had available for the project so I made due. Keith Keith Soldavin kas219@email.psu.edu (URL) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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(...) Yup. I have one of those tapeless tape measures with the smaller transducer, and the handyboard connected one is louder, so I wonder if that might be something? (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Tom, Are you hearing a ticking sound coming from the transducer? Let me know. (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Hi, with all this talk of sonar, I thought I finally get to hooking mine up. All I get is 8". If I unplug it, I get 0". I'd swear I have it hooked up right. Someone sent out a mail earlier this week, and I had mine hooked up just like it said. I (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | RE: Motorola Microprocessor source
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I got my 6811s from Allied Electorics - www.allied.avnet.com My LM052Ls came from Marshall - www.marshall.com For the Sharp IS1U60, I substituted the Sharp GP1U58Y. I got them from NovaSoft 1-804-272-5752 or 1-407-672-6780 Note that the pin (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: New motor drivers
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Keith, How much current do your motors require. The SN754410 offers 1A per channel. If your piggy back them you can increase this to 2A/channel. Let me know. (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: External power for motors
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Phil, Let me tell you that when someone made the same suggestion to me I hade to reconsider the demolition of my beautiful (expensive!) HB. My solution is this.... Simple take up pin 8 of the driver chip (SN754410) and wire it so that it may be (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Keith, On the ftp site under ???/contrib/kent/sonar there should be a file called sonartst.c This file tests the unit goven that you've included sonar.icb in the initial loading of library files. The file simply calls the ping(0) routine then waits (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: New motor drivers
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The 18200 requires 12V motors, is that what you have? I ask because they are fairly unusual in small bots. --Chuck (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | New motor drivers
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Does anyone know an easy way to replace the motor drivers on the handyboard with the 18200 chip from National Semiconductor? The motors I am going to be driving need more current that the old ones can put out so I need to upgrade. I know that they (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Motorola Microprocessor source
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Does anyone have a source for the following parts or suitable substitutes: Motorola 6811 microprocessor Hitachi 16x2 LCD Sharp IS1U60 infrared demodulator SGS-Thompson L293D motor driver William F. Conroy III conroyw@acm.org Lt Col, USAF (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Motorola Microprocessor source
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(...) Most Connor disk drives have a 68HC11A1FN on them. If you find someone throwing one away, it is a cheap HC11. (...) Digi-key sells these. (...) Ben Wirz sells these. Also look for the TI replacement possibly. (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | Hall Sensor
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Hi, Does anyone have recent model #'s, part #'s, or suppliers for Hall Effect magnetic sensors that interface directly with the Handy Board. There is a picture of a Hall sensor on page 52 of the Handy Board Technical Reference, but no part number or (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | Re: system time
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please get me off this mailing list (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | re: ztx614
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(...) I just looked back to the IR transmitter schematic... The 1K res + RED LED you see there is for the only purpose of having a visible feedback of IR transmission. The IR Led and it's limiting resistor (if the case) will be connected in series (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | re: ztx614
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On Wed, 19 Mar 1997, Stefano Nardone wrote (...) Thanks! that was not clear, where did you find info on j7? Is there a IR transmitter in the parts list? I didn't see one? Do you know what to use for a transmitter? thanks, jm (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | LCD compatible
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Does anyone have experience using a Truly MCC162A1-2 16x2 LCD? I bought one from Wirz electronics for the handyboard. In assembly step 6.something, it says to power it up and there should be *faint* segments lit, if they are dark check pin1 to (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | re: ztx614
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(...) How are you gonna get 100 ma through a 1k resistor biased by 5volts?? The max would be 5ma. I have *never* heard of a LED this size that can handle more than 20ma!! This LED is tiny. I don't know where pin one of the jumper goes to or its use (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | re: ztx614
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(...) I think it must better be a darlinghton and it must support enough current: if you want to get 0.1A or more pulsed current in the IR led, the transistor must have a rather high current gain, more than that of an ordinary npn trans (by the way (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | system time and casting
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Hej >joema@mpx.com.au wrote: >When I try to use the system time as part of an expression >in an if-else statement I get an error message while >trying to download to the board. Goes something like : >type <float> cannot be used in a conditional >Is (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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