 | | brushless motors
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has anyone had any success hooking up brushless motors to a handyboard? basically, the problem i'm having is there is only one gnd pin on the motor, which is both for the internal digital logic and to sink the current through the motor. it's a (...) (24 years ago, 10-Apr-00, to lugnet.robotics.handyboard)
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| | Time measuring problems
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Hi all, I hope someone out there can help me with this, I'm going nutz (actually i think i'm already there). I am trying to measure a short period of time. Ultimately this will measure ultrasonic ping/echo using Kam Leang's ultrasonic circuit. Right (...) (24 years ago, 8-Apr-00, to lugnet.robotics.handyboard)
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| | What is the best brand/type of rechargeable battery and recharger in sizes AAA-D ?
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Hello, I was wondering what types/brands of rechargeable batteries people have used and recommend for common use in electronics such as alarm clock, portable radios, etc.. Thanks, John Jeong (24 years ago, 8-Apr-00, to lugnet.robotics.handyboard)
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| | Re: 5V of trouble
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those two things together strongly suggest that your crystal isn't running. any chance you can get a scope or logic probe to verify this -- measure the E clock output of the 'hc11 (pin 5). also, check that you've properly installed a 2.2 megaohm (...) (24 years ago, 6-Apr-00, to lugnet.robotics.handyboard)
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| | 5V of trouble
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i'm assembling the handyboard according to the instructions found on the HB site. When measuring the E clock signal using a voltmeter, i register 5V instead to the anticipated 2.5V. i've re-checked all the solder joints but there doesn't appear to (...) (24 years ago, 6-Apr-00, to lugnet.robotics.handyboard)
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| | Re: Output to file option for IC?
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(...) Here's a stupid idea, but might be the simplest: Run a dumb terminal program. I keep a very old version of Telix for DOS around for this purpose. Most of the dumb terminal programs have some option or other for logging or capturing to a file. (...) (24 years ago, 6-Apr-00, to lugnet.robotics.handyboard)
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| | Re: Motor Drivers
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(...) As others have said, the system should be able to drive this. However there are some obvious 'thoughts': 1) A light that draws 300mA when running, will _momentarily_ draw a much higher value when the bulb is cold. The actual ratio between the (...) (24 years ago, 6-Apr-00, to lugnet.robotics.handyboard)
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| | Re: Output to file option for IC?
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We have a system that was designed to let you run IC-like code on a host as if it were running on the HB. We use the HB as an extension to a larger mobile robot (the HB turns on lights, motors, etc. Our robot served candy via voice command at last (...) (24 years ago, 6-Apr-00, to lugnet.robotics.handyboard)
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| | Output to file option for IC?
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It would be cool if IC can output results to a file. well, since it can't does anyone have code available for borland c++ which will receive data over the serial port? I found some code from earlier posts, but can't seem to find one that works. I (...) (24 years ago, 6-Apr-00, to lugnet.robotics.handyboard)
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| | Re: Motor Drivers
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300 mA shouldn't be a problem. are your main batteries low? alternately, are you sure it's 300 mA at 9v? can you measure it somehow. fred In your message you said: (...) (24 years ago, 6-Apr-00, to lugnet.robotics.handyboard)
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| | Motor Drivers
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I am trying to run a light with the motor outputs on the handy board. I looked up the spec on the L293D and it claims to be capable of 600mA constant and 1.2A peak. The miniature light I am using draws about 300mA. When the light comes on the handy (...) (24 years ago, 6-Apr-00, to lugnet.robotics.handyboard)
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| | Re: sonar mapping with evidence grid
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(...) home (...) I have read that it is not actually a solid cone angle, but a peak central lobe and a few side lobes. I think the best way to figure this out is to mount your sonar sensor on a rotatable head and go out to an open field. Place a (...) (24 years ago, 5-Apr-00, to lugnet.robotics.handyboard)
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| | Re: LED's
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[Derek Healy] spake unto the ether: (...) This is just an idea skeleton, but not too hard to flesh out, if you've worked with TTL. The Handy Board memory map maps some upper 32K addresses to I/O "ports". Look at the schematic and you can see which (...) (24 years ago, 5-Apr-00, to lugnet.robotics.handyboard)
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| | LED's
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Hi, could anyone tell me how I might light LED's in sequence so that they would simulate a rev counter of an automobile & to also simulate the speed counter. I need to know how I might wire them up and how I might be able to program them using time (...) (24 years ago, 5-Apr-00, to lugnet.robotics.handyboard)
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| | Losing HB memeory
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Hi all, i am having some trouble with the HB memory. i have some calioberated values stored as persistent globals. after running the program few times the HB tends to lose the stored values. What could be the problem? Many thanks Fazal (24 years ago, 5-Apr-00, to lugnet.robotics.handyboard)
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| | Re: Diodes for Sonar Assembly
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yes, this is fine. the 5404s have a higher voltage rating, so they're "better". the 5401's are specified because they'd be cheaper and are already more than adequate. fred In your message you said: (...) I (...) e (...) (24 years ago, 4-Apr-00, to lugnet.robotics.handyboard)
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| | Diodes for Sonar Assembly
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On the official plans on the HB web site, it says to connect 6 1N5401 diodes for a voltage drop. Can I use 1N5404s instead? We got our sonar module the other day and are itching to try it out. After visiting various Radio Shacks I couldn't find the (...) (24 years ago, 4-Apr-00, to lugnet.robotics.handyboard)
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| | Re: IR decode disabling
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I came across the same line in the lib_hb.c-file, hoping to achieve more performance but as I was told by Fred Martin, the default setting is OFF. Dirk (24 years ago, 4-Apr-00, to lugnet.robotics.handyboard)
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| | Re: sharp gp2d12 infrared ranging sensors (fwd)
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A little known fact is that this does NOT work on inputs 3, or 6. Cutting the leads on 1,2,4, or 5 works just fine. If you cut the traces on 3, or 6, simply put a solder bridge across the signal and 5V leads to put things back to normal. If you run (...) (24 years ago, 4-Apr-00, to lugnet.robotics.handyboard)
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| | Re: Gleason Research
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Dear Joe Kopena: We are here and are sorry you have found any difficulty in getting a prompt response. We have no record of having received email from you yourself. We have recently faxed a quote to another party at Drexel. Perhaps your email was (...) (24 years ago, 4-Apr-00, to lugnet.robotics.handyboard)
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