 | | 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 (...) (26 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 (26 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 (...) (26 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 (...) (26 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. (...) (26 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 (...) (26 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 (...) (26 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 (...) (26 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: (...) (26 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 (...) (26 years ago, 6-Apr-00, to lugnet.robotics.handyboard)
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