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Well, in my quest for new and neat things to add to my robot, I've decided to start exploring IR transmission. I downloaded the REC80 routines, and have figured out that one of my TV/VCR/cable box remotes is compatable for the TV and VCR. It gives (...) (28 years ago, 8-Aug-96, to lugnet.robotics.handyboard)
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RE: Attached processors... I have considered different ways of refining PWM speed controls on the HB, and have decided to try adding another 'HC11, and use the PWM code example in the Handbook. This seems easier (and smaller) than building it from (...) (28 years ago, 8-Aug-96, to lugnet.robotics.handyboard)
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| | Re: piggyback pentium/powerPC
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(...) Or use the 32-bit Hitachi SH7032 microcontroller. An evaluation board sells for only $100 (I bought mine from Marshall Industries). It runs at 20MHZ, has 4GB address space, DRAM circuitry, 10-bit A/D, several timers, and I forgot what else. (...) (28 years ago, 8-Aug-96, to lugnet.robotics.handyboard)
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| | piggyback pentium/powerPC
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Already serveral ideas have been mentioned on processor upgrades. Instead of such a quantum jump, why not instead a small bunt. ie. Motorola has recently announced availability of the 68HC12. Although certainly not the screamers of a PowerPC, et.al. (...) (28 years ago, 8-Aug-96, to lugnet.robotics.handyboard)
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| | Re: DC10 turning
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(...) That's how I've been doing it. I'm still having trouble turning. I partially solved the problem by applying some belt dressing (from my local Kragen auto parts store :-) to the treads, which helps some with the grinding I get from the drive (...) (28 years ago, 8-Aug-96, to lugnet.robotics.handyboard)
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| | Musings regarding Handyboard Expansion & Interfacing
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More "musings":- ***...*** * MUSINGS ON THE SUBJECT OF HANDYBOARD INTERFACING * ***...*** * Generating Chip Selects and Address Signals * ***...*** These are my thoughts on (re)generating some needed signals on an expansion board to allow more (...) (28 years ago, 7-Aug-96, to lugnet.robotics.handyboard)
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| | RE: DC10 turning
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(...) A _long_ time ago, Dave Williams and I got into a discussion about tank treads and turning etc. I ran some experiments on a Radio Shack Sherman Tank toy I was using (the original "RoboTank" in my case) In a nutshell we proposed a mathematical (...) (28 years ago, 7-Aug-96, to lugnet.robotics.handyboard)
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| | Re: piggyback pentium/powerPC
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(...) Pentium and low power can hardly be used in the same sentence. (...) If someone wants to design a piggyback 32 bit machine for the handy board, I will suggest the 68360. It is really powerful, and has all the glue logic in it for several megs (...) (28 years ago, 7-Aug-96, to lugnet.robotics.handyboard)
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| | DC10 turning
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Hi Jeff (...) I had the same problem. I got some improvement by running the treads in opposite directions. Turns real quick then! And the drive tread does not have to carry the whole force of the turn plus "slip" or pivot the stationary tread. Keith (...) (28 years ago, 7-Aug-96, to lugnet.robotics.handyboard)
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| | piggyback pentium/powerPC
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I realize that what I'm asking for is hardly cheap, but I'd like to piggyback some real computing power with the handy board. Can anyone suggest components for: - a small low-power pentium/powerPC with min 32MB RAM and a pair of serial (...) (28 years ago, 7-Aug-96, to lugnet.robotics.handyboard)
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| | Re: Charging the battery
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Make sure your adapter is 12v, 500 mA. If you have a voltmeter, measure the open-circuit voltage (when it's plugged into the wall, but not operating anything); you should get around 17 v. -F (...) (28 years ago, 7-Aug-96, to lugnet.robotics.handyboard)
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| | Glue/Caulk thread
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GE's Silicone 2 is an amazing adhesive when you want to mount something firmly but might want to be able to peel it off and reposition it later without damaging the surface. Again, its flexible, cures overnight (for the most part) and doesn't have (...) (28 years ago, 7-Aug-96, to lugnet.robotics.handyboard)
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| | Re: Electronic Compass
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(...) I was the one who had the Vector-2X working with the Miniboard not using the SPI bus. I won't try and talk you out of it, it may just work for you. Make sure you get the current documentation from Precision, the original docs I got from them (...) (28 years ago, 6-Aug-96, to lugnet.robotics.handyboard)
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| | Electronic Compass
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OK, I finally got the prices for the KVH C100 and the Vector 2X electronic compasses, both referred to as low cost. The KVH is $700, the Vector 2X is $50. EASY decision, even though the Vector's accuracy isn't as good. It'll be here tomorrow. Now, (...) (28 years ago, 6-Aug-96, to lugnet.robotics.handyboard)
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| | Re: my bot
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(...) I found the best way to mount micro switches is silicon bathtub caulk. It is flexible, and strong. (28 years ago, 6-Aug-96, to lugnet.robotics.handyboard)
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| | Musings regarding Handyboard Expansion & Interfacing
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I have been playing with my Handyboard (from Digital), and am still waiting on the little mobile platform I decided to start out on. (My retired father-in-law is a mechanical creator, & is PC literate, so I am planning on getting him involved after (...) (28 years ago, 6-Aug-96, to lugnet.robotics.handyboard)
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| | Manipulator Question
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Hello, Could someone please tell me if there is a (not-so-expensive) manipulator which can be driven by HB? I'm quite interested in driving the manipulator to draw a text on a sheet of paper. Or, do I have to look for a plotter instead? I'm using (...) (28 years ago, 6-Aug-96, to lugnet.robotics.handyboard)
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| | Re: my bot
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(...) Heh, I ripped the front end off as well. Other than that, I did the exact same mods. Wow. :-) (...) I've got the sonar going - it's neat for looks, but I'm still working on putting enough code behind it to make it fast and functional - servos (...) (28 years ago, 6-Aug-96, to lugnet.robotics.handyboard)
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| | Re: jbmiller and Hammatzu IR
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Hi Patrick, I assume that you're using the stock S4282/LED setup? It is possible to get better range using a slightly different configuration. The range is largely a function of the the LEDs intensity. Since the S4282 modulates the LED at 1/16th (...) (28 years ago, 6-Aug-96, to lugnet.robotics.handyboard)
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| | Re: jbmiller and Hammatzu IR
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jbmiller wrote: I was also wondering if anyone has played with the Hammatsu IR modulator IC, which was recommended to me by Digital Micro Systems (great tech support!!). It's an IC that has all the de/modulation hardware, collector (less emitter) (...) (28 years ago, 5-Aug-96, to lugnet.robotics.handyboard)
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