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The Handyboard seamed to work fine for the last few days. Sudently today I got this -POWER GLITCH- message when runing the HB with just IC loaded in it. What does it mean ??? I thought it could be a loose connection or something similar but even if (...) (28 years ago, 16-Aug-96, to lugnet.robotics.handyboard)
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| | Re: Musings regarding Handyboard Expansion & Interfacing
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(...) Dallas 1202 for example, or other models from dallas semi. The data sheets are on their web site ((URL) from memory) There is a example of code for the stamp at: (URL) Seront, seront@seism1.ess.sunysb.edu (MIME ok) (URL) (28 years ago, 14-Aug-96, to lugnet.robotics.handyboard)
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| | Re: Musings regarding Handyboard Expansion & Interfacing
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(...) One of them "smart sockets" (I think dallas makes 'em). Put it in under the RAM chip, no extra wiring necessary. Just some special code :-). (28 years ago, 14-Aug-96, to lugnet.robotics.handyboard)
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| | Musings regarding Handyboard Expansion & Interfacing
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Just got Aug issue of Circuit Cellar. Full of robotics goodies & interface circuits . In the meantime, following are some more of my thoughts on interfacing. ***...*** * MUSINGS ON THE SUBJECT OF HANDYBOARD INTERFACING * ***...*** * Special (...) (28 years ago, 14-Aug-96, to lugnet.robotics.handyboard)
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| | Musings regarding Handyboard Expansion & Interfacing
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***...*** * (More) * * MUSINGS ON THE SUBJECT OF HANDYBOARD INTERFACING * ***...*** * Multiplexed digital I/O * * Sharing those valuable IC and OC pins * ***...*** Expanding a "clever" handyboard I/O line (an IC or OC or PA I/O) into several (...) (28 years ago, 13-Aug-96, to lugnet.robotics.handyboard)
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| | Re: Pulse Accumulator
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(...) How long did it work before? Have you checked the solder and socket connections of the chips in the circuit? Sometimes chips shift in their sockets and incur additional impedance in a connection, causing problems. Is your board subject to (...) (28 years ago, 12-Aug-96, to lugnet.robotics.handyboard)
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| | Pulse Accumulator
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Hello everyone, The pulse accumulator on my handyboard no longer is working. It was working fine, and then the next minute it just stopped... Can I just reaplce the HC11 to fix the problem? Thanks.. joeo@symtec.com (28 years ago, 12-Aug-96, to lugnet.robotics.handyboard)
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| | Re: Servo question
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(...) One thing to note, not all servos are designed to turn 180degrees. The ones designated as "retract servos" are designed to turn 180 degrees, the rest are designed for something around 90degrees. Most can be modified to turn as far as you want (...) (28 years ago, 12-Aug-96, to lugnet.robotics.handyboard)
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| | Pulse Accumulator
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My Pulse Accumulator no longer works... Does anyone know how to fix it? I was using it to measure RPM, and it was working fine...the next minute it just completely stopped working... Can I just replace the HC11? Thanks.. Joeo (28 years ago, 12-Aug-96, to lugnet.robotics.handyboard)
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| | Re: piggyback pentium/powerPC
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(...) Try looking for embedded PC systems. The motherboard are sometimes roughly the size of the HB. You may have to buy controller board also to drive a hard drive or a Solid state disk. Expensive stuff! The good thing about some embedded systems (...) (28 years ago, 12-Aug-96, to lugnet.robotics.handyboard)
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| | Re: Servo question
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(...) You need to go into the servo.c file, and adjust the minimum and maximum frequencies the servo can handle. If you open servo.c, you'll find instructions as to how to do this. You pretty much just have to adjust the program to suit your servo, (...) (28 years ago, 10-Aug-96, to lugnet.robotics.handyboard)
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| | Servo question
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hello everyone I'm playing around with a servo on the HB. i loaded all the progs and got it to twirl, but it won't do a full 180 degrees. i'm just using the servo() command. i suppose servo(1400) is supposed to point it 0degress, but it points about (...) (28 years ago, 10-Aug-96, to lugnet.robotics.handyboard)
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| | Re: bootstrap quirk
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(...) Thanks for the suggestion. Unfortunately, the behavior is the same regardless of whether the interface board is connected to my computer. (...) I believe it is working fine, as the previous tests of it were passed. I did have a problem where (...) (28 years ago, 10-Aug-96, to lugnet.robotics.handyboard)
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| | (no subject)
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More MUSINGS follow. Seeing as my job gets progressively more MANAGEMENT than TECHNICAL these days - is it really inevitable over the years?? - this software/electronic/mechanical exercise called robotics seems a good hobby to do all those things (...) (28 years ago, 9-Aug-96, to lugnet.robotics.handyboard)
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| | Re: IR transmission
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(...) Well actually, even though it's not a precision resistor, when I installed it, I grabbed a bunch of resistors and measured each one with my DMM until I found one which was between the 3.74 and 3.83 values Fred specified. To further test this, (...) (28 years ago, 8-Aug-96, to lugnet.robotics.handyboard)
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| | How to add more IC lines?
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Hi, all It appears that the proposed expansion board will not have any additional input capture functions. I've run out of Input Capture lines on the Handyboard, so does anyone have a suggestion on which processor could best be slaved to the (...) (28 years ago, 8-Aug-96, to lugnet.robotics.handyboard)
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| | Re: IR transmission
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(...) Did you tried to remove the resistor? I actually simply fitted the IR diode in the female header. I found that the red diode beside the header would light less if the IR diode is emitting, since those two diode are installed in parallel. The (...) (28 years ago, 8-Aug-96, to lugnet.robotics.handyboard)
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| | Re: IR transmission
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Also... For Tx I use a high power IR LED with about a 5-10ohm resistor (I can't remember exactly) Because the carrier is 50% duty and the signal is not continuous, this is ok. If you use a lower powered IR LED and/or a higher resistor, you may find (...) (28 years ago, 8-Aug-96, to lugnet.robotics.handyboard)
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| | Re: IR transmission
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Jeff, You are right. Several things could be wrong here. First of all the precision resistor is VERY VERY important. This controls the frequency of the carrier signal. The freq is approx 1/(RC) where R = R4 and C = C6 of the the Handyboard IR Tx (...) (28 years ago, 8-Aug-96, to lugnet.robotics.handyboard)
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| | Re: DC10 turning
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(...) A partial solution which I found is effective in turning a tracked platform on carpet, is to run the pivot tread in the same direction as the turn tread but at a much slower rate. This worked quite well with a Radio Shack Sherman Tank, but the (...) (28 years ago, 8-Aug-96, to lugnet.robotics.handyboard)
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| | IR transmission
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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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| | (no subject)
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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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