 | | Re: Robot base
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I built a base for $50, including tools. It was made out of L-channel metal girder. It had 2 drive motors, bought surplus, from those kid-cars ($12 apiece). There's a caster as the third wheel ($4), and I have a 12v 4a battery ($10) plus metal ($10) (...) (26 years ago, 12-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Robot base
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Don't do it. Unfortunately the volumes of robot building do not support building and selling robot bases, the base price for a "good" robot base ends up being about $500 list. The reasons are manyfold, but I'll enumerate some of them here so that (...) (26 years ago, 12-Feb-99, to lugnet.robotics.handyboard)
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| | Handy Board in Popular Science
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The Handy Board is part of a robot design in Popular Science magazine. Someone designed a worm-like robot using the handy board. It is the march 1999 issue. -Peter ---...--- Peter Eacmen Boston Latin School babylongod@usa.net knowledge is power (...) (26 years ago, 12-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Robot base
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Hi er...um...whoever you are, Here's my profile and feedback: Me: 30's database programmer with a little electronics kit construction experience. Interests: Learning Robotics Hardware, Software and Theories Goals: To first experiment and learn a (...) (26 years ago, 12-Feb-99, to lugnet.robotics.handyboard)
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| | NVRAM for the HB
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Hello all, A while ago someone was looking for NVRAM for the HB. I wanted to tell everyone about a new Simtek NVRAM chip I found that isn't battery backed SRAM like the Dallas chips. It contains an EEPROM 'shadow' of the SRAM and transfers the (...) (26 years ago, 12-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Motor Driver Chips
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try here: (URL) - - - Nick - - - (...) (26 years ago, 12-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Motor Driver Chips
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www.acroname.com do them... tone (...) (26 years ago, 12-Feb-99, to lugnet.robotics.handyboard)
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| | Motor Driver Chips
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Greetings all! I was wondering if anyone out here knows of a place that carries the TI SN754410 motor driver chips so that I can upgrade the Handy Boards motor drivers to handle more current. Thank you. -- "Only two things are infinite, the universe (...) (26 years ago, 12-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Robot base
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I bought a "Rising Bird Turbo 7" radio controlled car, ripped out the receiver electronics, hooked up 12 rectifier diodes to the motor and a 1W, 10 ohm resistor to the steering electromagnet and bolted a piece of very light wood to the chassis and (...) (26 years ago, 12-Feb-99, to lugnet.robotics.handyboard)
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| | Re: IR remote problem
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(...) I have seen this occasionally. As long as it's consistent for each key, I think the best bet is to just assume the data size is the larger of the two with trailing 0's for the shorter one. I can't promise this works though, as I've only had a (...) (26 years ago, 12-Feb-99, to lugnet.robotics.handyboard)
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| | [Fwd: Scotchflex]
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(...) (26 years ago, 12-Feb-99, to lugnet.robotics.handyboard)
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| | RE: Robot base
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I personally like building my own bases. I don't know about anyone else but I find it more of an achievement if I build everything that went into my robot. -Peter (...) group for quite a while now and I did notice that there seems to be a lack of (...) (26 years ago, 12-Feb-99, to lugnet.robotics.handyboard)
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| | re: RE
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hi all, my take on the email format issue is that nearly everything should be handled on the client side. in other words, write your filters to deal with the "re's"; figure out that mail is from the handy board list by searching for (...) (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Large circuit construction - How?
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I was going to suggest Scotchflex, but I've always gotten it from a university stockroom. I haven't been able to find it in any of the catalogs I have. Does anyone know any suppliers, besides going to 3M directly? -Scott (...) (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | Robot base
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Hi I have been following this mailing list and the comp.robotics.misc news group for quite a while now and I did notice that there seems to be a lack of good quality and reasonably priced robot bases. All the ones I saw where way overpriced or way (...) (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | is there a place where I can find programs for handyboard?
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Hi, I want to know where I can find programs written to make a wandering robot with the HB, also any other programs to do other things related to robotics. Thanks -Mike (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | IR remote problem
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I picked up a surplus remote control at Halted Specialties ((URL) and am trying to use Max Davies' IRINT.ICB, IR.C and TEST.C, and I'm not having any luck. I'm seeing two main problems. 1) Some keys give 35 bits of data, and some give 38 bits. 2) (...) (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Subject headers
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(...) On the contrary, I have numerous email come in and, therefore, cannot take the time to read the all. This helps me to quickly determine if it is a new subject to address or not. Scott Sherman IT Spec. II ACS SCSU (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | RE: Expansion board assembly tips?
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Before you do anything else, I would suggest cut to length the male headers which interconnect with the HandyBoard, and plug them into the appropriate sockets on the HB. Note that the mating pins are too long to insert fully into the sockets. This (...) (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | Need Help - 68HC11E1/68HC24 and 32K external RAM
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I have a HB w/exp brd and have just acquired a TCOMP PortMaster board (by Ray's Tiny Racers) which I would like to use on a 'robot dispatch base station'. Other than two PWM motor ports it has no other accessories ( ei beeper, IR detect etc.). It (...) (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Disaster :-(
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it's extremely unlikely that removing a battery will have done any harm. which program precisely are you using to download the pcode? you should be using HBDL.EXE or DL.EXE or DLM.EXE. you should be trying to download PCODE_HB.S19. also, make sure (...) (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | Thanks
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Thanks for the info, it helps allot!!!. Clancy (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Subject headers
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(...) Most email packages automatically insert this and it is quite alot of trouble to disable this for just one list. I usually look at the subject line and remove multiple "RE:" manually and some email packages do this automatically, too. I (...) (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | Disaster :-(
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Hi all, Help, I suspect that my handy board is dead..:-( I had it running at work and my boss pulled a battery out of the pack while a program was running. I now have the black squares across the top row indicating that there is no pcode or program (...) (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | Subject headers
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The "RE" in the subjuec headers is redundant. Also it confuses some of the e-mail filters. Please leave out the "RE". Thanks Ed Spike 73,33 -- (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Expansion board assembly tips?
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there are bldg tips at (URL) your message you said: (...) (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | Large circuit construction - How?
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Hi All What is a good method to build circuits with say 5-10 ICs or more (say 14 to 20 pins on each IC) and assoicated discretes? I have been able to construct on Rat Shack et al copper proto boards circuits with 1 or 2 ICs and point to point wiring (...) (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Expansion board assembly tips?
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Hello All, My expansion board went together well considering I have little experience building kits. Try to get the header pins straight before sodering all the pins. Terry G. ---...--- (...) wondering (...) at (...) (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Stack Overflow
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Hi everyone: Sorry for the reply latency, I was buried under an avalanche of work and assignments. Changing the format of the code (as detailed below) helped immensely. I re-wrote two of my drivers to use the increased size, and everything is (...) (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | HELP
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I am just wondering if anyone has had an experience with New Micro's NMIX - 0020 board before? I am having problem downloading my program. Regards, Felix (26 years ago, 11-Feb-99, to lugnet.robotics.handyboard)
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| | Re: MC 68HC711 E9CFN2 - please help me as soon as possible!!!!
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(...) The EPROM is probably disables with a setting in the config register. If folks are looking for cheap 68HC11A1FN's, I was able to get 'em for about $5 each, and they came with a bunch of other electronics, and 2 motors. Turns out Connor disk (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Purchase a handyboard? where???
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(...) I recommend saving up your milk money and buying a pre-assembled, tested HandyBoard. Sure, it costs a little more, but for me (electronics moron that I am) it was worth it. I bought mine from Patrick Hui at the Robot Store in Hong Kong. I can (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Polaroid Sonar Questions
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(...) <snip> (...) I found that returning the median (middle value) of three successive readings filters out the noisy readings quite well--especially the occasional large error. Just a couple nested if-then statements are needed. (...) Sure, that (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | Expansion board assembly tips?
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I just got a expansion board kit from Douglas Electronics and was wondering if anyone has any tips for assembling the board, I'm quite experienced at building kits but I thought maybe someone who had built the kit already might offer some advice, (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Stupid multiple sonars...
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(...) It is correct that you can use the remaining SPI pins as digital outs to trigger a second sonar. I've done it and it works fine. It's also true that there *is* signal contention on the echo lines if you simply plug 'em both into the same TIC (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Beginner's questions...
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(...) You'll need slotted disks mounted on the axles positioned between the emitter and the detector. I recommend using ones from a dead computer mouse. (...) You ought to check for wiring problems and excessive friction in the gears and axles. That (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | RE:Handyboard project
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Hi James, I purchased an assembled and tested H Board from Patrick Hui for about $200, as well as the registered version of IC. Also got his sensor kit ($15). Expansion Board was purchased from Gleason for $59. Also bought the sensor/motor kit from (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | Re:Re: Beginners questions
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I got the gear sets from HVW Technologies in Canada. (URL) gear sets were pretty cheap when you take into account the exchange rate - about $20 for two. They come with motors but youll have to swap them with something else because the motors are (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | etching a handyboard
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What is the best way to manually etch the handy board, i've etched it by passing the circuit layout through the printer 3 times then ironing it on to the copper board. This works well but some traces bleed together. I have access to a PCB repair (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Canadian Boarder
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Digikey has a Canadian division also, its based out Ontario. I just recieved a list and they mostly everything on the list that has digikey beside it but nothing else. The total cost for these parts is $60 + or - $5. I hope this helps, where are you (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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