 | | difference between stepper & dc
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hi, I'm doing a robot to navigate it to a destination that needed to avoid obstacle collision along the way. Besides, I intend to use 2 dc motor ( 12v ,0.9Nm, 310mA rating) for the 2 wheels and include the encoder too. Should I use stepper for such (...) (26 years ago, 6-Oct-98, to lugnet.robotics.handyboard)
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| | Nevermind Squared...
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Ok, after reading it for the nth time, I think I understand this statement now: <<The normally open case means that the sensor line is pulled high by the 47K resistor on the Handy Board. The standard software for reading the state of a switch (...) (26 years ago, 6-Oct-98, to lugnet.robotics.handyboard)
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| | Nevermind...but, What is Normally Open?
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Ok, I feel real dumb. I could have sworn I didn't see the answer to that last question when I read the printed version of the docs I had. Now, I found the answer at: <<el.www.media.mit.e...dex.html>> I guess I was scanning the text for reference to (...) (26 years ago, 6-Oct-98, to lugnet.robotics.handyboard)
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| | Thanks! I found the FAQ and Archives...
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Thanks all for the motor tips! I've found the FAQ and the Mail List archives...so I shouldn't be asking so many dumb questions. However, since I've checked the FAQ and am have 45 minutes left doownloading the Archives...I have another (...) (26 years ago, 6-Oct-98, to lugnet.robotics.handyboard)
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| | Re: finding parts for Handy Board
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Russ, From your email address I assume your are looking for parts in the UK. SRAM - I don't have a Farnell catalog around but almost any 32Kx8 SRAM should work. RS part number: 311-007 Toshiba TC55257DPI, 265-465 NEC uPD43256. 68HC11 - The (...) (26 years ago, 6-Oct-98, to lugnet.robotics.handyboard)
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| | RE: finding parts for Handy Board
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The PLCC version of the 68HC11 is the one that you want. The part number from R.S. is 265-853 and in the July 97 - October 97 catalog it cost 7.50 pounds + VAT. This price has no doubt increased but the stock number should be correct. The 32K RAM I (...) (26 years ago, 6-Oct-98, to lugnet.robotics.handyboard)
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| | finding parts for Handy Board
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Hi all, I have just got a set of blank P.C.B's from Douglas electronics and now trying to get all the parts togrther to build the Handy Board. I have managed to find all the parts from R.S. components and Farnell Electronics except for the 32Kbit (...) (26 years ago, 6-Oct-98, to lugnet.robotics.handyboard)
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| | Re: Yeeee Haaaa! and Will this motor work?
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the "correct" way is to measure their resistance with an ohmmeter. if it's less than 5 ohms, it might be a problem. the "other" way is to just plug them in and turn on the motor outputs. as long as you use full power (not any of the software-reduced (...) (26 years ago, 5-Oct-98, to lugnet.robotics.handyboard)
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| | Serial I/O again
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Greetings! I need a "good" sample of how to do serial i/o between the Handy Board and a host computer. The host computer I am intereested in is running MACOS (8.X). Here is the scenario: - The HB has an IC program downloaded on it. - The program (...) (26 years ago, 5-Oct-98, to lugnet.robotics.handyboard)
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| | Yeeee Haaaa! and Will this motor work?
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Hi all, Yeeee Haaaw! I just got my HB in from Gleason Research Friday and started figuring it out this weekend. WOW! What a blast! It was worth eating peanut butter sandwiches for 3 months to save up for! ;-) This is EXACTLY what I've needed to get (...) (26 years ago, 5-Oct-98, to lugnet.robotics.handyboard)
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| | RE: Wireless Link to HB
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Dave, I have been doing radio communications between my HB and a remote sensor but I am sure you could use the same radios for communicating with a PC at up to 2400 bps. I have been using an Elsema transceiver coupled with an FSK modem chip. (...) (26 years ago, 5-Oct-98, to lugnet.robotics.handyboard)
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| | Need help -- connecting a 4x40 LCD
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Hi all, I need to connect a 4x40 LCD to the Handy Board. The "daughter board"(*) seems to contain the HD44780 controller and a 2x16 LCD. Ideally, we'd like to remove only the 2x16 LCD and replace it with a 4x40 LCD that supports the HD44780. Any (...) (26 years ago, 4-Oct-98, to lugnet.robotics.handyboard)
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| | Replaced switch problem...
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Hi everyone, I hope you all are happy with each and every of your HANDYBOARDS, because I am not. I have just solved my RESET problem by changing the "tri-state bus controller" 74hc244 chip, I can RESET my HB by switching it off first, then on. This (...) (26 years ago, 4-Oct-98, to lugnet.robotics.handyboard)
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| | Fred thanks it Works Great but serial comm(?!) trouble
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Fred, Thanks the Polaroid sensors work great. But I'm having trouble getting the two Handy Boards to commicate using Randy's routiine for the 6.270 board. I have one board print everything that it gets from the serial port. And I have another (...) (26 years ago, 4-Oct-98, to lugnet.robotics.handyboard)
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| | RJ 11 data transfer to HB
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I was wondering if anybody knows how data is transfered through the RJ 11 modem cable to the Handyboard (i.e. the pin layout). My intention is to use this information to look for/ design a wireless link. Also, I would like to know if anyone has (...) (26 years ago, 3-Oct-98, to lugnet.robotics.handyboard)
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| | Re: Running Assembly Programs
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BS (shahian), I have written a Machine code programming system, that I use for the Handyboards, in the microprocessor classes I lecture at this university. The Machine code programming system is similar to the Motorolla Buffalo Operating system for (...) (26 years ago, 3-Oct-98, to lugnet.robotics.handyboard)
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| | (no subject)
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Dear Madhusudan, You have to buy the commercial version of IC to get these features. See (URL) for information. Regards, Fred Martin In your message you said: (...) (26 years ago, 2-Oct-98, to lugnet.robotics.handyboard)
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| | (no subject)
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Respected Sir, I have read through the Nine rules you mailed me. Iam getting starting with my project. I have a question that can we use structures and Double dimensional arrays in Interactive C. If we can use what will be the syntax. Thanking you, (...) (26 years ago, 2-Oct-98, to lugnet.robotics.handyboard)
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| | Wireless Link to HB
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I know that this subject has been discussed before, but I was wondering if anybody has succeeded in establishing a 2 way wireless link between a pc and the handyboard. I will appreciate any information. Thanks. Dave (26 years ago, 2-Oct-98, to lugnet.robotics.handyboard)
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| | (no subject)
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Respected Sir, Iam a student at Bradley University, Peoria. Iam doing my M.S in computer science.As iam doing a project on Handyboard as part of my course. So, Sir Please add me to the Handy Board mailing list. I have studied about the Interactive C (...) (26 years ago, 2-Oct-98, to lugnet.robotics.handyboard)
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