 | | Re: your mail
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(...) The chip you are really interfacing with here is the HD44780 controller on the back of the lcd. It has a character set and a register. You write the register and the controller displays the appr. member from its char. set. There is some (...) (28 years ago, 31-Mar-97, to lugnet.robotics.handyboard)
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| | where to get screens
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Does anyone know of a place to order LCD screens? I usually ordered them from Mouser but apparently the manufacter has discontinued that line. A would appreciate any help as to where to order them. Thanks in advance... (28 years ago, 31-Mar-97, to lugnet.robotics.handyboard)
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| | Re: AS11
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DB - Define Byte ; allocates one byte of storage with initial value specified DW - Define Word ; allocates two bytes of storage with initial value specified (...) ---...--- Maria Pirsic IEEE Branch Treasurer 96/97 Carleton University (...) (28 years ago, 31-Mar-97, to lugnet.robotics.handyboard)
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| | Thanks to Chuck and Max
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Thankyou to Chuck and Max for the help with writing this code for reading square wave frequencies.If anyone else can use it here it is.Be careful though it resets the board every few seconds.I think that if this is a problem you could probably (...) (28 years ago, 31-Mar-97, to lugnet.robotics.handyboard)
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| | cancel from mail list
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Please remove me from the emailing list. Thank you Nathan Marcantel nathanm@mail.utexas.edu 512-272-8024 6517 Carisbrooke Lane Austin, TX 78754 (28 years ago, 31-Mar-97, to lugnet.robotics.handyboard)
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| | Re: AS11
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There is a command "DW" and "DB"? If so, what do they stand for? ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the Advancement of (...) (28 years ago, 31-Mar-97, to lugnet.robotics.handyboard)
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| | Re: AS11
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(...) FDB - Form Double Byte Constant (same as DW) FCB - Form Constant Byte (same as DB) (28 years ago, 31-Mar-97, to lugnet.robotics.handyboard)
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| | Digital Outputs (fwd)
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I'm interested in finding more on how I might digitally controll more devices from the HB. (...) (with some asm code) to drive TTL signals to the unused expansion header via A12 and A13 pins of the 6811. If this is possible.... What is envolved here (...) (28 years ago, 30-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar Multi-XDucer Design
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(...) There is currently no occurances of ranging circuits failing due to the use of the multi-xducer circuit. Care should be taken when using the circuit. Before any pings are done check that the mxducer circuit works (ie. SPI signals are (...) (28 years ago, 30-Mar-97, to lugnet.robotics.handyboard)
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| | AS11
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What does FDB and FCB stand for? ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the Advancement of Science and Art ---...--- (28 years ago, 30-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar Multi-XDucer Design
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Have you ever blown away a ranging circuit using this method? Or has anyone ever blown away their ranginf circuit by not connecting the transducer? ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (...) (28 years ago, 30-Mar-97, to lugnet.robotics.handyboard)
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| | QRD1114/QRB1114 Questions
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Hi all, I am looking at the small description of these part in Digikey cat., it indicates that they have optimum sensing distance at .15". Does this mean that these parts are not suitable for avoidance detection ? Does any one use the parts for such (...) (28 years ago, 30-Mar-97, to lugnet.robotics.handyboard)
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| | Re: IR concept
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Chuck, If you have the scematics for the IR sensor that uses the 555 and opamp, Iw oudl be interested in looking them over. I understand your theory, but the scematics would save me some time in ironing out the nitty gritty stuff. Thanks. (...) (28 years ago, 30-Mar-97, to lugnet.robotics.handyboard)
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| | Q1 on HB PCB
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HI, The Q1 (ztx614) is the last part i need to complete the board, i don't plan on using an IR Tx so do I really need Q1 the complete the board? also we have been using the 6811 EVM/EVB and UDLP in our lab classes and would like to know if i can (...) (28 years ago, 30-Mar-97, to lugnet.robotics.handyboard)
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| | Frequency counting
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I am having trouble getting my frequency counting code to work.The version I am posting is a sort of test and should print out a frequency integer in Hz after approximately one second of processing.Instead what it does is print out all the values of (...) (28 years ago, 30-Mar-97, to lugnet.robotics.handyboard)
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| | re: IR frequency (fwd)
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Connect the ground from the oscilloscope to the HB ground (anyone). Connect the V from the oscilloscope to the + end of the LED driver (or the annode of the LED if it's connected). Adjust the oscilloscope until you get a visible square wave (...) (28 years ago, 30-Mar-97, to lugnet.robotics.handyboard)
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| | (no subject)
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Hello! I would like to know something: Does anyone know how the LCD screen on the Handyboard opreates? More specifically: 1) does it have 8 in ports (kinda like the opposite of a P.C.'s parallel port?) 2) does it have a strobe (or respond pin ) that (...) (28 years ago, 30-Mar-97, to lugnet.robotics.handyboard)
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| | Q1 : ztx614
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hi, I have been working on the handy board for a couple of weeks now and I'm having problems finding the ZTX614 NPN darlington transistor, Digikey has them on back order until mid april. I was wondering if there is reason that it should be placed on (...) (28 years ago, 29-Mar-97, to lugnet.robotics.handyboard)
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| | my HB project
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Well, I just finished putting together my handyboard project. I thought maybe people would be interested in checking it out. It is a robotic camera moving thingy that is mounted on the front of my fish tank. It can move the camera horizontally so (...) (28 years ago, 29-Mar-97, to lugnet.robotics.handyboard)
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| | re: IR frequency (fwd)
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(...) signals at exactly 38KHz? somebody had suggested using an oscilloscope..but how do i go about it? (28 years ago, 29-Mar-97, to lugnet.robotics.handyboard)
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