 | | Re: BCD
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Mar, The half carry (H) bit in the CCR sets if there is a carry from bit 3 to bit 4: in other words when there is a carry from the low hex digit to the high hex digit. Only the DAA instruction is affected by the state of H. For example: LDAA #$5A (...) (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
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| | Re: BCD
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Yeah, it helps alot. Thanks. I guess the half-cary is for adding to the next significant 4 bit word. And the current word, including overflow, is then subtracted by ten (1010), if the half-carry is flaged, to yield the proper BCD word. Is this what (...) (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
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| | RE: LCD Panel Substitute
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|
I recently got mine from Marshall (www.marshall.com). When I ordered mine about a month ago, they had a bunch of them in stock. .... Jim Montague ---...--- From: Bill Conroy Sent: Wednesday, April 02, 1997 3:19 PM To: handyboard@media.mit.edu (...) (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
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| | LCD Panel Substitute
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I am having an extremely difficult time finding a source for the Hitachi 16x2 LCD panel. I am wondering what an appropriate substitute would be. I am looking at the following part from page 53 of the Mouser Electronics Purchasing Manual #58: Mouser (...) (28 years ago, 2-Apr-97, to lugnet.robotics.handyboard)
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| | Re: BCD [DAT]
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|
(...) As far as BSD goes; every decimal digit is represented by four binary digits: decimal BCD 0 0000 1 0001 2 0010 3 0011 4 0100 5 0101 6 0110 7 0111 8 1000 9 1001 so that a number like 3725 would be represented by 0011 0111 0010 0101 I've never (...) (28 years ago, 2-Apr-97, to lugnet.robotics.handyboard)
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| | BCD
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Does anyone know the details of how a BCD number is stored? I'm unsure as to what a "half-carry" is in HC11 CCR. It would be great if someone can provide a little example. :) ---...--- ericson mar Master of Engineering Candidate Project: Mobile (...) (28 years ago, 2-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Shaft Encoders
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One of the advantages of using a shaft encoder is: For you to get the same "resolution" as a shaft encoder with a potentiometer, you must have a very precise pot. Some optical encoders can have 500 "ticks". But... a normal encoder does not tell (...) (28 years ago, 2-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Robot classification
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Katt, Good question, and I liked Tom's response. If I may I'll add my two cents. From Tom's list: (...) Definitely and its not the kind of software they teach these days. When's the last time a program crash in your CS-101 class put a hole in the (...) (28 years ago, 2-Apr-97, to lugnet.robotics.handyboard)
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| | Shaft Encoders
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Does anyone see a problem with using the pot thats built in a RC servo as its shaft encoder. I have modified it so that it makes contact once every revolution. Would this mechanical contact create any "bounce" that would interfere with the enoding (...) (28 years ago, 2-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Robot classification
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(...) Kat, That question is one that a LOT of schools are asking right now. At the present time (in my opinion) it is a blend of different kinds of engineering, which is very much determined by the type of project that your doing. For example, (...) (28 years ago, 1-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Robot classification
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Katt97> What sort of engineering would robots, as a whole, be put in? Katt97> Or would robotics be considered a blend of different kinds of Katt97> engineering? -Kat Yup, blend. You got software engineering (art?) for the code to make it work. You (...) (28 years ago, 1-Apr-97, to lugnet.robotics.handyboard)
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| | Robot classification
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|
What sort of engineering would robots, as a whole, be put in? Or would robotics be considered a blend of different kinds of engineering? -Kat (28 years ago, 1-Apr-97, to lugnet.robotics.handyboard)
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| |
| | Piggybacked L293's on HB causing VR problems?
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|
One of our HB's has been "snake bit" for the last few weeks, exhibiting sporadic downloading problems, etc. We are running the piggybacked L293's (ala 6.270 board) on it, and the TI chips (non-piggybacked) on the others (which don't have problems). (...) (28 years ago, 1-Apr-97, to lugnet.robotics.handyboard)
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| | Re: AS11
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No, I didn't find an AS!! manual on the HB HP. Do you have one? Where did you get it from? It would really help. Though by now, I deciphered most of the language already. It still would be great to have as a reference. ---...--- ericson mar Master (...) (28 years ago, 1-Apr-97, to lugnet.robotics.handyboard)
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| |
| | (no subject)
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(...) PLEASE, when you want to share a large file with members of the handyboard mailing list, first ask who wants the file and then send it to *ONLY* those people. I was gone last week and unable to check my mail and when I came back I found that (...) (28 years ago, 1-Apr-97, to lugnet.robotics.handyboard)
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| | Re[2]: IR concept
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|
Chuck, I love the wire whisker! Have you got any more tricks and tips I could steal??? Richard ___...___ Reply Separator ___...___ Subject: Re: IR concept Author: cmcmanis@freegate.net at Internet-Mail Date: 29/03/97 00:58 Adam wrote: > An (...) (28 years ago, 1-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Digital Outputs
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|
Gordon, The steps on how to turn the SPI into 4 digital outputs are in the HB FAQ - off the top of my head I think it goes something like this.... poke (0x1009, 0x3c); /* set the 4 DDR bits for SPI (reg D) */ bit_set(0x1008, 0b00000100); /* set MISO (...) (28 years ago, 1-Apr-97, to lugnet.robotics.handyboard)
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| |
| | Re: Analog ports....
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To: Demian Bigelow <dbigelow@bu.edu> Subject: Re: Analog ports.... Cause I was wondering how well it works. To my understanding, analog phototransistors' outputs depend on intensity. I found that variations in the colors of surfaces reflect (...) (28 years ago, 1-Apr-97, to lugnet.robotics.handyboard)
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| |
| | Re: AS11
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You have an assembler manual? I only have the HC11 reference. Where do you get one of those? Thanks! :) ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering (...) (28 years ago, 31-Mar-97, to lugnet.robotics.handyboard)
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| | Servo encoder.
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Does anyone see a problem with using the pot in a modified servo and an encoder. I have modified it so that it makes contact once every revolution. Would this mechanical contact create any "bounce" that would interfere with the enoding ticks. (28 years ago, 31-Mar-97, to lugnet.robotics.handyboard)
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| |
| | connecting Scott edwards mini-ssc to handy board
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|
Hi, Does anyone have any insight to offer on connecting the HB to the scott edwards electronics mini-ssc servo controller? I wanted to connect directly to the HB through the onboard rj12 jack. Looking at the schematics It seems I might be able to (...) (28 years ago, 31-Mar-97, to lugnet.robotics.handyboard)
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| |
| | LM2931
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|
Is it allright if I replace the LM2931 on the Handyboard Interface/Charger Unit with 78L05 (same package)? (28 years ago, 31-Mar-97, to lugnet.robotics.handyboard)
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| |
| | re: IR frequency / o'scope adjustments
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|
(...) You want to trigger off of the signal, or maybe the line; the knobs to turn are generally marked "slope" and "level" or something close to this. I usually use a positive slope, I just like the signal to be going in a positive direction at the (...) (28 years ago, 31-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: Digital Outputs
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|
(...) Adam, Have you thought about using a some of the Motor Chip driver digital output lines(if you don't need two motor driver chips)? If you pull one of the L293 chips you can free up 4 digital output lines very easily. It would, of course, (...) (28 years ago, 31-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: AS11
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(...) DW - Define word (intel assembler) FDB - Form Double Byte Constant (motorola assembler) Example: (in HC11 memory order) ORG $100 DW $1234 DW $5678 Memory dump start at address $100, you will find: Address Data $0100 $12 $0101 $34 $0102 $56 (...) (28 years ago, 31-Mar-97, to lugnet.robotics.handyboard)
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| |
| | 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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| |
| | Re: Sonar Transducer Multiplexor
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|
(...) The OC is simply a protective buffer to the SPI pins. When the SPI feeds a low with a pullup resistor it must be able to sink the current drawn by the resistor. I read some of the docs on the SPI pinouts and ("M68HC11 Reference Manual" Serial (...) (28 years ago, 29-Mar-97, to lugnet.robotics.handyboard)
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| | Sonar Transducer Multiplexor
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|
In your BMP circuit diagram that you posted recently, why did you use an open collector to feed the base of the transistor? Would it work if you connected the digital signal directly to the base? ---...--- ericson mar Master of Engineering Candidate (...) (28 years ago, 29-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: IR concept
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|
(...) [Digitize the output from an IR LED with and without a signal present to achieve some common mode noise rejection.] This type of system is susceptible to being 'blinded' by high intensity IR sources (try it outside :-) I used a similar (...) (28 years ago, 29-Mar-97, to lugnet.robotics.handyboard)
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| |
| | u14
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|
I had trouble finding u14(LM 2931Z-5.0). I thought I might be able to use the 78LO5A that was suggested as a replacement on the mini board. When I try to test the voltage on pin 28 of U2 as described in part 2 of the assembly manual I get 6.3 volts. (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: IR concept
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|
In addition.... Perhaps I could use the on board IR header to turn on the 4 IR diode array with each diode in series with a current limit resistor and in parallel with the IR output header..?? (I think this has been suggested before.) (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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| |
| | IR concept
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|
An alternate IR system.... I've been scanning through some of the IR stuff to see if I can't pick out a good solid system for collision avoidance on a short range (approx. 6-10cm) scale, but everything seems like alot of trouble. Some guys at Humber (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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| |
| | re: IR frequency
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|
How do i find out the frequency of the IR signal emanating from the LED? Just by connecting the leads from the LED to a CRO ? (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Digital Outputs
|
|
I'm interested in finding more on how I might digitally controll more devices from the HB. From my current knowledge I was thinking it is possible (with some asm code) to drive TTL signals to the unused expansion header via A12 and A13 pins of the (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: IR for bots
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|
Hi Richard, I believe 50% duty cycle of on/off time is just an arbitary number which is easy to implement. You can change to any other number or even can be some sort of coding at the rate that is less than center freq. or carrier (38Khz here). (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: IR for bots
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|
(...) If you don't modulate the signal you run the risk of having another 40kHz signal (a.k.a. remoth control) trigger the reciever. If you modulate it and look only for you modulation code, then the chances of a stray signal are minimal. I have (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: IR for bots
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|
(...) Our robot worked well with a dual 555 timer. 38KHz for the IR and combined with a 500 Hz square wave. When the square wave was high, 38K was on, making it a 50% duty cycle transmission. As I understand the receiver circuitry, it was tuned to (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: IR Subsystem confusions.(Never Mind)
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|
Oh never mind my questions. I read the other messages after this one and looked it up too. It now makes sense to me. Sorry. ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Communicating through serial port
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|
Hi, I am trying to use the my handy board to communicate with an application on my computer by passing integers through the serial port. From my understanding, a binary subroutine must be called to access the serial port. Is this true? If so, why? (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: IR Subsystem confusions.
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|
Does the HB have demodulationg circuitry? According to the diagrams, the Sharp IS1U60 is connected to TIC1 on the HC11. Does this mean that the HC11 is doing the demodulation? Is the Sharp IS1U60 an IR demodulator, or simply and IR receiver? I (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: IR Subsystem confusions.
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|
(...) It is a useful for wireless communication (one way), beacon detection (the 6.270 boards used it for this) and for collision detection. (...) The part on the Handyboard has a 'center frequency' of 38Khz whereas the Radio Shack part has a center (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: IR Subsystem confusions.
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|
In your message you said: (...) main purpose: allowing HB's to transmit IR codes that can be rec'd by other HB's or circuits. example -> let an HB run an IR beacon that can be found by another HB. sub-purpose: run IR transmitters for reflective IR (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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| | Re: IR Subsystem confusions.
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|
(...) The handyboard consists of an IR transmitter and detector circuits. The purpose of the transmitter (when connected thru the infrared LED) is to produce infrared light waves at particular frequencies. This frequency is controlled by R4 and C6 (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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| | IR Subsystem confusions.
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|
What was/is the purpose of the IR Subsystem on the Handy board. What is the difference between the Sharp Demodulator and the one you get from Radio Shack. How do you use the onboard IR demodulator as a digital input. Are there different kinds of IR (...) (28 years ago, 27-Mar-97, to lugnet.robotics.handyboard)
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| |
| | (no subject)
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|
Thanks for the information. By the way, does the LCD output work the same way the parallel port on a P.C. Does? On a P.C., I believe it outputs like this: 1) out the coding for the letter in 1's and 0's in 8 positions (binary) 2) a line (I believe (...) (28 years ago, 27-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: SPI port config???
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|
Hi Adam, I am not certain by poking the register 0x1009 (or DDRD reg) alone could provide the clean work. The function of this register is also depending on SPE bit in the register 0x1028 (or SPCR) according to the manual. I believe you could (...) (28 years ago, 27-Mar-97, to lugnet.robotics.handyboard)
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| | SPI port config???
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|
Anyone.... This query pertains to the reconfig of the SPI on the HB done with a poke(0x1009, 0x3c) which turns the MISO, MOSI, SCK and SS into digital outputs. My question is: "What is the reverse poke if I wanted to turn the SPI back from digital (...) (28 years ago, 27-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: Mini Rebound RC
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|
(...) Just because the motors are small dosn't mean they don't pull a big load. Both Adam Cox and myself have been working with the bulldozer kit (from the robot store) and have found they really heat up the motor driver chips (TI SN754410NE). We do (...) (28 years ago, 26-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Mini Rebound RC
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|
check out www.robotstore.com and look under kits. There are gear kits and a bulldozer kit that I used two of for a robot. It is not too fast and it pulls a big load, doesn't pull much current (small motors). You might also try the manufacturers page (...) (28 years ago, 26-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: Analog ports....
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|
I was aware that IR sensors can only give digital (on/off) information. Using analog ports will not give you any extra information. Perhaps the ON voltage level of your circuit is lower that 5V and that each of your sensor circuits differ in such a (...) (28 years ago, 26-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: Neglection of U8 on Parts List
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|
Bill is right, U8 is a '374. Peter, where exactly are you looking that you don't see U8 listed? It's there at (URL) post URLs if you're trying to help me maintain the site. Thanks. -Fred In your message you said: (...) (28 years ago, 26-Mar-97, to lugnet.robotics.handyboard)
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| | Broken DS1233-10?
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|
Hello! I've started work on my Handy Board again, after a brief wait for the memory to arrive, and as soon as I plugged in the boad, I had a problem. I first noticed when I tried to put the board into bootstrap mode, as detailed at the end of (...) (28 years ago, 26-Mar-97, to lugnet.robotics.handyboard)
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| | Neglection of U8 on Parts List
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|
I am not sure how significant this is but page 35 of the assembly instructions lists U8 as a 74HC374 and not a 74HC373 chip as the sender indicates. (...) William F. Conroy III conroyw@acm.org Lt Col, USAF (28 years ago, 26-Mar-97, to lugnet.robotics.handyboard)
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| | Re: HB IR port
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|
Hi Terry, I believe the transmitter circuit already include the 40Khz carrier. You need to write code to modulate the carrier with the low frequency of your information that you want to transmit too. You can do it with simple on/off at the lower (...) (28 years ago, 26-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: Odometers
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|
"You pass this way but once, do it right" (...) Exactly the problem. So I've kind of rigged my motor code to take care to create more than 7 speeds. For instance, by alternating between to levels of PWM very quickly you can fake more motor speed (...) (28 years ago, 26-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: Flame detection (Cool Sensor....)
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|
(...) Yoni, (everyone else) An interesting site: www.infusionsystems.com These guys produce some interesting sensors. Cheers! (28 years ago, 26-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: Odometers
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|
(...) Tom, The problem most likely is not with the code but with the motor driver software. At the present time, the handy board motor driver routine only allows you to select from 7 power levels to the motor. With only 7 levels to choose from, you (...) (28 years ago, 26-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Mini Rebound RC
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|
I have seen alot of talk in the mail archives on converting RC cars (motors) and the jist i get is that they just draw two much current and are to fast. There is a smaller version of the Rebound RC car called the Mini rebound has anyone had any luck (...) (28 years ago, 26-Mar-97, to lugnet.robotics.handyboard)
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| | HB IR port
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Hello everyone, I'm interested in trying, possibly using the 40 Khz IR emitter port on the HB. What is required to activate it? If it is code driven, does it bog down the controller much? Also if it is code driven, does anyone have some sample? Is (...) (28 years ago, 25-Mar-97, to lugnet.robotics.handyboard)
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| | Neglection of U8 on Parts List
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Hi, I noticed that U8 was neglected from the parts list. If anyone was wondering you can get it from Mouser. The part number is 570-CD74HC373E. Attn: Fred you might want to update the parts list. Thank You, Peter Eacmen (28 years ago, 25-Mar-97, to lugnet.robotics.handyboard)
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| | Please repost Sample Sonar Schematic
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I deleted the message about the sample sonar schematic posted today in my mailbox after reading it since I thought it was also posted on the website. I couldn't find it, so can someone please repost it on this mailing list or send me the original (...) (28 years ago, 25-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Odometers
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Tom, What kind of encoders are inside these i.e., Hall Effect Sensors (magnetic), or IR LED emitters/detectors (optoelectronic)? Jose-Alfredo Esguerra WSU Mechanical Engineering Student Autonomous Mobile Robot Project (28 years ago, 25-Mar-97, to lugnet.robotics.handyboard)
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| | Digital Sensors & IR control (repost)
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Hi! I'm new on this list. I'm in the process of making what I hope will be an automonous mobile robot, controlled by the Handy Board. I want to add digital sensors to my program, and I've tried to do so, but the program unloads itself when I try to (...) (28 years ago, 25-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Please repost Sample Sonar Schematic
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It is now linked from the HB Software Resources page. -Fred (URL) I deleted the message about the sample sonar schematic posted today in my (...) (28 years ago, 25-Mar-97, to lugnet.robotics.handyboard)
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| | Digital sensors & IR control
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Hi! I'm new on this list. I'm in the process of making what I hope will be an automonous mobile robot, controlled by the Handy Board. I want to add digital sensors to my program, and I've tried to do so, but the program unloads itself when I try to (...) (28 years ago, 25-Mar-97, to lugnet.robotics.handyboard)
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| | digital and analog ports...
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Hello all, I've run into a small problem with some of my digital and analog ports. When I check their current values (analog(??) and digital(??)), some of the values change, and some don't. I've checked the IR sensors, and switched the good ones (...) (28 years ago, 25-Mar-97, to lugnet.robotics.handyboard)
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| | Analog ports....
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Hello to all, I've run into a small problem with my analog ports. I've got 3 IR transmitter/recievers hooked up to 3 ports, and the "levels" that they are reading is stuck. What I mean is that if I print out to the LCD screen the current values of (...) (28 years ago, 25-Mar-97, to lugnet.robotics.handyboard)
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| | Odometers
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Has anyone used odometers to make their bot drive in a straight line. I am trying to do this and it seems like the delay in reading the encoder values from 1 line to the next causes problems. I have tried taking two results after sleeping for 0.3 (...) (28 years ago, 24-Mar-97, to lugnet.robotics.handyboard)
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| | COX SERVOS
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I have a 10-14yrold COX micro servo that will rotate freely in both directions when applied straight DC. Does anyone know if these older servos operate differently than PWM. This would be a great solution vs hacking my new servos. (28 years ago, 24-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Adam's schematic / sending large files to the list
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Everyone.... I would like to take this moment to appologize to those who were inconvenienced by my email. It was only after I had sent it that I realized the implications. oops! I will, however, submit the code that I use (it's simple) and some (...) (28 years ago, 24-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Vector2X
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(...) I will try to get a package together tonight that will have to schematics, and the icb file as well as some C demonstration code. I thought I damaged my compass a week ago, but it turns out I broke a wire. I have a schematic, and all the (...) (28 years ago, 24-Mar-97, to lugnet.robotics.handyboard)
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| | Adam's schematic / sending large files to the list
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Hi all, a few reactions to Adam's multi-sonar schematic: * looks like a clever idea and it's an extremely clearly drawn schematic. I put a copy up at (URL) Adam, if you would ZIP up and e-mail me the code you use to drive this, along with any other (...) (28 years ago, 24-Mar-97, to lugnet.robotics.handyboard)
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| | System time &square waves
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I am still having trouble with the my program and thought that I might ask whether there is any code or does anyone know of a way to identify the frequency of digital square waves with the handy board. Joe Martin joema@mpx.com.au (28 years ago, 24-Mar-97, to lugnet.robotics.handyboard)
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| | Thanks.
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Hello, Thank you to everyone for all the help with the Handy-Board. In particular, thank you Fred Martin and Randy Sargent. Keep up the good work. -Luke (28 years ago, 23-Mar-97, to lugnet.robotics.handyboard)
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| | Re:Re:System time
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Pandit, It turns out that we where both wrong about your program.It does not work because the time over which d adds 1 to itself is not defined the program does not count at a rate of one unit per millisecond.I have in fact found that it will at (...) (28 years ago, 23-Mar-97, to lugnet.robotics.handyboard)
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| | Re: your mail
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The LCD pins are just the databus, and some strobes. No power here, just information. And not much possibility for PWM either, since databus timing is constrained by the CPU bus timing. Best to hook something stuctured to the databus, ie the (...) (28 years ago, 23-Mar-97, to lugnet.robotics.handyboard)
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| | Re: your mail
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What is it that you want to accomplish by doing this? Drive your motors? According to the CPU and Memory diagram, the LCD control lines come directly from the HC11 microprocessor. The voltage is generally about 5 or so, but the lines cannot output (...) (28 years ago, 23-Mar-97, to lugnet.robotics.handyboard)
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| | (no subject)
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HI! I had an Idea..... What would happen if I were to wire some motors to the LCD output (to screen)? But for me to really do that, I need a couple of things answered: 1) How many volts does it run at? 2)Did anyone ever try this? Advice? Thanks.... (...) (28 years ago, 22-Mar-97, to lugnet.robotics.handyboard)
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| | Vector2X
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I have just recvd and read over the docs of my newly acquired Vector2X compass. I would greatly appreciate any assistance that an experienced user might have to offer. Although it looks as though the wiring overhead is minimal, I would like to (...) (28 years ago, 22-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Runtime Error 3
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Peter, Are you familiar with C in general? I think if you put a static value in the [] of the array declaration and fix the increment of f (f+1) to f++ or f=f+1, then you'll be OK. Try it. ---...--- Adam B. Cox check out my web page Computer (...) (28 years ago, 22-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Re:Re:System time
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Hi Joe, I kind of guess that this result will come up as I mentioned that I do not fully understand the intention of the program. I would suggest that you put sleep(onemilisec); in the time keeping process it self in side the while(1) loop for the (...) (28 years ago, 22-Mar-97, to lugnet.robotics.handyboard)
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