 | | Newbie
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Hey all! I just got my handyboard in the mail today, and am ready to start playing! Can any of you tell me if there is a reference somewhere that explains how to get started (ie sample programs)? Thanx Charlie (28 years ago, 15-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Handyboard Serial Communications
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After parsing the Handyboard mail archive, it sounds like what I need is the SPI port. Unless someone has other advice, I'll research this path. At this point, my overall plans are to construct my 'Bot as follows: 1. Use the Handyboard for motor (...) (28 years ago, 14-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Handy Board and 6 legged bots.
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(...) No problem at all. You connect two boards to the same serial line and there is a jumper on the SSC which configures it for either servos 0-7 or servos 8-15. When you send a command to set servo 15 to position 87 it "does the right thing". The (...) (28 years ago, 14-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Handy Board serial routines
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(...) /* ---...--- SENDING AND RECEIVING THROUGH THE SERIAL LINE ---...--- the IC program must be stopped in order for this to work ! the code is from the handybaord FAQ by Fred Martin or ?? Randy Sargent ?? added by Xavier Chabot, 3-3-97: (...) (28 years ago, 14-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Handy Board and 6 legged bots.
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Greetings, The serial port could be used after downloading the program code into memory for other purposes (such as controlling the mini-ssc board). However, I have not found any reference to RS-232C port IC commands, so one would have to build (...) (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Handy Board and 6 legged bots.
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I would love to be able to use serial controlled boards with the Handyboard. Given that it only has one serial port which is used for programming, won't this be a problem? (...) (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Handy Board and 6 legged bots.
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Scott Edwards makes a nice board called the mini-ssc which takes a serial RS232 signal and drives 8 servos. You can chain two of these for the capability of driving 16 servos. I've used one and it works quite well and is very small and light. Cost (...) (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Handy Board and 6 legged bots.
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I understand the handy board has motor drivers for wheeled applications, but what about 6 legged robots. These use 12 PWM servos. How can the handy board be used to control a 6 legged critter? (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Mailing List
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Please subscribe me. Thanks. (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Newbie
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Hello! I am a high school senior working on a project for Tech Challenge '97 here in San Jose, California, and my team has decided to use the Handy Board as our processing/control device. I have a few questions With a basic HB, could we run (2) (...) (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Re: IR Collision avoidance
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(...) Resistors in series with LEDs are generally current limiters, meaning that the LED is very low resistance when conducting, so the resistor is the determinant of current flow. With the little colored LEDs I teach my students to hook up a 1K pot (...) (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Servos
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I have tried to use my servo with the HB, but the icb that I have does not reflect the documentation in given in the HB manual that I have. There is reference made to servo_on() and servo_deg() which is not in the icb file that I have of the servo. (...) (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Ascii to integer...
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Is there any function to convert Ascii to integer on the Handyboard? Yours Jon ---...--- Web : (URL) : (URL) jonko@gyda.hiof.no ---...--- (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | High amperage charge
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I have read in the HB Manual that people have experienced difficulty when useing high amperage transformers to charge the HB.I am interested in chargeing the HB with a 12 volt automotive circuit.Is this possible. Yours sincerely Joe Martin (...) (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Flame detection
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What are some common methods people use to detect candle flames in a room filled with flourecent and/or halogen lights? THat is, what does one use to differentiate between ambient and flame lights??? Sincerely, Yoni Garbourg << To succeed, Atificial (...) (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | ds1233-10
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I have had trouble finding this part(DS1233-10). Does anyone know the properties of this part or an acceptable replacement? Jim Hamilton (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Re: IR Collision avoidance
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(...) My question is...in the first diagram (below) the resistance is 220 ohm ie 0.2KOhm But in the second diagram the resistances are 2.2KOhm Which is the correct one? ---...--- (...) (28 years ago, 12-Mar-97, to lugnet.robotics.handyboard)
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| | Re: 100 sensors
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(...) A resistor ladder is simply several resistors, connected in series with a switch between each one. On the handyboard you would do something like this: VCC ---\/\/\/---\/\/\/--.../---...--- | | | | | | \ SW1 \ SW2 \ SW3 \ SW4 \ SW5 | \ \ \ \ \ (...) (28 years ago, 12-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Spike protection
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Terry, If you have the L293D or the SN754410 motor driver chips, then the diodes are present. - Prabal (...) (28 years ago, 12-Mar-97, to lugnet.robotics.handyboard)
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| | ztx614
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Digikey is out of stock of the ztx614 transistor. Can anyone tell me another supplier for this transistor? Can I substitute a different transistor? If so, which one(s) would work? Thanks! .... Jim Montague (28 years ago, 12-Mar-97, to lugnet.robotics.handyboard)
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| | Spike protection
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Does anyone know if the motor ports on the HB are spike protected? I would like to actuate a relay from a motor port. Normally a diode across the coil kills the spike, but I was wondering if the drivers on the HB already handle that. Thanks, Terry (...) (28 years ago, 12-Mar-97, to lugnet.robotics.handyboard)
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| | Re: 100 sensors
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What's a resitor ladder? Is there a textbook or something where I can get a schematic? Is is same as a D-A converter? ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of (...) (28 years ago, 12-Mar-97, to lugnet.robotics.handyboard)
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| | LCD and interrupts
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(...) Actually, that's not quite true. The systick interrupt always runs, and LCD writing happens as _part of_ systick. Any interrupt, by default, disables further interrupts until it's done. Systick is actually different, because it re-enables (...) (28 years ago, 11-Mar-97, to lugnet.robotics.handyboard)
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| | Re: non-linear motor speed problem
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(...) Several reasons. Understand that PWM has the effect of controlling the amount of power fed to the motor, power is related to current in a quadratic (p = i^2r), and your current is related to the voltage applied and the motor parameters (...) (28 years ago, 11-Mar-97, to lugnet.robotics.handyboard)
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| | Re: non-linear motor speed problem
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(...) The (small) load presented by the gears makes it behave quite well with pure DC (...) Sadly, the servo motors have oodles of oomph (the correct technical term for torque etc). My little bot is really a micromouse in training and very light so (...) (28 years ago, 11-Mar-97, to lugnet.robotics.handyboard)
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| | Re: non-linear motor speed problem
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The test isn't fair under no-load conditions, because then the motor just spins when you give it any signal. Are you sure the performance is the same when you have a full operating load? This would not make sense; I would guess that this would mean (...) (28 years ago, 11-Mar-97, to lugnet.robotics.handyboard)
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| | non-linear motor speed problem
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I am using servos converted to plain gearmotors as the motive power for my baby bot. Finally I worked out how to add shaft encoders to them. (Found a small opto switch to poke through the inside of the case on the first gear). The servos I am using (...) (28 years ago, 11-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Problems with my DC-Motors
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(...) Yes, i do / Ja ist schon gut :-) (...) Here i suspect your speed regulator chip. (...) Servo's brauchen nur ein wenig strom -> i really suspect your speed regulator chip. (...) Try swapping your speed controller chip. Groetjes, Hans (28 years ago, 10-Mar-97, to lugnet.robotics.handyboard)
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| | Re[6]: IR Collision avoidance
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Adam, I have it working, but I want to tidy it up a bit. At the moment it uses 2 op-amp stages, I think it can work with one. After all, it's just a precision diode! I will put something on in a few days. Fred, I do not have schematic capture (...) (28 years ago, 10-Mar-97, to lugnet.robotics.handyboard)
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| | Re: IR collision avoidance
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Some IR Leds have graphs from the manufacturer showing angular characteristics. I've seen some nice ones in linear and polar plots of angle vs. intensity. See if you can get the specs of the LEDs you order. This may help you with your configuration. (...) (28 years ago, 9-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Breaking
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I've slammed it backwards a couple of times. ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu Department of Mechanical Engineering The Cooper Union for the Advancement of Science and Art ---...--- (...) (28 years ago, 7-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Re[4]: IR Collision avoidance
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Richard, Please send me the schemtics on the $2 circuit and whatever else I need to know to get this thing up and running. I would appreciate this very much. Thanks. (...) (28 years ago, 7-Mar-97, to lugnet.robotics.handyboard)
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| | IR sensors
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Is there any sort of "pre-built" IR module to interface IR to the handyboard. Perhaps a schematic or something? Thanks ---...--- Adam B. Cox check out my web page Computer Engineer (URL) Communications Corp. vmail: 416-241-7000 (x224) ---...--- (28 years ago, 7-Mar-97, to lugnet.robotics.handyboard)
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| | Problem with H-Drives
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I've been having problems with the Handy Board being able to go into download mode. It seems to work fine without any motor drivers connected, and with one driver chip plugged into one side of the board, it also seems to work, but still not (...) (28 years ago, 7-Mar-97, to lugnet.robotics.handyboard)
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| | vector2x
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Does anyone have schematics or know where I can download schematics on the hookup of the v2x compass? Thanks. ---...--- Adam B. Cox check out my web page Computer Engineer (URL) Communications Corp. vmail: 416-241-7000 (x224) ---...--- (28 years ago, 7-Mar-97, to lugnet.robotics.handyboard)
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| | Re: SPI & Vector2x
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(...) Maybe, it'll depend on the flooring. I think re-bar in a concrete floor might affect a compass too close to the floor. Last night I was playing with the compass, and found that passing a screwdriver within about 3 inches would affect the (...) (28 years ago, 7-Mar-97, to lugnet.robotics.handyboard)
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| | Preprocessor for DOS or Windows or '95?
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Hello, I want to use assembler in conjunction with IC, as described in the handyboard technical reference. Apparently this needs a preprocessor. Does anyone have such a thing, or know how to kludge it, or even what it does so I can try to write (...) (28 years ago, 7-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Re[2]: phone cord length
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thx for correcting my wording. e.g., instead of saying "half twist" i should say "straight through". anyhow, we agree on the definition of what is a phone cable and what is not a phone cable, we just have a different way of illustrating it. the (...) (28 years ago, 7-Mar-97, to lugnet.robotics.handyboard)
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| | Breaking
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I was wondering what methods of breaking have been used with handyboard motors. Is it OK just to slam them in reverse for a few milliseconds ? Or will the large current impulse be harmful to the motor and driver chips ? It looks like the breaking (...) (28 years ago, 7-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Re[2]: phone cord length
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Sorry Fred, but I must respectfully disagree..... Fred G. Martin wrote: (snip) (...) Actually it is phone cords which are the crossover type. Use of a patch- cord tester confirms this. I am not familiar with any RJ11 network cables, but I know that (...) (28 years ago, 7-Mar-97, to lugnet.robotics.handyboard)
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