 | | Does Karl Lunt's SBASIC work with HB?
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Hi all, I just read a great article from Karl Lunt in a robotics magazine about beginning programming (exactly where I am) and the 68HC11. He mentioned that he has a basic compiler that you can download from his site. Does anyone know if this will (...) (26 years ago, 29-Sep-98, to lugnet.robotics.handyboard)
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| | nvram
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is it posible to use an NVRAM lets say dallas a 32K in place of the regukar RAM to load the program and run it from there with out having to continually loading it?? thanks in advance FRED (26 years ago, 29-Sep-98, to lugnet.robotics.handyboard)
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| | Multi dimentional Arrays
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Hi All, I am trying to write a code for fuzzy logic and using Matrix havig a size of 10X10, but it gives an error (stack overflow). When i reduce the size of matrix to 6X6 it works perfectly.I am using IC 3.0. Can I use a matrix having a size (...) (26 years ago, 29-Sep-98, to lugnet.robotics.handyboard)
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| | Down loading IC
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Help please, I have just bought a pre-assembled Handy board, powered it up connected it to com2 on a dos PC and successfully downloaded IC. The problem now is that after that I disconnected all power to the board(including batteries), powered the (...) (26 years ago, 29-Sep-98, to lugnet.robotics.handyboard)
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| | Re: HB Serial Communication
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yes, but you have to use the atypical "network style" cable if you are plugging two HB's together. see (URL) more info. f. In your message you said: (...) nt's serial code? (...) een two HBs and one of them turned off and smoke came from around the (...) (26 years ago, 29-Sep-98, to lugnet.robotics.handyboard)
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| | Running Assembly Programs
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I am taking a course on HC11 assembly. I wanted to know how I can use the Handyboard (and/or the Miniboard, I have both) in this class. The course uses the Mot EV board and they use the PCBUG11 for everything. Please tell me the procedures and the (...) (26 years ago, 29-Sep-98, to lugnet.robotics.handyboard)
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| | HB Serial Communication
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Hi, Is it possible for 2 HBs to communicate via the serial port using Randy Sargent's serial code? ((URL) not too smart in electronics so I plugged a standard telephone cable between two HBs and one of them turned off and smoke came from around the (...) (26 years ago, 28-Sep-98, to lugnet.robotics.handyboard)
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| | Re: My reset blues
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I had the same trouble with the reset thing. In the manual it states that resetting the board is simply turning the board on and off, this should work. I've had the same trouble you've had. The thing that was impeding me was the fact that I was (...) (26 years ago, 28-Sep-98, to lugnet.robotics.handyboard)
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| | Help with electronic components.
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Bonjour from france, I am a french user of the handyboard. I work in computing but I don't know many things about electronic (a minimum). I bought my HB by Gleason Research with the "Sensor/Motor Kit" and I first did a LEGO based robot. I am now (...) (26 years ago, 28-Sep-98, to lugnet.robotics.handyboard)
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| | +5v power supply dilemma
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I have been attempting to run a circuit of my own design which requires both a 9.5-14v DC supply and a 5v DC supply from a 9.6v NiCad. I run the 9.6v straight to the part of the circuit which requires that voltage and that works fine. I then take (...) (26 years ago, 28-Sep-98, to lugnet.robotics.handyboard)
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| | Controlling motor speed/frequency
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hi all does anyone know if there is a way where we can increase the output frequency of the motor PWM output? i did a test by typing " motor(0,50) " and connecting a probe to Motor 0 +ve and to the L293D gnd pin respectively. the reading on the (...) (26 years ago, 28-Sep-98, to lugnet.robotics.handyboard)
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| | Re: Handy Board newbie looking for ways to expand digital I/O
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Try this: (URL) for up to 3 more 8 bit ports identical to the motor one. Thanks, Joe Hoffmann E-Mail jhoffman@it.sait.ab.ca (...) (26 years ago, 27-Sep-98, to lugnet.robotics.handyboard)
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| | My reset blues
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Hi all, I have problems running my program after downloading it to my HandyBoard. After what Maz Rahm (thank you very much Maz Rahm) replied to Keith (thanks to you too Keith) that in order for the program with the main function in it, to run, I (...) (26 years ago, 27-Sep-98, to lugnet.robotics.handyboard)
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| | Handy Board newbie looking for ways to expand digital I/O
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Hi all, I've started playing with the Handy Board last week and needed more digital outputs then provided. After a quick look at the schematics, FAQ's and the manual, I decided to disable the motor circuitry and use the latch mapped to address 0x0e (...) (26 years ago, 27-Sep-98, to lugnet.robotics.handyboard)
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| | Re: IC for the Commodore 64?
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(...) Damn! I can't laugh. :) .---...--- . . . | Remi Desrosiers | "My Youth in Arcadia" ICQ# 7228856 | harlock@videotron.ca . remi.desrosiers@polymtl.ca . . (26 years ago, 26-Sep-98, to lugnet.robotics.handyboard)
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| | Penn State TrailBlazers Contest
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Hi, If you are a student robot builder in the Philadelphia area (or anywhere for that matter), you may want to check out our new robot contest scheduled for Sat, Dec 5, 1998 at the Penn State Abington location. It is called "Robo-TrailBlazers" It (...) (26 years ago, 26-Sep-98, to lugnet.robotics.handyboard)
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| | IC for the Commodore 64?
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Don't laugh, but is there a version of Ic for the C-64? ---phil (26 years ago, 26-Sep-98, to lugnet.robotics.handyboard)
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| | Re: Multitasking problems
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(...) <snip> (...) I think I know what the problem is: Putting a start_process statement inside a loop like that is going to end up starting so many processes that the stack fills up almost instantly. I think you probably only need a single IRCheck (...) (26 years ago, 26-Sep-98, to lugnet.robotics.handyboard)
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| | Multitasking problems
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HELP!! I keep getting this message whenever I try to multitask with my board: "Not enough stack memory for new process while executing main (process # 1)" The only things loaded are the hb libs, my code and the sony ir routines totally nowhere near (...) (26 years ago, 26-Sep-98, to lugnet.robotics.handyboard)
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| | Re: HB controlling robot.
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I had the same trouble, all you have to do is specify a main() function in your ".c" file example: void main() { fd(1); msleep(100L); off(1); } this function will run once the handy board is turnned on. (...) a (...) and (...) to have (...) time. (...) (26 years ago, 26-Sep-98, to lugnet.robotics.handyboard)
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| | Re: HB controlling robot.
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(...) without (...) Really simple. 1. Write code using Interactive C 2. Download code to Handyboard 3. Either run main() from IC or reset the board (cycle power) 4. Unplug the cable between board and PC Congratulations, your robot is now running (...) (26 years ago, 25-Sep-98, to lugnet.robotics.handyboard)
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| | [Sensors Inputs]
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Hello all, i'm developing my MicroMouse robot with the HandyBoard and i was thinking about having 12 IR analog sensors (from Quality Technologies - QRD 1114). However, the HB suports only 7 analog input sensors. So, is there any way that i can use (...) (26 years ago, 25-Sep-98, to lugnet.robotics.handyboard)
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| | HB controlling robot.
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Dear all, I just obtained a HB and I would like it to control my robot. This is the situation: The robot is currently functioning ok and it is controlled by a 16-bit microcontroller, all the motions can be controlled simply by giving it a command (...) (26 years ago, 25-Sep-98, to lugnet.robotics.handyboard)
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| | Re: fred please help
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1. when you say "lights stay on," are you specifically referring to the SER and PWR LEDs by the two buttons? because the motor LEDs may be on or off, it doesn't matter, before the bootstrap download. 2. assuming yes, you are talking about SER and (...) (26 years ago, 25-Sep-98, to lugnet.robotics.handyboard)
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| | Re: Motor Output
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REF: PWM control of 4A, 12 VDC motors with an LMD18200-based H-bridge HandyBoard Greetings, Two LMD18200s apparently can be 'bridged', being then capable of currents of 6A (average) and 12 A (peak). This information is based on specifications (...) (26 years ago, 25-Sep-98, to lugnet.robotics.handyboard)
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| | Re: Motor Output
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(...) hehehe!! Have you ever tried to do PWM with a relay? ;) Sounds like a buzzer... and is not quite healthy for the relay... Use LMD18200!!... altrough they are limited to 3A with a 5A peak... Can somebody tell us if we can put two LMD18200 in (...) (26 years ago, 24-Sep-98, to lugnet.robotics.handyboard)
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| | Re: Motor Output
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(...) The solution is really simple. All you have to do is run the power from the motor outputs to a relay. This relay will activate another circuit (an automatic switch with power detected from motor outputs)which has your 12DC 4A motors AND it's (...) (26 years ago, 24-Sep-98, to lugnet.robotics.handyboard)
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| | fred please help
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I just bought a pre-assembled Handyboard. And I am about to explore it. Already I am having problems. I am trying to go into the bootstrap download mode as described in the manual, but it doesnt work. I turn off the handy board, hold down the STOP (...) (26 years ago, 24-Sep-98, to lugnet.robotics.handyboard)
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| | Motor Output
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Dear All, I've problem trying to power 12V 4A DC motors directly from HB. 1) Has anyone try this (4A) with TI SN754410 (piggy back them) ? 2) How do I connect the external diode to L298 ? Regards, keong :-) (26 years ago, 24-Sep-98, to lugnet.robotics.handyboard)
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| | multitasking, and sonar sensors
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I've read through the maunual for the Handy Board, and I am aware that the handy board has multitasking capabilities. The manual says that the function: start_process(...) is the function to use to have the handy board multitask. WHERE is this (...) (26 years ago, 23-Sep-98, to lugnet.robotics.handyboard)
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| | PID control
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Hello. I am looking at using my Handyboard to do PID control of a motor, with the feedback coming from one of the analog inputs. From what I understand, tuning the control is the most difficult part. Has anyone tried this with the Handyboard, have (...) (26 years ago, 23-Sep-98, to lugnet.robotics.handyboard)
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| | Fire fighting robots
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I'm doing a project for school. I'm buiding a fire fighting robot and I need to do research on what other people have done in the past with fire fighting robots. For example the Trinity College contest, if there's a URL please E-Mail it to the list. (...) (26 years ago, 23-Sep-98, to lugnet.robotics.handyboard)
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| | Re: Digital Output
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Check out: (URL) Hoffmann E-Mail jhoffman@it.sait.ab.ca (...) (26 years ago, 22-Sep-98, to lugnet.robotics.handyboard)
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| | (no subject)
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Synchronizing with board Pcode version 3.10 present on board Loading C:\IC 3.2\libs\lib_hb.lis. Loading C:\IC 3.2\libs\lib_hb.c. Initializing interrupts Downloading 1175 bytes (addresses 8000-8496): 1175 loaded Downloading 70 bytes (addresses (...) (26 years ago, 22-Sep-98, to lugnet.robotics.handyboard)
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| | Re: Serial input
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The problem is that I am already using the console port to communicate to a pc. What I would like is to have one or more devices communicate back to the handyboard then the handyboard communicate to the pc. On the home page there is link to "9600 (...) (26 years ago, 22-Sep-98, to lugnet.robotics.handyboard)
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| | Re: Serial input
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the only easy way to get a serial input is to take over the console port used by IC. this isn't hard to do, but you lose the ability to interact with the board via IC while your board is running your code which is tlaking to the alternate serial (...) (26 years ago, 22-Sep-98, to lugnet.robotics.handyboard)
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| | Digital Output
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Hi, I am working on a totally autonomous sumo wrestling robot, using the HB as its brain. I have interfaced sensors to it, and even designed a high current motor driver circuit to directly interface to the existing L293D inputs (Info available on (...) (26 years ago, 22-Sep-98, to lugnet.robotics.handyboard)
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| | Serial input
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I am working on a project that requires serial output devices, I would like to connect these to the digital inputs. Is there anyone that has some routines (preferably ic funtions) that I could have that do this. Is there a way to use the SPI port to (...) (26 years ago, 21-Sep-98, to lugnet.robotics.handyboard)
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| | help!
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Dear hb-fans, I'm currently trying to use the handy board to run a 12-legged robot. I've tried to power the motors directly from the hb motor output but apparently the current supplied is too low. Is there any simple method of powering my motor and (...) (26 years ago, 21-Sep-98, to lugnet.robotics.handyboard)
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| | newbie needs help.
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I just bought a pre-assembled Handyboard. And I am about to explore it. Already I am having problems. I am trying to go into the bootstrap download mode as described in the manual, but it doesnt work. I turn off the handy board, hold down the STOP (...) (26 years ago, 21-Sep-98, to lugnet.robotics.handyboard)
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| | stepper motor speed
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Hi, Recently, I have connected the wires out from the 4 motors ports on the HB and then directly connected to the driver L298.Next, the o/p of L298 is connected to the stepper motor which drawn 3A. I supply 4A parallel to the 2 motors. Hence, each (...) (26 years ago, 20-Sep-98, to lugnet.robotics.handyboard)
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| | Re: lcd screen pinouts
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the LCD should work fine. On the HB, pin 1 is on the top left, and pin 14 is on the top right. Just hook them up in order and you're all set. Fred In your message you said: (...) (26 years ago, 18-Sep-98, to lugnet.robotics.handyboard)
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| | lcd screen pinouts
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Hi I have purchased an lcd screen for the handyboard, however it's not the ridji-dij lcd. The pinouts are as follows pin symbol function 1 Vss 0v 2 Vdd 5v 3 Vo contrast adjustment 4 RS register select 5 R/W read/write 6 E enable signal 7 DB0 databit (...) (26 years ago, 18-Sep-98, to lugnet.robotics.handyboard)
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| | Handy Board expansion board
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As I am new to this mailing list, I wondered if anyone could tell me if it is possible to obtain expansion board pcb's, or is it still at the beta testing stage. Looking at the web pages it seems to give several more outputs/inputs. Any more info on (...) (26 years ago, 18-Sep-98, to lugnet.robotics.handyboard)
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| | Card readers
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Is there anyone familliar with magnetic card readers, I would like to know where I could get some information on them (communications, etc...) Thanks, Joe Hoffmann E-Mail jhoffman@it.sait.ab.ca (26 years ago, 15-Sep-98, to lugnet.robotics.handyboard)
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| | Re: <obstacles>
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Ok. If you used 2 motors in m1(right) & m3(left) , and your sensor was at the front (and only one), and in port 15, a short program for running it could be: /*Start of avoid.c */ void main(){ while(1){ /*Puts program in an infinite loop*/ fd(1); (...) (26 years ago, 15-Sep-98, to lugnet.robotics.handyboard)
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| | Re: Re: <obstacles>
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I don't really know how to explain finite state machines (FSMs) or parse trees...(I'm not in computer science...) but my artificial life class's homepage is still up and the text is available through it in post-script format ((URL) everyone that (...) (26 years ago, 14-Sep-98, to lugnet.robotics.handyboard)
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| | Re: WARNING: +5 supply exposed
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I got my PCB from Miranda Robotics (mail to colin@prospero.u-net.com for more information) in England, and the trace is fully covered. Apperently, not al HandyBoard PCB's ar exactly the same. Thanks for the tip anyway. Jeroen van der Vegt. (...) (...) (26 years ago, 14-Sep-98, to lugnet.robotics.handyboard)
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| | Handyboard on 9V battery?
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Can it be done? I'm using the Handyboard to control my hexapod robot and weight is a problem. At the moment I have 8 AA batteries connected which are not particularly weight light. I'm not using any of the motor driving functions of the board, just (...) (26 years ago, 14-Sep-98, to lugnet.robotics.handyboard)
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| | Re:
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(...) There's many ways you can approach obstacle avoiding. There are neural nets, evolutionary code (incl. genetic programming and genetic algorithms), finite state machines, and there's hard-coding it into the program (which, of course is no fun (...) (26 years ago, 14-Sep-98, to lugnet.robotics.handyboard)
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| | (no subject)
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Hi,all I am trying to write neural-fuzzy code for avioding of obstacle. I am using handy board. I never wrote a code for fuzzy logic. can anybody suggest me any good site on web for fuzzy logic or any book or any code which he has written. Thanks in (...) (26 years ago, 14-Sep-98, to lugnet.robotics.handyboard)
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| | Manual reading
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Hi, Besides the source of manual on Interactive C from the internet, Is there any other sources on the IC software for me to find out more on IC , Eg book ? There are a lot of text book concern the software like C++, java , how about Interactive C . (...) (26 years ago, 12-Sep-98, to lugnet.robotics.handyboard)
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| | WARNING: +5 supply exposed
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Take a moment to look at your Handy Board. There is a thick trace along the top, right and bottom edge. This is your regulated +5 line. Now look very closely at the outer edge of this trace. It should be completely green (covered with solder mask). (...) (26 years ago, 12-Sep-98, to lugnet.robotics.handyboard)
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| | WARNING: +5 supply exposed
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Take a moment to look at your Handy Board. There is a thick trace along the top, right and bottom edge. This is your regulated +5 line. Now look very closely at the outer edge of this trace. It should be completely green (covered with solder mask). (...) (26 years ago, 12-Sep-98, to lugnet.robotics.handyboard)
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| | My problems with digital outputs
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Dear Mr Fred Martin, My project requires digital outputs and does not need to have motor outputs. I have also read your FAQ and one of them states that by adding a hc374 IC chip in a similar fashoin to the one driving the motor circuits, and (...) (26 years ago, 12-Sep-98, to lugnet.robotics.handyboard)
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| | Re: analog problems
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Dear Sam, It is so strange as you already replace all the chips. The "testanalogs()" is used to test A/D feature and analog port of MC68HC11. It will prompt you "Press START to test knob..." You then press START button and the reading of A/D port (...) (26 years ago, 12-Sep-98, to lugnet.robotics.handyboard)
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| | analog problems
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I am building my handyboard and have been unable to succesfully execute testanalogs(). testmotors(); and testdigitals(); work but when i testanalogs(); either the board displays the current position of the knob (1-256) and freezes, displays the (...) (26 years ago, 11-Sep-98, to lugnet.robotics.handyboard)
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| | Re: Ramping up and down.
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(...) Not quite, but I made good use of the PWM to provide automatic, feedback-adjusted motor control for straight-line tracking. It might give you some ideas. My 'bot uses differential steering (it looks like a small wheelchair) and used to cruise (...) (26 years ago, 11-Sep-98, to lugnet.robotics.handyboard)
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| | Re: Difference between designer and OEM Polariod kit
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(...) The OEM kit contains two transducers and two ranging circuit boards for about a hundred bucks or so. The designer kit contains only one each of the above, plus an experimental demonstration board with a digital display and driver circuitry, (...) (26 years ago, 11-Sep-98, to lugnet.robotics.handyboard)
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| | Ramping up and down.
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Does anyone have any code using the new smooth PWM motor routines to ramp up and ramp down the speed. I have tried a few things with out much successs. Thanks Bill James | work: 972.480.2306 Product Test Specialist | Pager: 972.598.6201 (...) (26 years ago, 10-Sep-98, to lugnet.robotics.handyboard)
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| | Difference between designer and OEM Polariod kit
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Hi, What's the difference between the Designer and OEM polaroid kits. Which one do I need to hook up the polaroid sensors to the HB? Thanks (26 years ago, 10-Sep-98, to lugnet.robotics.handyboard)
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| | Questions for Fred
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I guess I should have learned by now, to investigate more before jumping out and asking. I examined the two versions of the lib_hb.c the difference in the analog is the absence of the following code in the smooth pwm code: int _raw_analog(int port) (...) (26 years ago, 10-Sep-98, to lugnet.robotics.handyboard)
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| | Questions for Fred
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Fred, or who every can answer this. I have implemented the smooth PWM routines and are very happy with them. I notice now that there is a fix for the analog sensor reading bug. One file that is replaced is the lib_hb.c file, which was also the file (...) (26 years ago, 10-Sep-98, to lugnet.robotics.handyboard)
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| | Re: bootstrap mode in assembling the HB
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yes, RP4 is four isolated resistors, and this being part of the serial line circuit, definitely explains your problem if you are using the common-terminal style. you can just install four 1K resistors if you don't have the correct r-pack handy. fred (...) (26 years ago, 9-Sep-98, to lugnet.robotics.handyboard)
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| | bootstrap mode in assembling the HB
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hi At present I am up to section 4.4, "serial line and stop switch". I have installed all the components as per the section but when testing by applying power and holding down the stop switch, the HB will not go into bootstrap mode. I have not (...) (26 years ago, 9-Sep-98, to lugnet.robotics.handyboard)
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| | Fw: Current Rating use on HB
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(...) that (...) (26 years ago, 8-Sep-98, to lugnet.robotics.handyboard)
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| | encoder use in stepper motor
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hi, How can i use my self build encoder to locate the position when my robot reach a position ? Is it suitable to use a self build encoder together with the stepper motor? The self build encoder consists a photoelectric reflector sensor mounted (...) (26 years ago, 8-Sep-98, to lugnet.robotics.handyboard)
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| | Re: IC dip 120 or Ic dip 210
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(...) (26 years ago, 8-Sep-98, to lugnet.robotics.handyboard)
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| | Current Rating use on HB
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Hi, What is the current rating allow to be use on the HD if currently I am using a stepper motor of rating 4.5V and current 3Amp ? Is it all right directly plug it into the HB? How should I increase the acceptable current rating on the HB? How (...) (26 years ago, 8-Sep-98, to lugnet.robotics.handyboard)
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| | IC dip 120 or Ic dip 210
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Hi, Is there anybody came across such IC Dip 210 or Dip 120 ? rgds, chia (26 years ago, 8-Sep-98, to lugnet.robotics.handyboard)
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| | using interupts from IC
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I want to drive 3 stepper motors form a handy board. I have the code running now as a dll under windows. What Im trying to gain from the HB is using interupts, so I can remain in connntact with the control while the steps time out- right now I just (...) (26 years ago, 8-Sep-98, to lugnet.robotics.handyboard)
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| | Re: Serial Communication with HP48 calculator
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(...) not that i am aware of. you could connect to the HB's phone jack as long as you don't have to talk to interactive c and your calc at the same time. see the FAQ serial answer. (...) the SPI is for high speed SYNCHRONOUS comms (data and clock (...) (26 years ago, 7-Sep-98, to lugnet.robotics.handyboard)
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| | Bootstrap download mode
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Hi I have been trying to get the HB into bootstrap mode without much success. Following the instructions in the manual, I held down the STOP button while turning on the HB. The red and green LEDs were supposed to turn on for a short period of time (...) (26 years ago, 5-Sep-98, to lugnet.robotics.handyboard)
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| | Re: [LCD screen]
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Like this: printf("\n"); printf("\n"); That's all there is to it. (...) (26 years ago, 4-Sep-98, to lugnet.robotics.handyboard)
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| | Re: Bootstrap download mode
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see if you can get it to go into download mode when you don't have the phone cable plugged in. if this works, then you have some kind of probl with your serial connection. make sure you have a normal modem cable, and a telephone style RJ11 cable (...) (26 years ago, 4-Sep-98, to lugnet.robotics.handyboard)
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| | [LCD screen]
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Hello all, I know it's a pretty stupid question, but anyone knows how am i supposed to clear(in Interactive C) the LCD screen of the HandyBoard ? I've tried printf("\n"); printf(" "); but it doesn't work. Thank you very much. Marcelo Manjon (26 years ago, 4-Sep-98, to lugnet.robotics.handyboard)
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| | Re: Steppr motor pulse problem
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Phillip: In the process I was referring to, you do not use the Handy board, driver or anything to determine the step sequence. You only use the motor and a battery (after you finish with the Ohm meter). The idea is to learn what the motor is (...) (26 years ago, 4-Sep-98, to lugnet.robotics.handyboard)
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| | expansion board
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Hi, I was wondering how the expansion board is doing? Is out of testing? Any major glitches? Ilya (26 years ago, 4-Sep-98, to lugnet.robotics.handyboard)
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| | HB web servers down
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hi all, we had a filesystem upgrade last night and both of the Handy Board web servers (el.www.etc and lcs.www.etc) are presently down. Hope to have at least one of them running later today. Fred (26 years ago, 2-Sep-98, to lugnet.robotics.handyboard)
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| | HandyBoard for Sale
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If you are thinking about buying one... I have an extra HandyBoard controller board that I assembled and tested. Never used in a project. 68HC811E1 (2K EEPROM) 32K RAM 2 x 16 LCD 9 Digital Inputs 7 Analog Outputs IR Interface Nicad Batteries RS-232 (...) (26 years ago, 30-Aug-98, to lugnet.robotics.handyboard)
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| | Re: [Interactive C features]
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[Randy Sargent] spake unto the ether: (...) Sigh. I can't forsee our Autonomous Robotics course buying 15 copies of IC 3.x or greater until it supports case/switch. It's the only feature that our students using freeware 2.81 really complain that (...) (26 years ago, 28-Aug-98, to lugnet.robotics.handyboard)
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| | Resend: problems with main()
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I posted earlier in the week about having a problem with the SRAM. I have determined that there is not a problem with the SRAM on the handyboard. The problem is that "main()" is not executing on reset like it is supposed to. The program that I am (...) (26 years ago, 27-Aug-98, to lugnet.robotics.handyboard)
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| | Re: Analogue sonar design.
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Hi, There is another way to get the Polaroid sonar unit. And that is to find an old Polaroid camera. That's the hardest part but allot of people bought them and are not using them any more. When you open it up there will be the Sonar board complete (...) (26 years ago, 27-Aug-98, to lugnet.robotics.handyboard)
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| | Re: Steppr motor pulse problem
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Phillip and others, To this excellent exposition I would change only one thing: (...) Change this to : "Write this pattern down neatly IN YOUR ROBOTICS NOTEBOOK." One of my professors at school noted that the most important thing he learned in (...) (26 years ago, 27-Aug-98, to lugnet.robotics.handyboard)
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| | Re: Steppr motor pulse problem
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Phillip First step is to put a piece of tape on the shaft so that you can clearly see the shaft turn. Next determine what kind of motor you have (you have probably already done this). Get an ohm meter and determine which wires are connected to (...) (26 years ago, 27-Aug-98, to lugnet.robotics.handyboard)
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| | Re: Steppr motor pulse problem
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Hi Philip, are you shure, you have the right pins from the stepper to the outgoing pins from your chip. Have your stepper 4,5 or 6 cables? If you exchange the cables, your stepper motor only do some vibrations or doing nothing. The easiest way to (...) (26 years ago, 27-Aug-98, to lugnet.robotics.handyboard)
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| | Re: [Interactive C features]
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You can also upgrade to IC 3.1/3.2. Among the improvements include support for multidimensional arrays. -- Randy ---...--- (...) (26 years ago, 27-Aug-98, to lugnet.robotics.handyboard)
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| | Re: [Interactive C features]
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(...) You could use a one dimensional array of length width*height such that: cellMazeWhatever[x][y] is turned into cellMazeWhatever[(x-1)*width+y] (26 years ago, 26-Aug-98, to lugnet.robotics.handyboard)
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| | [Interactive C features]
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Hello All, my name is Marcelo Manjon and i am 5th year graduate student of Mechatronics Engineering at Politechnic School of Sao Paulo University. Turns out that this year i'll be developing a Micromouse Robot using the MIT Handy Board. I have (...) (26 years ago, 26-Aug-98, to lugnet.robotics.handyboard)
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| | Re: Analogue sonar design.
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Jeroen van der Vegt, Let me suggest some articles. First "Sonars on the Cheap" by Keith Payea page 20 of the Fall 1995 issue of The Robotics Practitioner. This looks lie about a $30 design. Second "An Experimenter's Cheap Robotic Sonar System" by (...) (26 years ago, 26-Aug-98, to lugnet.robotics.handyboard)
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| | HB's analog inputs
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does anyone know if the handy board's analog inputs can accept analog current output(4-20mA) from a photo-electric distance sensor? (e.g. the sensor might return 4mA if the object is 1 ft away and 15mA if it's 3 ft away) or can it only accept (...) (26 years ago, 26-Aug-98, to lugnet.robotics.handyboard)
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| | problems with main()
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I posted earlier in the week about having a problem with the SRAM. I have determined that there is not a problem with the SRAM on the handyboard. The problem is that "main()" is not executing on reset like it is supposed to. The program that I am (...) (26 years ago, 26-Aug-98, to lugnet.robotics.handyboard)
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| | Re: HB's analog inputs
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(...) Edmund, Typically the solution is to pass the 4-20 mA through a 250 ohm resistor and measure the voltage across that resistor. As long as your A/D input impedance is high, it can be ignored. A resistor is essentially a current to voltage (...) (26 years ago, 26-Aug-98, to lugnet.robotics.handyboard)
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| | Steppr motor pulse problem
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Hi, I've encounter some problem on using the stepper motor with my self-built driver. I am not using the driver in the HB. I have to build out a driver. The driver chip I use is L298 and logic gate chip is L297 or 374( this chip also use in HB) . (...) (26 years ago, 26-Aug-98, to lugnet.robotics.handyboard)
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| | Digital Outputs
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I have discovered that I can use PA6 as a digital output and am wondering if the same applies to PA3 if I do not require a piezo buzzer? Thank You Joe Martin joema@mpx.com.au (26 years ago, 26-Aug-98, to lugnet.robotics.handyboard)
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| | Re: Infrared Detector
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Mekatronics also sell the GPU58 series detectors -----Original Message----- From: Rick Moll <rickmoll@mvp.net> To: Victor Ruiz <ruizvic@mx1.ibm.com> Cc: handyboard@media.mit.edu <handyboard@media.mit.edu>; Rick Moll <rickmoll@mvp.net> Date: Tuesday, (...) (26 years ago, 25-Aug-98, to lugnet.robotics.handyboard)
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| | Re: interfacing V2X compass
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(...) I ended up doing the same thing. I appreciate hearing that someone else had thesame problem, and used the same solution. It sure is frustrating that you can't trust the documentation that came with the compass; if you need to reset the thing (...) (26 years ago, 25-Aug-98, to lugnet.robotics.handyboard)
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| | Re: interfacing V2X compass
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Rick, I had the same problem. Also the compass would occassionally lock up and require a reset. I tied the reset pin to a digital out and added a routine to take all the necessary pins high and then cycle the reset pin. I reset on initialization and (...) (26 years ago, 25-Aug-98, to lugnet.robotics.handyboard)
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| | Re: Infrared Detector
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(...) The most common metal can IR detectors are made by Sharp. The older ones I have are marked GP1U5X2 (with pins coming out the back of the can), but the newer ones I have are part number GP1U58Y (and have pins coming out of the bottom of the (...) (26 years ago, 25-Aug-98, to lugnet.robotics.handyboard)
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| | HB 4 sale
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I have an assembled Handyboard and MIT's 6.270 board for sale. Both boards work great. 125 ea or 200 for both. Reply to this email (26 years ago, 25-Aug-98, to lugnet.robotics.handyboard)
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