 | | Stepper motors in australia?
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Does anyone know where I could get hold of a couple of stepper motors & matching gearboxes in Australia? I've tried everywhere I can think of with no luck. ANy help greatly appreciated thanks Adam (25 years ago, 23-Feb-00, to lugnet.robotics.handyboard)
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| | heres where to get that IR demodulator
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I had a close look at that IR receiver and gasp - it looks just the same as one i bought from a local store, dick smith electronics. The part IS1U60 is listed as U60. It is now discontinued but the replacement, U61 is just the same, only buffered. (...) (25 years ago, 23-Feb-00, to lugnet.robotics.handyboard)
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| | Re: 68HC11 assembly commands
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On the page Gary cites, the link "upwards" is incorrect. It should be (URL) got a **lot** of stuff there. It's really worth checking out. David (...) (25 years ago, 22-Feb-00, to lugnet.robotics.handyboard)
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| | Please unsbubscribe me
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Come on, please unsubscribe me, I've been trying for the longest time, yeah I know send email to Mr. Martin, it's not working!!!! uhhh...hhh! (25 years ago, 22-Feb-00, to lugnet.robotics.handyboard)
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| | Re: 68HC11 assembly commands
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(URL) is the web page of Tom Dickens. Be sure to send him an email of thanks for the work of posting all the things he has up for the HC11. (...) (25 years ago, 22-Feb-00, to lugnet.robotics.handyboard)
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| | WARNING WRONG ARITHMETICS ON HB !!!
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Working with the free version of IC for Linux 2.860 BETA I discovered faulty operations on my handyboard. Please download the following program to check your own soft- and hardware. Can anybody tell me the result with the commercial version of IC. (...) (25 years ago, 21-Feb-00, to lugnet.robotics.handyboard)
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| | Re: 9V Lego Motor and motor output
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(...) I guess this is a common problem, which is based on the low power consumption of the LEGO motors (the speed of the motors DOES change, but not significantly). There are two ways of solving this problem: 1. Try Julian Skidmores smooth power (...) (25 years ago, 21-Feb-00, to lugnet.robotics.handyboard)
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| | RE: 68HC11 assembly commands
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Hi! To get the "Pink Book", go to: (URL) fill out the order form. The "Pink Book" product number is: M68HC11RM/AD. It should cost you nothing to order it. Good luck, (...) ______ ______ ---...--- |_ _| |_ _| Kam Leang | |______| |______ University (...) (25 years ago, 21-Feb-00, to lugnet.robotics.handyboard)
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| | RE: 68HC11 assembly commands
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-----Original Message----- From: E158 (M.FAZAL) [mailto:M.FAZAL@bham...ham.ac.uk] Sent: Sunday, February 20, 2000 6:52 PM To: 'handyboard@media.mit.edu' Subject: 68HC11 assembly commands hi all, could anyone pls point me to where i can get the (...) (25 years ago, 21-Feb-00, to lugnet.robotics.handyboard)
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| | Re: 68HC11 assembly commands
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(...) How about www.motorola.com? DLC (25 years ago, 21-Feb-00, to lugnet.robotics.handyboard)
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| | 68HC11 assembly commands
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hi all, could anyone pls point me to where i can get the assembler instruction set for the 68HC11 processor. many thanks m fazal (25 years ago, 20-Feb-00, to lugnet.robotics.handyboard)
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| | Re: LCD displays
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(...) Backlighting is a "no issue" for most of our usage. I have used all but the 40x1 displays from BG and they all work fine. If there is a 44780 on the board, you can use it. Does _anyone_ make an LCD that isn't 44780 compatable anyway? I built (...) (25 years ago, 20-Feb-00, to lugnet.robotics.handyboard)
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| | 9V Lego Motor and motor output
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I am using motor port 0 to control a lego motor (gearmotor #5225) The problem I am having is that I cannot seem to change the motor speed using motor(0, speed) where speed is between -100 & 100. The motor turns on at 15 (or -15), but sstays at the (...) (25 years ago, 20-Feb-00, to lugnet.robotics.handyboard)
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| | LCD displays
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Since the Hitachi web site is useless and i can't find data sheets for the 16x2 display, i am looking for alternatives - i'd like to get them from BG micro since they have all kinds of goodies like the 68hc11, RAM chips and displays. Which of the (...) (25 years ago, 20-Feb-00, to lugnet.robotics.handyboard)
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| | HB Expansion Board Digital Outs
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Hi all! Does anyone know about the digital outs on the expansion board? Specifically, what is their maximum current output (per pin), what is the output voltage, etc? Thanks a million, Ian Nieves (25 years ago, 20-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Memory Problems
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When you say "room mapping" it usually means that you've allocated some array somewhere that is huge. --Chuck (...) (25 years ago, 19-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Memory Problems
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I've seen it said that the IC interpreter takes up about 16K. You have most of the rest for your program. 16K is a LOT of space, and I'd be surprised if you used half of that with what you want to do, provided of course that your grid map is not too (...) (25 years ago, 19-Feb-00, to lugnet.robotics.handyboard)
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| | Memory Problems
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Hi everyone, Does anyone know exactly how many lines of code can fit on the board before IC begins to run out of memory?? I can't seem to find an exact figure anywhere. Our robot must have the ability to detect signals from a sony remote control, (...) (25 years ago, 19-Feb-00, to lugnet.robotics.handyboard)
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| | Re: a few part questions (of course!)
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--- David Perry <davidperry@geocities.com> wrote: <snip> (...) Somebody on this mailing list (I forgot who) has a web page that says the IR receiver module (38kHz, side-look) from Digikey (www.digikey.com), part no. 160-1153-ND, is pretty much (...) (25 years ago, 19-Feb-00, to lugnet.robotics.handyboard)
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| | RE: itc99 Online auction
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SPAM is not welcome on this group! | -----Original Message----- | From: membership55@earthlink.net [mailto:membership55...hlink.net] | Sent: Friday, February 18, 2000 7:18 PM | To: handyboard@media.mit.edu | Subject: itc99 Online auction | | | | (...) (25 years ago, 19-Feb-00, to lugnet.robotics.handyboard)
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| | (canceled)
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| | Re: a few part questions (of course!)
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(...) We love it. Lets us show that after being in robotics for a couple of months, we are now experts! (...) Go here and get this chip instead.... (URL) (...) They are around, but if you can't find any, I have one I'll part with for $4.00 over my (...) (25 years ago, 18-Feb-00, to lugnet.robotics.handyboard)
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| | a few part questions (of course!)
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Hi, Being on the BEAM robotics list for ages i realise how annoying it is to have newbies coming in and you having to explain things all over again, but i just can't find the info i'm looking for so here goes... I've found most parts, but there a (...) (25 years ago, 18-Feb-00, to lugnet.robotics.handyboard)
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| | I NEED SOME HELP...
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Hi, I`m working in my mobile robot and a have a lot of questions, here there are some: 1. I need to communicate the HB with mi PC all the time during the execution of the HB main program, How can I do this? Through the SPI or the computer conector (...) (25 years ago, 18-Feb-00, to lugnet.robotics.handyboard)
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| | Re: GP2DO2_I.icb
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Hi, A more recent version of the web page contains versions of the software for 2, 4, or 6 GP2D02's as well as the Excel spreadsheet to convert the output of the device to centimeters. The page can be found at: (URL) not sure what the problem is (...) (25 years ago, 17-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Sonar Sensor problems
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Hi all if anyone has problems using the 6500 series for distances below 35cm by using the binh signal I have a possible solution to the problem. We also expierienced problems using the sensors for distances between 15cm and 40cm. We finally found (...) (25 years ago, 17-Feb-00, to lugnet.robotics.handyboard)
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| | Re: asm compliers
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Try the Handy Board site at (URL) Livick (...) (25 years ago, 17-Feb-00, to lugnet.robotics.handyboard)
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| | asm compliers
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hi all which and where do i get a compiler to convert asm files to .icb cheers fazal (25 years ago, 17-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Sonar Sensor problems
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Did your team solder the proper capacitor into the sonar board in accordance with the instructions on the HB web site? I was just wondering, because others who forgot the capacitor have reported similar problems. Also, you may want to try tweaking (...) (25 years ago, 17-Feb-00, to lugnet.robotics.handyboard)
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| | GP2DO2_I.icb
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Hi Barry, Having trouble downloading your software to my handyboard. I had it working fine a while back but purchased a new computer and lost the file. What am I doing wrong? I think I'm suppose to load the icb file first then the c file. I renamed (...) (25 years ago, 17-Feb-00, to lugnet.robotics.handyboard)
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| | Long Beach, CA Handyboard users?
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Are there any HB users in the Long Beach, CA area? I'm interested in getting a group together to build and run small robots in a maze to develop navigation and AI code in IC. We'd meet once a month on whichever saturday doesn't interfere with RSSC (...) (25 years ago, 16-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Slower serial connection
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(...) Ah! I see the problem. If you really wanted to do it, I'm sure you could scan through the Mac software to find where the baud rate was set, and then change a few bytes. It might take some time to find it though. You could also ask Newton Labs (...) (25 years ago, 16-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Slower serial connection
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(...) Ah, I tried this, but it breaks the pcode serial connection. IC on the Mac side seems to demand a 9600-baud connection and can't compensate for different rates. I suppose I should move to a different C compiler, but I'd lose the interactivity (...) (25 years ago, 16-Feb-00, to lugnet.robotics.handyboard)
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| | ANN: fire-fighting robot contest at Penn State (3-25)
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Hi All, On Saturday, March 25, 2000, 3-5pm, Penn State Abington College, Abington, PA (Phila., PA USA region) will host a Fire-Fighting Robot Contest based on the rules of the International Fire-Fighting Robot Contest held annually at Trinity (...) (25 years ago, 16-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Slower serial connection
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(...) I figured it out either from the Handyboard web pages at MIT or from the big pink book (Motorola HC11 Book). I have had my Handyboard receiving from a GPS and tranmitting to a TNC at 4800 baud. Initially did it with IC, but am now using GCC (...) (25 years ago, 16-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Slower serial connection
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Does anyone know how to reduce the baud rate used by IC? (I'm running Mac version 3.1.) I'd like to replace the serial cable with an RF link, but keep the interactivity of IC. Incidentally, I've found that the Parallax RF stamps work quite well on (...) (25 years ago, 16-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Slower serial connection
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Hi everyone! The RF tx/rx units shown on the page were from Ming Microsystems. They were rated for 1200 baud, but I've been able to transmit/receive slower using the Parallax Inc. RF boards, which were rated for 300 baud. For slower serial (...) (25 years ago, 16-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Slower serial connection
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Try this web page: (URL) . It should have what you want. I have not tried it myself, but I do have the reciever/transmitter pair described on the page. (...) <excerpt><fontfamily...smaller>Is it possible to slow down the speed of the serial (...) (25 years ago, 16-Feb-00, to lugnet.robotics.handyboard)
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| | IR sensor
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Hi.. does anyone know how to interface GP1u58X or IS1u60 Sharp IR sensor with handboard ?? i've tired to hack the GP1u58X from digital to analog output and plug it into analog input of HB, but the result is not good.. is there any software which can (...) (25 years ago, 16-Feb-00, to lugnet.robotics.handyboard)
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| | Re: serial output
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My transmitter module can accept upto 1200 baud. can i modify this driver to run at 1200baud. if possible how? i dont really understant assembly code. could you also point me to a book or manual which gives assembler commands. many thanks M Fazal (...) (25 years ago, 16-Feb-00, to lugnet.robotics.handyboard)
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| | Slower serial connection
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Is it possible to slow down the speed of the serial interface on the Handyboard? I have just gotten hold of a couple of RF transmit/receive pairs, but they are only able to go up to about 1200 baud or so. I don't intend using IC over the link, just (...) (25 years ago, 16-Feb-00, to lugnet.robotics.handyboard)
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| | Re: serial output
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you're not going to be able to generate accurate bit times using Interactive C -- it'd have to be an assembly language driver. use the 9600 baud output driver located at (URL) your message you said: (...) (25 years ago, 16-Feb-00, to lugnet.robotics.handyboard)
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| | serial output
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hi i want to send a byte as a series of bit to a transamitter module i am using. the FAQ says i can use the digital 9, or SPI port or TOC3. i can output to these ports. the first problem is getting the delay times between bits. if i use the msleep() (...) (25 years ago, 16-Feb-00, to lugnet.robotics.handyboard)
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| | Lcd displays for the Handyboard.
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Folks, Now and then I see people searching for LCD displays for the HandyBoards. I just came across some at a local surplus store. I purchased extras, and I'm will part with a few. These are new Vikay 2x16 lcd's, in a sealed bag. How about $5.50ea (...) (25 years ago, 16-Feb-00, to lugnet.robotics.handyboard)
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| | array of char in IC
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Hi, I am using IC. In my program I have an array of char (char serial_get_buffer[256]) as a global variable. This variable is used in a function. I want that when ever this function is called the array should be initialized to NULL. I tried (...) (25 years ago, 14-Feb-00, to lugnet.robotics.handyboard)
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| | Radio control w/ handyboard
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Hello all, I expect my handyboard to arrive in the mail within a few days... so I am playing around with some ideas of what I want to accomplish with it. my question: has anybody integrated a radio controlled car remote (wireless) with a handyboard (...) (25 years ago, 13-Feb-00, to lugnet.robotics.handyboard)
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| | Re: I have Rug-Warrior Project!
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You can check with Mouser Electronics (800) 346-6873 with the following link to order: (URL) Mouser Stock Number for the plastic enclosure is 537-402. It has many different colors. Best Regards, Patrick Robot Store (HK) (URL) Message----- From: (...) (25 years ago, 13-Feb-00, to lugnet.robotics.handyboard)
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| | I have Rug-Warrior Project!
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Dear Fred: I'm a Mechanical Engineering student in University California Irvine. I have project of building handy-board for my digital course.Now I've statred assemling but I have problem for supplying some parts.The parts which I need are 4 self (...) (25 years ago, 13-Feb-00, to lugnet.robotics.handyboard)
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| | Re: New Computer Connection
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The second port needs to be enabled in BIOS and you must have enough free IRQ's to accomodate it. Email me offline if you have questions. (...) (25 years ago, 13-Feb-00, to lugnet.robotics.handyboard)
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| | New Computer Connection
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Hello, I had the serial cable connected to the com port that was not working. I went to Control Panel System, device manager Ports[COM&LPT] Communications Port[COM1] Only one com. port is listed here but I have another serial port physically next to (...) (25 years ago, 13-Feb-00, to lugnet.robotics.handyboard)
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| | new computer connection
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Greetings All, Have purchased a new computer and cannot communicate with my handy board. I remember some time back in the mail archives that some settings had to be changed if the computer was too fast for IC but cannot find it now. Computer has a (...) (25 years ago, 13-Feb-00, to lugnet.robotics.handyboard)
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| | Re: (no subject)
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(...) The obvious question is how you are measuring your capacitor and resistor values?. Resistors (presumably metal film), are typically +/-1%, but capacitors are unlikely to be 'better' than +/-5%, and may be significantly worse than this (many (...) (25 years ago, 12-Feb-00, to lugnet.robotics.handyboard)
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| | Re: 41Khz not 38KHz
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The 3.81K resistor is probably more accurate than its rated 1%, but the capacitor may be much less precise, unless you got a tight tolerance metal film one, (as I think the part list specifies). Precision also relies on the thresholds of the Schmitt (...) (25 years ago, 12-Feb-00, to lugnet.robotics.handyboard)
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| | (no subject)
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Maybe somebody could help. I am try to use the IR output. the problem is that the HB is modulating the signal at 41kHz and I need to get it down to 38kHz. I have checked the resistor and capacitor used in generating the frequency. R = 3.81 K C = (...) (25 years ago, 12-Feb-00, to lugnet.robotics.handyboard)
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| | encoder chip
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Hi, does anyone know how to interface the hewlett packard decoder IC to Handyboard? Regards,William. (25 years ago, 11-Feb-00, to lugnet.robotics.handyboard)
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| | Re: IC routine for ranging and angle finding with the GP2D12
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Following up on my challenge to get some things happening here..... Following is an IC routine that can be used to find angular displacement from and distance to a wall. It uses the Sharp GP2D12 IR ranging module mounted on a servo to do the (...) (25 years ago, 10-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Shaft encoders interfacing with Handy Board
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I've had great success using Hall-effect magnetic sensors as shaft encoders with the Handy Board. The sensors are the type that Patrick Hui (of the Robot Store HK) includes in his HB sensor kit. I glued small disk magnets into the holes in a pair of (...) (25 years ago, 10-Feb-00, to lugnet.robotics.handyboard)
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| | Shaft encoders interfacing with Handy Board
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Hi everybody I'm trying to find an encoder to work with my Handy Board(using a DC motor). Please help me if you know anything about Shaft encoder(S1 optical encoder)interfacing with Handy Board. Can i use the Shaft encoder? Do you know how to (...) (25 years ago, 10-Feb-00, to lugnet.robotics.handyboard)
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| | Handyboard for Sale
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I bought a handyboard for my Thesis to do some data aquisition....now that I am done and out in the working world I don't think I am going to need it anytime soon. (Unless I go for my Phd :) ) Anyway, it is fully assembled and works fine. Comes with (...) (25 years ago, 10-Feb-00, to lugnet.robotics.handyboard)
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| | Re: IC Problems
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(...) Christian, I had similar problems with my handyboard twice. The first time the expansion board was causing the problem, so if you are using the expansion board, try to run dl without it. Fortunately I was in the lucky situation to have two (...) (25 years ago, 10-Feb-00, to lugnet.robotics.handyboard)
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| | IC Problems
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My problem is in running downloader. I am supplying power directly to the board but all that it displays is top row of black boxes which are kind of faded. Then I run the downloader program and it says it worked but the welcome message doesn't come (...) (25 years ago, 10-Feb-00, to lugnet.robotics.handyboard)
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| | Re: some action around here
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Hey, Handy Board people! I don't know if anybody has noticed, but this group is dead, dead, dead! It's time to get things going. Maybe people have some neat projects going on to tell us about. I have a robot I'm working on that you can read about on (...) (25 years ago, 9-Feb-00, to lugnet.robotics.handyboard)
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| | hbtest.c / "testdigitals();"
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Dear Reader, I'm assembling a handyboard-kit form Acroname and I've reached the step of testing Digital Input Circuit. After loading hbtest.c I try to start "testdigitals();" and the following happens in the IC-Window: Downloading 24 bytes (adresses (...) (25 years ago, 9-Feb-00, to lugnet.robotics.handyboard)
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| | Re: LCD
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(...) ______ ______ ---...--- |_ _| |_ _| Kam Leang | |______| |______ University of Utah | |_ _| |_ _| Department of Mechanical Engineering | | | | | | | | MEB Room 2202 Salt Lake City, UT 84112 | |_|__|_| | | | (Tel) 801.581.7105 (Fax) (...) (25 years ago, 8-Feb-00, to lugnet.robotics.handyboard)
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| | LCD
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Does anyone know where I can my the whole LCD unit for the handyboard? Gleason sells assembled ones only. please reply km (25 years ago, 8-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Battery Capacity
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(...) I am using 8-NiMH-AA-cells, 1100 mAh each, without any problems. For German Handyboard users: www.reichelt.de sells either single sells or a soldered pack of batteries. Actually you can even get upto 1700 mAh-cells (no experience with those (...) (25 years ago, 8-Feb-00, to lugnet.robotics.handyboard)
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| |
| | [OT] Re: Wav2Asc
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(...) PE Micro has a program that converts binary into S-records. (URL) you may want to look into a program called Sox. Sox converts just about any sound format into just about any other. You could, trivially, convert a WAV file into a pulse code (...) (25 years ago, 8-Feb-00, to lugnet.robotics.handyboard)
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| |
| | Re: hexipod walker
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Scott Edwards Electronics web site is: (...) (25 years ago, 7-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Battery Capacity
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I suppose that maybe your NiCd cells are just nearing the end of their useful life. Either that, or you have a wiring problem somewhere in the power circuit. Also, it's generally not a good idea to mix different types of cells (different capacities) (...) (25 years ago, 7-Feb-00, to lugnet.robotics.handyboard)
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| | Re: hexipod walker
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|
where would i get a SSC? (...) (25 years ago, 7-Feb-00, to lugnet.robotics.handyboard)
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| | Battery Capacity
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Hi all, Ive been having problems with my bots supply for a while now. The problem is that the motors (LEGO 9v ) seem to be drawing too much current. whenever my bot changes direction or trys to accellerate from a standstill, the board resets. Im (...) (25 years ago, 7-Feb-00, to lugnet.robotics.handyboard)
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| | Wav2Asc
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Im after a program to convert a Wav sound file to Ascii to be able to burn it to eprom. Can any1 help ? (25 years ago, 7-Feb-00, to lugnet.robotics.handyboard)
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| | Re: DC motor
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|
Its sound like your motor is drawing excessive current, thus resetting your Handy Board. You might want to beef up to a higher capacity battery or you can try running your servos off an external power source. Good Luck. (25 years ago, 7-Feb-00, to lugnet.robotics.handyboard)
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| | Need a clock signal to interface encoder chip
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I am trying to interface an HP quadrature-type encoder to the handyboard using the HP HCTL-2016 encoder chip. The problem is that the chip requires a clock signal to synchronize the data latching and transfer functions and I am not sure which type (...) (25 years ago, 7-Feb-00, to lugnet.robotics.handyboard)
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| | Re: DC motor
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Thanks for your reply, but before i remove all the elecrtonic part inside the servo, i have cut out all the mechanical part, but the problem still happen, do you know why ?? thanks.. (...) (25 years ago, 7-Feb-00, to lugnet.robotics.handyboard)
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| | Re: hexipod walker
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Thanks for the tip! I am new to this, and I am really anxious to build robot with legs. I don't know much about PIC (yeah, what does that stand for anyway? :-p), but knowing that PIC is what I need, I can at least get start on finding books on (...) (25 years ago, 6-Feb-00, to lugnet.robotics.handyboard)
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| | Re: DC motor
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It sounds like you might have a mechanical, rather than electrical, problem. Servos typically have some sort of stop nub on the gears so that they can't rotate past a certain point. If you don't cut off the nub with a hobby knife or saw, the motor (...) (25 years ago, 5-Feb-00, to lugnet.robotics.handyboard)
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| | DC motor
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Hello.. i am a beginner of using HB and i have some problem hope you can help me.. thanks.. I have hacked a servo motor to become a DC motor (by removing all electronic parts inside the servo) and plugged the "motor" into the motor port. but when i (...) (25 years ago, 5-Feb-00, to lugnet.robotics.handyboard)
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| | Re: hall effect sensors
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(...) Oops, I jsut realized that your question was about HB, and I was replying about Mindstorms. I don't know whether this Hall Effect sensor will work on HB. Sorry. (25 years ago, 4-Feb-00, to lugnet.robotics.handyboard)
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| | Re: hall effect sensors
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(...) Knudsen in his book (p 223) uses Digi-Key part number DN6847SE-ND, which, he says, is "sticky" in the sense that it remains set until explicitly reset. I have no experience with it. (25 years ago, 4-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Good source for Servos
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(...) (25 years ago, 4-Feb-00, to lugnet.robotics.handyboard, lugnet.robotics)
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| | Good source for Servos
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Hi, Can somebody tell me where I can buy servos cheap? Thanks Kalyan Mulampaka Software Engineer e GE Information Services ___...___ Ph#: (770) 698 4436 (O) (770) 390 0887 (R) (25 years ago, 4-Feb-00, to lugnet.robotics.handyboard, lugnet.robotics)
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| | Re: hexapod walker
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(...) An excellent site Rien! I hope you get the SPO256 code and diagram posted soon. Thanks, - Nick - (25 years ago, 4-Feb-00, to lugnet.robotics.handyboard)
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| | Re: hexipod walker
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Personally I use a Scott Edwards Serial Servo Controller (model 1, there is a new one out now) - SSC. On the handyboard web site is a program to control this serial device from the handyboard, which means you can just set each leg position and let (...) (25 years ago, 4-Feb-00, to lugnet.robotics.handyboard)
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| | Re: hexipod walker
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Have a look a (URL) is my hobby robotics site. Currently I have a Hexwalker running with a HB. The 12 servo's are simply controller by a PIC 16F84. This PIC is controlled by the HB through an async interface. This makes it lightweight on the HB, so (...) (25 years ago, 4-Feb-00, to lugnet.robotics.handyboard)
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| | hall effect sensors
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hi all i am thinking of buying a hall effect magnetic sensor. what is the model compatible with the HB and what is its sensing range. cheers fazal (25 years ago, 4-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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My guess is that the Polaroid unit will only be able to drive transducers with electrical characteristics very similar to the Polaroid transducer. The transducer functions mainly as a capacitor, and in between pings, it is kept at a couple hundred (...) (25 years ago, 4-Feb-00, to lugnet.robotics.handyboard)
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| | Re: GP2D02?
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Yeah, go to Acroname Inc. at (URL) or Patrick Hui/The Robot Store at (URL) Ray Gansler Mike (K1-Fh/ESC1) <handyboard@media.mit.edu> wrote in message news:4B9D9ADDF526D21...kes.com... Has anyone found a source for the GP2D02? -----Original (...) (25 years ago, 4-Feb-00, to lugnet.robotics.handyboard)
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| | Re: hexipod walker
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COOL! How do you control 8 servos? I have the expansion board and there are only 6 servo connections there. What other port did you use to control the other 2 servo? Or do you use the expansion board at all? I am looking for a way to add two more (...) (25 years ago, 4-Feb-00, to lugnet.robotics.handyboard)
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| | Re: HB and Acceleration
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Actually, I live in Wisconsin, and I heard about the "Rockets for School" but no one in my high school knows anything about it. I saw it on the news. . . Now that I am in college, and I still want to try launching something up in the sky! Possibly a (...) (25 years ago, 4-Feb-00, to lugnet.robotics.handyboard)
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| | Sonar and the handyboard
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I need to attach an underwater sonar ranger to the handyboard but I cannot figure out how. Does anyone have any experience with this? One question that I have is if sonar transducers other than the polaroid 7000 unit can be attached to Polaroids (...) (25 years ago, 3-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Analog/Digital IO
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Maxim sells a chip that I have connected to the parallel port on my PC and it seems to work well. I got the design from an article in Dr. Dobbs. The article was on using Linux to collect data. The author of the article has a book which has the (...) (25 years ago, 3-Feb-00, to lugnet.robotics.handyboard)
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| | RE: Analog/Digital IO
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Is that how it works? I remeber a time when some students were using a joystick for a project and recall them dealing with some sort of PWM. As to whether they were the joystick position signals, I'm not entirely sure. (...) This message is for the (...) (25 years ago, 3-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Analog/Digital IO
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hey -- how about a game card! that gives you digital (joystick buttons) and analog (resistor readings). fred In your message you said: (...) (25 years ago, 3-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Analog/Digital IO
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(...) For digital values, you can use a parallel port card, or even handshake lines on a serial port. For analog, you can again use a parallel port, and hook up an external A/D chip. As long as you're not trying to get too many bits of resolution (...) (25 years ago, 3-Feb-00, to lugnet.robotics.handyboard)
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| | Analog/Digital IO
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I know this question does not really relate to the handyboard, but does anyone know of a cheap PCI or ISA card for a PC to read analog or digital values? Thanks, Mike Reiling (25 years ago, 3-Feb-00, to lugnet.robotics.handyboard)
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| | stepper motor sequence [DAT]
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hi all i was trying to connect a uni polar stepper motor with the hb. i was using the stepping sequence given in peter harrison page. A B C D 1 0 0 0 0 0 1 0 0 1 0 0 0 0 0 1 This sequence means that each coil will be energised one by one. and at no (...) (25 years ago, 3-Feb-00, to lugnet.robotics.handyboard)
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| | Re: 12V servo motors
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Since the HB battery is only 9.6 V, a 12 V motor would most likely draw too much current and pop the circuit breaker (or worse). I don't see why you couldn't power the servos with a separate 12 V battery, though. The HB expansion board is all set up (...) (25 years ago, 2-Feb-00, to lugnet.robotics.handyboard)
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| | 12V servo motors
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hi, The HB FAQ says to use 6V servo motors connected to the batt supply with a couple of series diodes to reduce the voltage. can i use 12V servos instead? cheers fazal (25 years ago, 2-Feb-00, to lugnet.robotics.handyboard)
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| | RE: More servo stuff
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Hi. We have a problem with servo as well. When we test one servo motor, it works just fine. But when we test more than one, the speed of each servo decreases. Does anyone have similar problem? Thanks for your help. Damee Choi (25 years ago, 1-Feb-00, to lugnet.robotics.handyboard)
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