 | | Re: Sonar and Compass
|
|
(...) I have started working on an expansion board version of the compass code. I won't have it done before fall probably (unless is snows or something really bad). I am involved in another huge project right now. My thoughts are to have the compass (...) (25 years ago, 16-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: design alternatives: servo control and power source
|
|
Hi Doug: I built a 12-servomotor walking robot using two SSCs - their interface with the HandyBoard is well documented, and ICB drivers are available on the webpage. I communicate with two SSCs (www.seetron.com) via one serial line connected to PA7 (...) (25 years ago, 16-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | design alternatives: servo control and power source
|
|
Hello, I am planning to build a robot based on the Lynxmotion Hexapod II and Big Grip kits. There will be 12 servos for lego control, 2 servos for the manipulator, and 2 more for a camera pan/tilt unit. Everything appears fairly straightforward, (...) (25 years ago, 16-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Sonar and Compass
|
|
Hi everybody! I've been running both the Polaroid sonar sensor and Vector 2x digital compass on the HB without the expansion board. I'm using Kent Farnsworth's older sonar driver code that is designed for the motor driver output ports (U11). The (...) (25 years ago, 16-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: design alternatives: servo control and power source
|
|
(...) I don't have the Ferrettronics chip datasheet in front of me but some off the cuff calculations: 2400 bps/10 bits per byte=240 bytes per second each servo will require at least 2 bytes (servo # and position) 16 servos * 2 = 32 bytes for each (...) (25 years ago, 16-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Wireless communication with the Handyboard
|
|
We just finished using the same comm. boards for our senior project, so maybe I can help a little. (...) One interesting phenomenon we noticed was that we received random noise at the receiver when the transmitter wasn't on. However, when the (...) (25 years ago, 16-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Wireless communication with the Handyboard
|
|
(...) I was doing some work on wireless between two boards using the DVP board. Though, I can't answer directly your problem coz you are using a computer as your other transceiver. So mine was a little bit easy, but maybe you can get something from (...) (25 years ago, 16-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Wireless communication with the Handyboard
|
|
Hello, I've been very busy trying to communicate with the Handyboard via a wireless link ( HP Development kit form Linx Technologies). I have run into a slight problem- The kit comes with 2 "development boards" - each contains a transmitter, (...) (25 years ago, 16-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Smooth PWM for IC3.2?
|
|
You misunderstood my point, or maybe I was not clear enough. I know the smooth PWM algorithm are available for I3.2. What I require is all the source code that's running on my handy board to be available. It's not the case for IC3.2, so I'm not (...) (25 years ago, 15-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | OT help needed
|
|
I'm going away for ten days and I have lost the address to sign of this list. Would someone please send instructions to me directly? Thanks in advance, Bob Bailey (25 years ago, 15-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Beyond the jitters...
|
|
Well my code does make constant calls to printf() and motor() (although with the original PWM code). I did notice the jitters more on the low end. now I've put aside the head rotation and sonar routines and will start on the encoders. I am (...) (25 years ago, 15-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Smooth PWM for IC3.2?
|
|
Eric/MSMKatz Newton Labs does offer smooth PWM routines for IC3.2. Check ftp://newtonlabs.com...mooth-pwm/ for details. I have used these with my handy board and expansion board (only simple test) and it worked fine. It does require some changes to (...) (25 years ago, 15-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: motor drivers
|
|
might have better luck with www.wirz.com ---...--- | From: Naser A. Ameen <naa6195@silver.sdsmt.edu> | To: Chen Yung Hsu <hsu3@cooper.edu> | Cc: Handyboard@media.mit.edu | Subject: Re: motor drivers | Date: Wednesday, April 14, 1999 3:46 PM | | Try (...) (25 years ago, 15-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: how to
|
|
The licensing info is at : (URL) you can do what you want with it, invluding selling it, as long as you keep the copyright info intact, and acknowledge Fred Martin and the MIT Media Lab as the creators. Keith Disclaimer: I'm not a lawyer and the (...) (25 years ago, 14-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: how to
|
|
Gary, Write direct to Fred Martin. By the way there are three! We downunder at robot-Oz do distribute unassembled and assembled boards in the Australia/Oceania area using Patrick Hui's boards. We just haven't made it onto the Vendor page yet. Will (...) (25 years ago, 14-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: motor drivers
|
|
-->Try Wriz electronics. I think their internet address is www.wriz.com Actually, it's Wirz Electronics (URL) you can check out (URL) this helps. --kam (URL) -->On Wed, 14 Apr 1999, Chen Yung Hsu wrote: --> -->> Hi! i'm looking for places that sell (...) (25 years ago, 14-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: how to
|
|
Does anyone know what it takes to become an "official Handy Board distributor" of assembled boards? There are only two, and there ought to be three! Thanks, Gary Livick (URL) (25 years ago, 14-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: motor drivers
|
|
Try Wriz electronics. I think their internet address is www.wriz.com (...) (25 years ago, 14-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: motor drivers
|
|
Hi! i'm looking for places that sell DC motor drivers or H-bridges. if anyone knows of any please email me back. =) thanx chen (25 years ago, 14-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: More servo jitters...
|
|
My HB is totally new, and I also have the "jitters". However, I have never Zap charged the unit. Although when we observed the jitters we were excessievly calling printf()... We more promenently noticed the jitters when running 2 9V motors (with (...) (25 years ago, 14-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: More servo jitters...
|
|
Take a look here for an interesting looking servo controller: (URL) route you go, please post the results. - - - Nick - - - Will Bain wrote: <snip> (...) (25 years ago, 14-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: More servo jitters...
|
|
(...) I doubt that the jitters are from zapping your battery. I get servo jitters, too, and I've never zapped my battery. I saw a suggestion on the list a while back that it has something to do with interference from the LCD printf routine. I plan (...) (25 years ago, 14-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Converting .ASM to .ICB
|
|
you use a special version of as11 that makes icb files. on the mac, there is a port by David Negro. look in the Software/Utils page of the HB site. Fred (...) (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Converting .ASM to .ICB
|
|
Hi, this is kind of urgent, but i need to know how compile (is this the write word of it?) an ASM file into an ICB file. Any help would be appreciated. Please note that I am working on a Mac platform but I normally do not use Macs. Thanks in (...) (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: U12 on the Handyboard
|
|
If you're prepared to order from the Uk, you can get it from www.Farnell.com It's a couple of quid. Matt -----Original Message----- From: Ravi Madhav K. Adatrao <ravia@dd254.comm.mot.com> To: handyboard@media.mit.edu <handyboard@media.mit.edu> Cc: (...) (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: U12 on the Handy board.
|
|
You can order the part directly from Dallas Semiconductors at (URL) ordered 10 last week for about $1.40/each (I think). --kam (URL) Tue, 13 Apr 1999, Ravi Madhav K. Adatrao wrote: -->Hi- --> --> I am not able to find DS-1233-10 (U12) for the handy (...) (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | More servo jitters...
|
|
As a follow up to my nervous servo, it gets the shakes even when running as a single process. Ok, I confess... I recharged it on ZAP and fell asleep... Is it possible that either the servo or the HB was damaged by this in such a way as to give it a (...) (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: help about part C3
|
|
Does it have to be these parts? Can you put a few together or even use ceramic, polyester, etc? ---...--- ericson mar Robotics Consultant mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the Advancement of (...) (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | U12 on the Handy board.
|
|
Hi- I am not able to find DS-1233-10 (U12) for the handy board. If anybody knows where I could get it or even a good replacement for it, please inform me. Thanks, Ravi. (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Fwd: Re: help about part C3
|
|
replying to my own msg... (...) (that is, (...) in other words, (...) ok, so P6305-ND is the part i originally specified. sure enough, you can't find it online. but i found it in the latest print digikey catalog! (i didn't check that it was the same (...) (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: help about part C3
|
|
use Digikey P6305-ND or P5417-ND. both are 470 uF electrolytics, axial leads (that is, leads sticking out opposite ends) and are 16 mm long and 8 mm in diameter. in other words, they're the right value and they'll fit. F. (...) (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | help about part C3
|
|
Can anyone tell me of a good place to get part C3 for the handy board?...DigiKey no longer has it or a replacement. -Jon Schuck (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Has anyone an icb-routine for 9600b serial connection ?
|
|
Hi, i used the serialio.c routines to establish a data connection between the Handyboard and a Linux PC and encountered the same problems already mentioned in the mailing list: 1) Only char by char transmission with sleeps between transmissions (...) (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Servo DEinitialization.
|
|
Sorry. I'll reread the documentation. I was going by memory. Fred G. Martin Fred G. Martin (...) Ross Tonkens (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Servo DEinitialization.
|
|
(...) as it says in the docs: init_expbd_servos(int action) If action is zero, servo control signals are disabled. If action is non-zero, servo control signals are enabled. Control signals are disabled by default every time the Handy Board is reset. (...) (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Servo DEinitialization.
|
|
I'd go for the Coke can idea. Sounds like a surer shot. I thought init_expbd_servos(x), where x = integer from 0 to 5, was used to initialize the servos individually. Stupid me. I've been using init_expbd_servos(5), and, since I only had #5 hooked (...) (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Expansion Board Servo timing...
|
|
Hi Doc, The function call "init_expbd_servos(0);" turns them off, "init_expbd_servos(1);" turns them on. Something like "servo5=2300;" commands a servo to a position, but only if the servos are initialized as per above. Maybe I used a confusing term (...) (25 years ago, 12-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Desgning H-bridge
|
|
The motor driver circuit is a bipolar push-pull current amplifier. It's really cheap, easy to build and works well with the Tamiya motor/gearbox kits available from (URL) or (URL) I'm sure it has its limitations, but works for small robot projects. (...) (25 years ago, 12-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Expansion Board Servo timing...
|
|
How do you "de-initialize" a sevo? I am only familiar with the init_expbd_servos(x) command and with reassigning the servo(x) global variable to effect servo repositioning. Ross M. Tonkens, M.D. Medical Director Primary Care of Nevada 100 North (...) (25 years ago, 12-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Expansion Board Servo timing...
|
|
(...) I don't know about the servo routines on the HB, but servos *do* start to jitter when the pulses get much below about 20Hz. This is not due to the pulse width 'fluctuating', it's because the refresh rate is dropping. It certainly is possible (...) (25 years ago, 12-Apr-99, to lugnet.robotics.handyboard)
|
