 | | 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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| | Radio Communication and the Handy Board
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In 1998 I made a mobile robot that communicates with a desktop computer using a radio module. Shortly after I accomplished this I made a webpage showing the results. Recently I moved to this page to another location. I invite you all to take a look (...) (25 years ago, 29-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Video Transmitters
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Yeah, I think it was free for a first time customer! -- Ray Gary Livick <handyboard@media.mit.edu> wrote in message news:383C71AB.C0C8B2...ell.net... I received the X-10 cam I ordered two days ago. It arrived right on time, and is pretty impressive (...) (25 years ago, 29-Jan-00, to lugnet.robotics.handyboard)
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| | Re: IR detection
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Yeah. It is a material that will illuminate when a IR source shines a beam on it. -- Ray Dovi Poznanski <handyboard@media.mit.edu> wrote in message news:3837E5F9.517BC7...u.ac.il... hey does anybody know how an IR sensor card works? -- Dovi (...) (25 years ago, 29-Jan-00, to lugnet.robotics.handyboard)
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| | ratings of stepper and servo motors
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hi all what are the ratings (voltages and currents loads) of stepper and servo motors compatible with the handy board. cheers fazal (25 years ago, 28-Jan-00, to lugnet.robotics.handyboard)
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| | Re: HandyBoard died
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I am sorry to hear about your situation, but I would like to point out that this sort of thing is exactly why the handyboard could, I believe, benefit from having a durable case made for it, which provides all access to the handyboard's (and (...) (25 years ago, 28-Jan-00, to lugnet.robotics.handyboard)
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| | test
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Testing (25 years ago, 27-Jan-00, to lugnet.robotics.handyboard)
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| | Re: PID Control
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(...) Yep ... and no. The following was applied to a pneumatic cylinder controlled via an Amplicon Liveline I/O card and an SMC proportional valve (ie not Lego). code ***...*** pidloop: 'e = error, sp = set point (desired value), pv = process value (...) (25 years ago, 27-Jan-00, to lugnet.robotics.handyboard)
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| | RE: PID Control
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This sounds like the sort of software that would be benifitial to everyone working with the Handyboard, perhaps it could be posted on the HB site? Fred? Reagrds, Matt (...) (25 years ago, 27-Jan-00, to lugnet.robotics.handyboard)
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| | Re: PID Control
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Hi Mike: May I obtain also the code that you mentioned? I'm supposing the code was used at the HandyBoard? Thanks in advance for your help... Victor G. Ruiz Aranda ruizvic@mx1.ibm.com IBM de Mexico S.A. Coordinador IAS Planta de Manufactura T/L (...) (25 years ago, 27-Jan-00, to lugnet.robotics.handyboard)
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| | Re: colour sensor
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I would suggest that the sensors are picking up IR. I would wager that your color filters are passing the IR with little attenuation and that your sensors are peaked in the IR region and little affected by the visible color information. If you have (...) (25 years ago, 27-Jan-00, to lugnet.robotics.handyboard)
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| | Re: colour sensor
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(...) I posted to this yesterday, but my reply seems to have not appeared. What you need to have, is four sensors, not three. The fourth has no filter, and measures 'ambient' light. You then need to compare the return from this, to the other three (...) (25 years ago, 27-Jan-00, to lugnet.robotics.handyboard)
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| | HandyBoard died
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Hi all! I have some troubles with my HB. I have set it up together with the expansion board, and it worked properly and very fine. Then once, unfortunately, the LCD, connected to the expansion board, touched one of the five motor-power diodes, and (...) (25 years ago, 27-Jan-00, to lugnet.robotics.handyboard)
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| | Re: PID Control
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Bill I have code in QuickBasic and C, would this be any good to you?? It was code that I used at Uni and both versions have been tested on real apps so I know they work. For example, I developed a pneumatic cyclinder controller based on the QB (...) (25 years ago, 27-Jan-00, to lugnet.robotics.handyboard)
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| | PID Control
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Has anyone out there developed a good PID control program in IC. I didn't want to reinvent the wheel if it was already available. Thanks Bill Denzel (25 years ago, 27-Jan-00, to lugnet.robotics.handyboard)
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| | Re: colour sensor
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(...) I have typically used phototransistors rather than CDS photocells but both will work depending on the application. Sensors are like computer programs, when they do one thing they are fairly easy, if they do multiple things they are more (...) (25 years ago, 26-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Ceramic resonator for mini board
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(...) I searched their site and got the SMD components only for some reason. But the part you want is in there. Try either PX800-ND or PX800MC-ND I'm not sure what the difference is. the 'MC part looks like what I've used but the Manual states that (...) (25 years ago, 26-Jan-00, to lugnet.robotics.handyboard)
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| | colour sensor
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hi chuck i tried using the photocells i got with the gleason research sensor motor kit. i used red green and blue filter, but the values are almost same (with a variation of 1 or 2). the variation is much more sensitive to the distance between the (...) (25 years ago, 26-Jan-00, to lugnet.robotics.handyboard)
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| | Ceramic resonator for mini board
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Hi all, I am having a problem with the ceramic resonator for the Miniboard and I hope someone out theer may help. In the MiniBoard part list the ceramic resonator is listed as DigiKey part # PX800. However, that is an incomplete part number that (...) (25 years ago, 26-Jan-00, to lugnet.robotics.handyboard)
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| | MIT 6.270 robot design competition, Thursday, Jan 27
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hi everyone, the mit 6.270 contest is this week. it's open to the public; you just show up. the official start time is 6 pm. that means you must get there between 4 and 5 pm, depending on how good you'd like your seats to be. typically, all the (...) (25 years ago, 26-Jan-00, to lugnet.robotics.handyboard)
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| | typos corrected in README for 6.270 SPWM routines
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Sigh...you proofread and proofread, and still you miss typos... I found and fixed some in the file ftp://junior.apk.net...0_SPWM.TXT So, if you grabbed it yesterday, grab this one again today. Sorry for the inconvenience. *Rich* (25 years ago, 25-Jan-00, to lugnet.robotics.handyboard)
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