 | | 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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