 | | Re: EE RF question
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Yes, that is what I'm trying to do. I think that this would eliminate interferance. Though the price is tethered operation. I guess it doesn't really have to be a coax. It can just be an RCA A/V cable right? Or how about a single wire! ---...--- (...) (25 years ago, 4-Aug-99, to lugnet.robotics.handyboard)
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| | Re: Fischer Technik parts
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Yup, I've boughten from Timberdoodle, and I believe their prices are a bit cheaper than most places, and yeah their service is better than most. --phil -----Original Message----- From: Mihalka, Michael <MihalkaM@marshallcenter.org> To: (...) (25 years ago, 4-Aug-99, to lugnet.robotics.handyboard)
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| | Re: EE RF question
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Pherd, It sounds as though he is planning on patching the output of a RF transmitter to the input of a RF receiver. 73's, Jose -----Original Message----- From: FThompson9@aol.com <FThompson9@aol.com> To: handyboard@media.mit.edu (...) (25 years ago, 4-Aug-99, to lugnet.robotics.handyboard)
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| | Re: IR sensors
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To blink LEDs at 40khz, you could try using the 555 timer. Radio Shack carries the 555 timer chip, a little booklet explaining how to use it, and any external components you need. In addition to the 555 chip, you'll just need three resistors and a (...) (25 years ago, 4-Aug-99, to lugnet.robotics.handyboard)
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| | Re: IR sensors
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I've been using the Miniboard to send and receive IR messages among other things. I find that the board is right on the edges of being fast enough to generate the 40KHz carrier and thus, I don't use it that way. Rather, I use the Miniboard to (...) (25 years ago, 3-Aug-99, to lugnet.robotics.handyboard)
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| | Re: EE RF question
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(...) I'm not to clear on what you are describing here. Generally speaking I would say yes, you can slap a piece of coax in without too much loss of function. But you really need to know what type of antenna your feeding, the radio's frequency, the (...) (25 years ago, 3-Aug-99, to lugnet.robotics.handyboard)
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| | RE: Fischer Technik parts
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Different places depending on where you live. If you live in the US, one place where you can buy many sets is www.timberdoodle.com (a home schooling site but extremely nice people). Otherwise try the mailorder parts service at www.knobloch-gmbh.de. (...) (25 years ago, 3-Aug-99, to lugnet.robotics.handyboard)
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| | Re: Fischer Technik parts
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(...) I have several of the sensor and walking robot kits for sale (unopened... brand new.. etc). They are identical to the ones you see at www.RobotStore.com only with a different box design. If you are interested, please contact me and maybe we (...) (25 years ago, 3-Aug-99, to lugnet.robotics.handyboard)
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| | New GCC-HC11 Compiler Patch (Aug 3, 1999)
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Announcing the latest patch to the gcc-2.8.1 compiler to add an HC11 compile target. The latest patches were submitted to me by Dean Huxley. I finished incorporating his fixes and the readme changes this morning at 1am. Changes include Pragma fixes (...) (25 years ago, 3-Aug-99, to lugnet.robotics.handyboard)
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| | Fischer Technik parts
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Where would one purchase Fischer Technik parts? (25 years ago, 3-Aug-99, to lugnet.robotics.handyboard)
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| | IR sensors
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I have both a miniboard and a Handy board. I have recently purchased some Sharp 40mhz IR detectors to use with these boards. I have very little knowledge of electronics and don't know how to flash the IR LED at a rate that the detectors will need. (...) (25 years ago, 3-Aug-99, to lugnet.robotics.handyboard)
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| | EE RF question
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Hi! If you have an RF Transmitter and Reciever with Antennas, can you detach the antennas and just connect a co-ax cable between them? I'm guessing this would reduce the noise and interferance to a minumum. Is this right? ---...--- ericson mar (...) (25 years ago, 3-Aug-99, to lugnet.robotics.handyboard)
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| | Brand New Gleason Research Handyboard For Sale
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I've just bought a new handyboard, and realized that i'm way over my head trying to build a robot. All i've done so far is perform some software tests to ensure the the handy board & the expeansion board work. I've got one brand new Gleason Research (...) (25 years ago, 2-Aug-99, to lugnet.robotics.handyboard)
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| | Vision on HB
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Anyone tried using a CCD camera vision system on the handy board ? If so how did you go about doing it , hardware , software, wise?Sample code would be great:) Thanx, Alex Stewart (25 years ago, 2-Aug-99, to lugnet.robotics.handyboard)
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| | IC code site
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Update: Things have been really slow so far. I've added the two functions that I've gotten off the list to the archive. I'll be entering code fragments from "Mobile Robots" later in the week. If there are other books out there with IC or easily (...) (25 years ago, 2-Aug-99, to lugnet.robotics.handyboard)
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| | Any one have experence in robotic vision?
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This really isnt a HB question but >>>> Have been reading a few vision books , thay all have formaulas and examples etc but none of them help you with actual code , my actual question is does any one have some example vision code in C or anything? (25 years ago, 2-Aug-99, to lugnet.robotics.handyboard)
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| | Noise on the handy board
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Fred and handyboard experts, I have assembled two handyboards and I am now helping 15 other people build theirs at San Jose State University. I found a problem on the first two I build that I belive causes the Sharp GP2D02 not to work. The school (...) (25 years ago, 31-Jul-99, to lugnet.robotics.handyboard)
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| | Re: Millisecond timing
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(...) See the Polaroid sonar code (from the HB web site) for an example of how to measure timing signals on the TIC3 channel. You initialize with: bit_set( 0x1009, 0x30 ); /* ddrd */ bit_set( 0x1021, 1 ); /* at tctl2, */ bit_clear( 0x1021, 2 ); /* (...) (25 years ago, 30-Jul-99, to lugnet.robotics.handyboard)
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| | Re: Millisecond timing
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The clock speed on the Handy Board runs at 2 Mhz, which is plenty fast enough for most things IF you run the right code. IC, used in its C implementation is too slow to catch anything at 1 ms reliably. However, there are a few simple work arounds. (...) (25 years ago, 30-Jul-99, to lugnet.robotics.handyboard)
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| | Millisecond timing
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I recently bought a Handy Board to use in acquiring time measurements varying by one millisecond. The Handy Board has a clock speed of 2kHz, therefore it should be able to measure down to one half millisecond. What I have found however is that the (...) (25 years ago, 30-Jul-99, to lugnet.robotics.handyboard)
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