 | | Re: Vector2x SPI interrupt driven code
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(...) Tom Brusehaver, formerly tgb@bnr.com. (...) 45degrees sounds more like a dinsmore device (compass mechanism, and 4 hall effect transistors). I have them, and they are useful for some things. (...) The vector2x is a compass made by Precision (...) (28 years ago, 5-Mar-97, to lugnet.robotics.handyboard)
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| | Servos again.
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Hi. I'm still having problems with my servos and the board. I got the servos connected to the port 9 and the fourth port from the right on the handyboards expansion bus. (Think this is correct) But when i enable ONE of the servos (Only loading the (...) (28 years ago, 5-Mar-97, to lugnet.robotics.handyboard)
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| | Re[4]: phone cord length
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Ooops, You're right of course! Richard ___...___ Reply Separator ___...___ Subject: Re: Re[2]: phone cord length Author: tomb@netperceptions.com at Internet-Mail Date: 04/03/97 13:03 > TTL does NOT go down that line, it is RS232 which is commonly (...) (28 years ago, 5-Mar-97, to lugnet.robotics.handyboard)
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| | Re: IR collision avoidance
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(...) Someone could probably give some very good reasons why 45 degrees is a good choice. For me it was common sense and experiment. Less than 45 degrees from ahead and the angle the IR is hitting the wall is too "shallow" and I don't get a return. (...) (28 years ago, 5-Mar-97, to lugnet.robotics.handyboard)
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| | 567 design help needed
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I am designing a circuit that requires a 567 tone decoder to detect a 500hz signal and I need some help. I don't have any technical manuals available with that chip in it and I need to know how to wire it up. If someone could post a design or send (...) (28 years ago, 5-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Vector2x SPI interrupt driven code
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Not sure who you are? tomb? Anyways, I noticed mention of a compass.... I once looked into the idea of using a flux gate compass to obtain heading info. After finding that the inexpensive (affordable) models would only obtain info at a resolution of (...) (28 years ago, 5-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Re[4]: IR Collision avoidance
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Richard, Thank you for your response. I must admit that my electronics knowledge is limited to basic theory and some practice. I depend on others, such as yourself, who have had more experience. Furthermore, I would greatly appreciate any thoughts (...) (28 years ago, 5-Mar-97, to lugnet.robotics.handyboard)
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| | Re: IR Collision avoidance
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Matt, You mentioned an IR device from Digi-key. Can you expand (part no.) tel phone no. for Digi. Process analog info from IRs to digital data for HB? What IRs are compatible and where might I get this stuff. Your info into this would be greatly (...) (28 years ago, 5-Mar-97, to lugnet.robotics.handyboard)
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| | Vector2x SPI interrupt driven code
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Well it works. A couple people have asked for it. Turns out the stupid V2X docs are wrong again! Like the product, but bad docs will kill it! Even if you don't have a V2X, I have seen enough traffic asking about using the SPI for things on the HB, (...) (28 years ago, 5-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Re[2]: phone cord length
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Don't those tend to have swapped conductors too? I thought that the receiver cords were slightly different from the other cords. You might have to crimp new connectors on the end. -Jeremy (...) ___...___ Jeremy Green jag@world.std.com (...) (28 years ago, 5-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Re[2]: phone cord length
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Speaking of noisy lines, I was thinking of getting one of those telephone cords that's coiled helix-like to colapse the wire. Now that we're discussing this topic, I am wondering if this cord would effect the electronics. The thought came up to me (...) (28 years ago, 5-Mar-97, to lugnet.robotics.handyboard)
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| | Handy Board Users Near Milwaukee?
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Are there any Handy Board users near Milwaukee (Wisconsin)? Any one interested in getting together to discuss "war" stories? Drop me a line, please. -- Clint *** ROBOTIC SYSTEMS, INC. Clint Laskowski, President 10437 Innovation Drive, Ste. 314 (...) (28 years ago, 4-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Re[2]: phone cord length
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(...) One could consider plastic optical fibre for that length. The diameter is small. It is flexible. No shielding required. You could have one for each direction of signal. Motorola had a plastic optical fibre kit years ago. Have fun. ---...--- Ed (...) (28 years ago, 4-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Re[2]: phone cord length
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(...) No, that is wrong; the RS232 is converted to TTL at the serial interface board, so you do have TTL on the phone cord. In any event, I would guess that 50 ft. would not be a problem; we're talking about 9600 baud here which is pretty slow. BTW, (...) (28 years ago, 4-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Re[2]: phone cord length
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(...) No, the MAX232 chip on the charger board converts from 12V RS232 coming out of the serial port to TTL level RS232. What goes down the line to the Handyboard is 5V RS232, which goes straight into the HC11 and at only 5V levels is more (...) (28 years ago, 4-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Re[2]: phone cord length
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(...) On the phone cord between the handy board and the charger/interface card, the signal voltage is TTL levels. There is also charge voltage, and ground in the other wires. RS232 level conversion is done by the MAX232 on this card. (28 years ago, 4-Mar-97, to lugnet.robotics.handyboard)
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| | Re[2]: phone cord length
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TTL does NOT go down that line, it is RS232 which is commonly used at up to 50 feet. However, you might need to use a shielded cable if you use a lead longer than about 10 feet. Richard (28 years ago, 4-Mar-97, to lugnet.robotics.handyboard)
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| | Re[4]: IR Collision avoidance
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Adam, I don't use -5v, I just use a single 5v supply. You have to choose your op-amp carefully - I am currently trying ICL7612 but I'm looking at another sort which might turn out to be better. With a single supply, you have to bias things around (...) (28 years ago, 4-Mar-97, to lugnet.robotics.handyboard)
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| | Re: IR Collision avoidance
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The part number on the device from Radio Shack is "GP1U52X". In our earlier discussions, I thought I made it clear that I was using "the Radio Shack IR detector module", although I may not have quoted the number. If Sharp makes a module without the (...) (28 years ago, 4-Mar-97, to lugnet.robotics.handyboard)
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| | IR xmitter/receiver idea.
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Heres a IR xmitter/receiver idea for you; I've seen this approach used in equipment and it works very well, I'm not sure how well it will work for robotics but believe it can be adapted. This is difficult to explain but easy to build, so hang with (...) (28 years ago, 3-Mar-97, to lugnet.robotics.handyboard)
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