 | | Frob nobs and IR
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OK...Im now pretty happy with states of things but I still have a few questions I hope you can help me answer. The code attached works and everything, but only when i take the bit about playing the songs out. problem 1) It keeps saying that play is (...) (27 years ago, 22-Mar-98, to lugnet.robotics.handyboard)
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| | Re: vector 2x compass
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Mike, U11 is the motor driver nearest the start button that drives motors 2 and 3. The #2 pin is the second pin back on the chip nearest the start button. See page #2 of the Handyboard assembling manual. I followed Tom Brusehaver instructions at the (...) (27 years ago, 22-Mar-98, to lugnet.robotics.handyboard)
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| | vector 2x compass
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I am trying to wire up my vector 2x compass and i had a question. It looks as if everything is wired to the SPI port, however to actually poll the compass you need to make p/c go low (pin 5 on the compass) On the schematic it shows that i should (...) (27 years ago, 21-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Connecting a second sonar module
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In response to my question about connecting two Polaroid sonar modules to the HB... At 08:51 AM 2/5/98 -0500, Fred Martin wrote: <snip> (...) Could someone please explain to an electronics bonehead like myself the following: (1) What is meant by (...) (27 years ago, 21-Mar-98, to lugnet.robotics.handyboard)
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| | "Adaptable" robots
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At 01:13 PM 3/17/98 +0100, Jeroen van der Vegt wrote: <snip> (...) I did a little research through the multitude of web sites devoted to BEAM robotics (Biology, Electronics, Aesthetics & Mechanics). It turns out that what they mean by "adapting to (...) (27 years ago, 21-Mar-98, to lugnet.robotics.handyboard)
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| | Sonar.
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Hello, Like Hans Christian Gilje I am interested if anybody tried to connect a Psion (3A) to the handyboard? Also I want to ask if someone can hand me some ideas about troubleshooting the sonar 6500, it gives strange random values, and yes I did (...) (27 years ago, 21-Mar-98, to lugnet.robotics.handyboard)
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| | handyboard and palmpilot
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Hello, I was wondering whether it would be difficult to connect a handyboard with a palmpilot ((URL) They both have serialports and both can be connected to a mac or pc. It could be interesting to be able to trigger external devices by using the (...) (27 years ago, 21-Mar-98, to lugnet.robotics.handyboard)
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| | Shaft Encoder
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Hi All, I was wondering if anyone new of somewhere where I can get a circuit diagram ir info on a shaft encoder. thanks Joshua Wherrett (27 years ago, 21-Mar-98, to lugnet.robotics.handyboard)
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| | Picture of Interface/Charger Board
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Is there a picture of the Interfece/Charger Board online? ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the Advancement of (...) (27 years ago, 21-Mar-98, to lugnet.robotics.handyboard)
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| | handyboard/midi/scripting
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Hello, I am exploring the possibility of using the handyboard as a trigger for scripted macros on the mac. I know there exist different external modules that can be used for sound mixing, video control, etc, that is either connected to the mac (...) (27 years ago, 20-Mar-98, to lugnet.robotics.handyboard)
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| | Re: HBridge LMD18200
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Its a MOSFET based bridge, the Vgs potential needed to put the FETs into full enhancement mode is 11.2v or thereabouts. At lower voltages the FETs operate in their linear range (their Rds value goes up) and they dissipate much more heat. (As Rds (...) (27 years ago, 20-Mar-98, to lugnet.robotics.handyboard)
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| | HBridge LMD18200
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Hello, First thanks for your answers regarding H-Bridges and especially the LM18200. This H-Bridges would be used with 12V DC motors which can sink up to 12Amp each and I have plenty of room to put them. But there is still something that puzle me : (...) (27 years ago, 19-Mar-98, to lugnet.robotics.handyboard)
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| | IR input sensor
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Hey! I was wondering if anyone has written any sort of fairly simple program that can detect another handyboard by using the IR input sensor. Does this require anything else besides maybe an analog IR sensor and the sensor on the board? If you could (...) (27 years ago, 19-Mar-98, to lugnet.robotics.handyboard)
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| | mailing list
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Please remove me from your list> (27 years ago, 19-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Polaroid sonar connector
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Easy solution. Why waste so much time looking for connectors. Just remove the connector and solder some wires to the board and run those wires to whatever kind of connector you want! -----Original Message----- From: Will Bain <willbain@cs.umt.edu> (...) (27 years ago, 19-Mar-98, to lugnet.robotics.handyboard)
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| | Re: H-Bridge
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Hi talking about the H-Bridge.....we are building one here for a 1.5 kW motor with maximal power output of 2.2 kW. This one works with 400V but is also developped for a current of a little more than 10 A (actually 15A). It will be chopped with a (...) (27 years ago, 19-Mar-98, to lugnet.robotics.handyboard)
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| | H-Bridge
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Thanks everyone..Ill check those out. Im probably not going to do anything that requires soldering things on the handy board. Unfortunatly, im only borrowing this one. I'll just see if i can borrow a rover with less power hungry motors from the (...) (27 years ago, 19-Mar-98, to lugnet.robotics.handyboard)
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| | RE: H-Bridge
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This suggestion isn't even close to what you require, but it may meet the needs of others on the list who are looking for an alternative H-bridge: (URL) can go to 3.5A at 35vdc, and is serially controlled. I don't think it would be hard to build a (...) (27 years ago, 19-Mar-98, to lugnet.robotics.handyboard)
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| | defer() ?? [DAT]
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(...) The defer function is used in multithreaded programs when one process doesn't require all the processor cycles that it would ordinarily be allotted. Typically, if you have multiple processes (threads, tasks, whatever) running at the same time, (...) (27 years ago, 19-Mar-98, to lugnet.robotics.handyboard)
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| | defer() ??
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Hi ! Does anybody know how the defer() function works ? Also, what are its applications ? Thanks, Sudeshna * %%%...%%% * * * * Sudeshna Banerjee, * * E-mail :sxbanerj@cs.twsu.edu * * @ee.twsu.edu * * * * %%%...%%% * (27 years ago, 19-Mar-98, to lugnet.robotics.handyboard)
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| | Re: H-Bridge
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Hello François, HandyBoard group, We had a similar problem when we tried using an R/C model as a mobile base platform for our robot. Searching the net turned up the LMD18200 (3A, 55V H-Bridge) from National Semiconductors, which was suitable for (...) (27 years ago, 18-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Power
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Richard wrote:<snip, stuff deleted> (...) Ah, that takes me back a bit. I built one in the late 60's from plans in Practical Electronics, used about 40 transistors and mechano bits. Its collision avoidance sensor was based around an OCP71 photo (...) (27 years ago, 18-Mar-98, to lugnet.robotics.handyboard)
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| | H-Bridge
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Hello, I am also searching for a preassembled H-Bridge (12 Volt max 10 Amp in continuous mode). If anyone knows a good place to order one, I would be very interested. (We already tried to build the H-Bridge from Chuck Mac Manis but its components (...) (27 years ago, 18-Mar-98, to lugnet.robotics.handyboard)
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| | H-Bridge
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It is clear to me that if i even attempted any work with construction and installation of a H Bridge for my handyboard it would be left a blackened, smoldering wreck. So this is my question.....is there any where to get a preassembled H-bridge from (...) (27 years ago, 18-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Power
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I've built a few of his machines myself. The "Neural Net" is a 74ls244 set up as a shift register with RC networks between each stage. The walkers go forward ok, but can't turn or back up. Mark Tilden's very talented at mechanical design, though! (...) (27 years ago, 18-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Power
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I've been having very good luck with designing an entire robotic ecosystem using only analog components! Predators, Herbivores, plants, the works! (...) (27 years ago, 18-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Polaroid sonar connector
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(...) According to my measurements, the flat flex cable that comes with the Polaroid kits is 1.25 mm (or 0.05"), so it would probably not be quite compatible with the parts that Digikey offers. I looked exhaustively through the Digikey offerings, (...) (27 years ago, 18-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Power
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I didn't see the program, but I have an article my brother cut out of a newspaper and sent me, the guy's name is Mark Tilden, he makes all his robots out of old walkmans and pagers etc. I find his claims kind of hard to believe also. He has a (...) (27 years ago, 18-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Low battery detection
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sure, it will drain the battery, but if it's a low enough drain, you don't have to worry about it. for example if you have a 10 amp-hour battery, drawing .5 mA would take something like 830 days to drain it. I wouldn't worry too much. to calculate (...) (27 years ago, 18-Mar-98, to lugnet.robotics.handyboard)
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| | RE: Nowbody can help me???
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I never say imagecraft C can't use peek and poke???? I can see, you don't understand my mail. Wich i see is : make beep the handy is not simply put a byte in a place into the memory, no way. you have to write a interrupt routine , and do adiitional (...) (27 years ago, 17-Mar-98, to lugnet.robotics.handyboard)
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| | Re: pneumatics
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I think it was the crazy guys in Austin (the ones that put on Robofest) that had a 'portable' air reservoir that consisted of a 2 liter coke bottle, a relief pressure valve and tubing. The coke bottle was filled about a third of the way with water, (...) (27 years ago, 17-Mar-98, to lugnet.robotics.handyboard)
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| | RE: Low battery detection
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Can you translate this into "EE for dummies?". I slowly start to grasp some of the idea about voltage dividers but still don't understand. Won't this setup drain the battery? How does one calculate and wire such a thing - in this particular case? I (...) (27 years ago, 17-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Power
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Perhaps your motors draw too much current. You can only draw 600mA from the L293D driver IC. In the HB manual, you can see you can draw 1A from a IC from TI. (I don't know the exact number right now). You could try to use a seperate IC for each (...) (27 years ago, 17-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Power
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Perhaps the problem is your motor-drivers IC's. If you use the L293D or something, which are standard on the HandyBoard, you can only draw abou 600 mA. I use the other ones mentioned in the HB manual (they're from Texas Intr., but I can't remember (...) (27 years ago, 17-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Power
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Perhaps the problem is your motor-drivers IC's. If you use the L293D or something, which are standard on the HandyBoard, you can only draw abou 600 mA. I use the other ones mentioned in the HB manual (they're from Texas Intr., but I can't remember (...) (27 years ago, 17-Mar-98, to lugnet.robotics.handyboard)
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| | Power
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Hello everyone. I finally got everything cool with the Handyboard I'm using in terms of the software and loading it and getting all connections right. The only problem now is that the motors on my little robot pretty much stop after maybe 45 seconds (...) (27 years ago, 17-Mar-98, to lugnet.robotics.handyboard)
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| | Disconnections etc.
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I have a few problems with the Handyboard I just put together: 1. I lose contact with the board from IC very often. Then, when I try to reset the board it will not always reboot. One of the following usually happens: a) I just get the single line of (...) (27 years ago, 16-Mar-98, to lugnet.robotics.handyboard)
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| | An answer from Polaroid
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A while back I asked if anyone knew about a socket to accomodate the 9-pin plugs that come with the Polaroid sonar modules. I feel pretty dumb now, because I talked with the people at Polaroid, who tell me that it's not really a plug at all; it's (...) (27 years ago, 16-Mar-98, to lugnet.robotics.handyboard)
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| | Re: How i can beep the handy in Imgecraft C....
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Hi German, I sent this to you before, but I guess you didn't keep it. This one is going to both the robot-board and handyboard lists you can always find it again later by searching the archives for these lists. To beep the beeper using ImageCraft C (...) (27 years ago, 16-Mar-98, to lugnet.robotics.handyboard)
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| | Re: pneumatics
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(...) Small pneumatics are tough because commercial actuators are (A) expensive and (B)they assume a stationary machine tied to "shop air", i.e. miniature mobile compressors/regulato.../receivers are nonexistant. HOWEVER; you still have 3 good (...) (27 years ago, 16-Mar-98, to lugnet.robotics.handyboard)
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