 | | 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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| | Re: Gear Motors
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(...) Check out Herbach and Rademan at www.herbach.com for surplus DC gearhead motors. They often have 6-24 volt, optically encoded motors for $20-$25 each. J.V. -- ***...*** * John Vaughn Phone: 315-781-3906 * * Dept. of Math & Computer Science (...) (27 years ago, 16-Mar-98, to lugnet.robotics.handyboard)
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| | Re: pneumatics
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(...) The components you're looking for sound exactly like ones that came with my Lego Technic kit. The actuator cylinders come in two sizes (the big one's about the size you're looking for), and there's a compressor cylinder and pressure reservoir (...) (27 years ago, 16-Mar-98, to lugnet.robotics.handyboard)
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| | pneumatics
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does anyone know of a good sourec for pneumatics? Im especially interested in smaller pneumatics, like those about 1-2" long, with a stroke of 1-1.5" Thanks! phil (27 years ago, 16-Mar-98, to lugnet.robotics.handyboard)
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| | Nowbody can help me???
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I can't believe nowbody of the list users know how works the sound routines in the handyboard??? Please, if any have idea of how i can implement that on OTHER C COMPILER (don't interactive C), please anwser to my question. P.D,: Remember , the (...) (27 years ago, 16-Mar-98, to lugnet.robotics.handyboard)
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| | robots rising program
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Hi Guys, Get off the computer and tune to the discovery channel to catch this program comming on at 8:00 cst. I believe it is going to last one hour. Bye Terry P Gathright (27 years ago, 16-Mar-98, to lugnet.robotics.handyboard)
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| | ? Mabuchi RS280 motor
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Hello all, I've connected a mabuchi rs280 motor to the handyboard. When activated with the following command, "motor(0,12);" the motor speeds up and then stops, and the board also beeps. the ratings for the motor are as follows voltage range 6-9 (...) (27 years ago, 16-Mar-98, to lugnet.robotics.handyboard)
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| | RE: IC Pointer Questions
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Hi, thanks for your reply ... Why don't I use the encoder0_counts variable ? I want to create a multi-tasked environment with seperate processes for each wheel to calculate wheel speeds. The same code will be used to calculate speed for 4 wheels. (...) (27 years ago, 15-Mar-98, to lugnet.robotics.handyboard)
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| | Re: IC Pointer Questions
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(...) If I am understanding you right... I haven't looked at the encoder routines yet, but I am assuming encoder0_counts is global. Why not, just omit the pointer count from the _encoder struct and just use the global, since you already have it? (...) (27 years ago, 15-Mar-98, to lugnet.robotics.handyboard)
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| | Gear Motors
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I was wondering if anyone has a good source for fairly high quality, low cost gear motors that inteface well with the handy board. Right now i am using a cheap little, current hungry 3v toy bulldozer as a platform. I would love to find some nice (...) (27 years ago, 15-Mar-98, to lugnet.robotics.handyboard)
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| | IC Pointer Questions
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Howdy all, I finally attached an infrared reflectance sensor to my handyboard and it works! With my non-existent electronic experiences I managed to solder a resistance (330 ohms) to a three-legged sensor similar to the four-legged variant mentioned (...) (27 years ago, 15-Mar-98, to lugnet.robotics.handyboard)
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