 | | .asm --> .s19
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Hello I made some changes to the pcode_hb.asm file (by Julian Skidmore for the 100 steps PWM) and I need to compile/assemble it into a .s19 file (pcode_hb.s19) before I can download it onto the HandyBoard. It seems to me that I require both a C (...) (26 years ago, 2-Mar-99, to lugnet.robotics.handyboard)
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| | RE: Polaroid sonar problems
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I also found that my neon light in my magnifying lens lamp caused erroneous readings. When I turned it off or moved it away the readings normalized (gave the correct results). Shielding wasn't effective in this instance. I did completely away with (...) (26 years ago, 2-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Polaroid sonar problems
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(...) I assume that your sonar pings (makes a clicking sound). If so, then you may be getting a premature echo. You might try mounting the transducer in putty to absorb vibration. You could try lengthening the blanking interval to make sure that the (...) (26 years ago, 1-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Bipolar Stepper Motors
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First thing take an ohm meter and "read" your coils. From any wire you should have one other wire at a low resistance and two at a high resistance. This will first determine if you have it wired right. On my steppers the outside two form one coil (...) (26 years ago, 1-Mar-99, to lugnet.robotics.handyboard)
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| | Re: I have made a i2c routine for the handy board
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i would be interested. thanks (...) (26 years ago, 1-Mar-99, to lugnet.robotics.handyboard)
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| | Bipolar Stepper Motors
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Hi, everyone. I was wondering if somebody could help me. I am trying to control a 2 phase bipolar stepper motor. I found a web page at : (URL) talks about controlling bipolar stepper motors. But I just can't seem to make it work. When I use the code (...) (26 years ago, 1-Mar-99, to lugnet.robotics.handyboard)
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| | Re: serial communications
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some days ago i played with this too. i send you my files ... hope it helps ;) /* beginning of serial.c */ int char1; void disable_pcode_serial() /* necessary to receive characters using serial_getchar */ { poke(0x3c, 1); } void (...) (26 years ago, 1-Mar-99, to lugnet.robotics.handyboard)
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| | serial communications
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I want to disconnect interactive C from the handy board and send instructions to it via the hyper terminal on Windows 95. I have followed the instructions given in the HB technical reference. I am confused as to the procedure for accomplishing my (...) (26 years ago, 1-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Mindstorm hacking program
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I heard that someone at MIT created a program that can hack into and advance Lego mindstorm's computer. Does anyone know where i can find this site where i can download the program? =) chen (26 years ago, 1-Mar-99, to lugnet.robotics.handyboard)
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| | RE: Working with Legos
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Servo Tape: Available at R/C suppliers, this is sheet rubber with very strong stickum on both sides. The only problem is that it will creep, so if the part will be under stress you should augment servo tape with either Ty-Raps or a fillet of (...) (26 years ago, 1-Mar-99, to lugnet.robotics.handyboard)
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| | Wheel encoders
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(...) Yes, the pulley wheels near the drive wheels were drilled to accomodate 0.1" dia. disk magnets, available at the local hobby shop. The magnets activate the Hall effect magnetic sensors that are tucked away into the chassis (not easily seen in (...) (26 years ago, 1-Mar-99, to lugnet.robotics.handyboard)
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| | Polaroid sonar problems
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hi! Our group is still struggling with the polaroid sonar. We can't get any coherent reading, only readings that are in the range 470-515, which aren't effected by the measured distance. We have the capacitor and resistor installed as required. We (...) (26 years ago, 1-Mar-99, to lugnet.robotics.handyboard)
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| | (no subject)
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(...) Some time ago I did come across a site that talked about hacking a sonar tape measure. I can't remember where I saw it but I am confident that I had encountered it by searching "sonar" on one of the major search engines. You could be more (...) (26 years ago, 1-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Mindstorm hacking program
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(...) You may want to start off by checking out: (URL) (26 years ago, 1-Mar-99, to lugnet.robotics.handyboard)
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| | 9600 Baud Serial Input Drivers?
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Fred and Others, I got hold of your 9600 Baud Serial Output drivers - thank you very much. Is there anyone from this list who have done the same thing the taking in serial input data using the PORT A pins? And another questions, about serial (...) (26 years ago, 1-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Working with Legos
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Thanks for posting the pics ... great casters! Are you using the pulleys with near the driven wheels to sense wheel rotation? - - - Nick - - - Will Bain wrote: <snip> (...) (26 years ago, 1-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Working with Legos
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(...) No problem--here it is: (URL) pretty sketchy, but I hope it helps. -- Will , , __@_/ \_@__ |/ | /__, o @_/ )\ ) ( \ (\/\\, ~~~...~~~ ' ` ~~~...~~~ ` ~~~...~~~ Wendy Parson, If you steal from one author, it's plagiarism; Will Bain, if you steal (...) (26 years ago, 1-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Working with Legos
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The LEGO purists may not approve of this, but it does work well and it makes it relatively easy to use non-LEGO components. You *do* need to be cautious about what type of glue you use. Many glues will not adhere to the LEGO plastic, others will (...) (26 years ago, 28-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Working with Legos
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I glued a couple of the thin Lego strips to the bottom of my HandyBoard to make it quick and easy to plop the board firmly onto a Lego base yet still have it easily removable. Doing this you must be certain to get the correct Lego spacing, so first (...) (26 years ago, 28-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Working with Legos
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Some of the sensors that I've used easily attach to the the plates & hlocks with holes using a set of tiny nut, bolts, and washer(s). No damage done to any of the components, and easy to change your mind about where you're going to put it. -kr (26 years ago, 28-Feb-99, to lugnet.robotics.handyboard)
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