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We had been building a handyboard(hb) but we have severe problems, We download the buffalo using the hbdl windows downloader (dl indicates a serial timeout, dlm just hangs up). When Buffalo is succesfully loaded (it sometimes halts with a error in (...) (25 years ago, 30-Jun-99, to lugnet.robotics.handyboard)
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| | Re: Moving Straight
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So far nobody has mentioned using a compass to control the 'bot's heading. (URL) Nick (...) (25 years ago, 29-Jun-99, to lugnet.robotics.handyboard)
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| | RE: LM35 Temp Sensor
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The output pin of the LM35 gives you the ambient temperature in 10mV/degree C directly. The 47k pullup resistor will form a voltage divider with the output. You either have to do some conversion (complicated) or eliminate the pullup (easy).... Paul (...) (25 years ago, 29-Jun-99, to lugnet.robotics.handyboard)
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| | RE: Moving Straight
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Our first challenge was to get our robot to move ahead straight. There seemed to be a difference in the motor torques. We used shaft encoders and compared the counts every 200 to 500 milliseconds. Slowing down the motor that had a higher count, for (...) (25 years ago, 29-Jun-99, to lugnet.robotics.handyboard)
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| | RE: Moving Straight
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Many people use trial and error to come up with a wheel differencial factor that should always be applied so that even without looking at the encoders the robot should move pretty straight. If you do the compensation on the fly that is OK but during (...) (25 years ago, 29-Jun-99, to lugnet.robotics.handyboard)
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| | Re: Moving Straight
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I use the 9 gram Piezo gyro in my Hand Launch Glider to keep it moving level despite strong wind conditions. Could you use that in your robot as a "Rudder" input? The 9 gram Piezo gyro costs about 9,500 yen here in Japan. That is about $80.00. I (...) (25 years ago, 29-Jun-99, to lugnet.robotics.handyboard)
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| | Re: Quickcams
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(URL) check these guys out they have done what your thinking... good luck phil (...) (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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| | new address
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hi all This note is to let you know that Josh Welber has a new email address. In future you should send mail to jaw@duckrabbit.org I will be canceling my interport address as of the 1st. Thanks josh (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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| | H- Bridges
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Have any of you got some experience with H-bridges? I want to use 2 digital outputs to toggle a motor on/off in 2 directions. Does this sound reasonable? if any of you have a lead on a good web resource, I'd appreciate the URL... K.M. (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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| | Re: Moving Straight
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Try a differential transmission (assuming you're using Lego parts). (2 URLs) motor drives the bot, with both wheels turning at the same rate. The other turns the bot by changing the relative speed of the wheels. Ross M. Tonkens, M.D. Medical (...) (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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| | Re: Moving Straight
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(...) Sorry, I do other things with my controllers than control robots (shame on me!). From other discussions I've seen though, I would think that you could use some feedback from the turning shafts, like optical turns counters or some such. I (...) (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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| | Re: Moving Straight
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Sean ... Probably the best way to maintain a constant heading is to use shaft encoders on both drive wheels ... monitor their rotation ... adjust one motor to give identical turn counts. The book "Mobile Robots: Inspiration to Implementation" by (...) (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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| | 6500 sonar
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A week ago I has using the sonar ranger with the expansion board but without connecting J12 to digital input 7. I had the sonar making the CLICKING sound (which is good) but the numbers that were being displayed onto the LCD were random (not good). (...) (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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| | Re: Quickcams
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Hi Ryan, The Robot Learning Lab at Carnegie Mellon's Robotics Institute has used Quickcams for vision applications. The URL is (URL) not sure how much info is available. But I know it can be done. Michael (...) (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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| | Moving Straight
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Is there anyone who has written or seen IC code that will keep a robot moving straight with 2 DC motors and four side sensors? 2 on each side. The main reason I ask is because one of my DC motors seems to put out more power that the other one and (...) (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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| | chips
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oes anyone have a reliable source of the 68hc11 they are being obseleted by motorola and i can get less than 100... and i work for an electronics manufacturer. thanks phil (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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| | Quickcams
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Hello All- I was wondering if you guys know of anyone that is using a quickcam for a robot. I would REALLY like to see it done... but I don't know where to start. Any help is greatly appreciated. ---...--- Ryan Ziolko Secure Design Center, Motorola (...) (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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| | RE:
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Thanks, Carlos. I will buy a completed board for my project. I don't foresee building a handy board from scratch any time soon. -----Original Message----- From: Carlos Fernandez [mailto:softech@ptdprolog.net] Sent: Monday, June 28, 1999 9:18 AM To: (...) (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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| | Re:
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Don't feel bad. I felt the same way. My background is in PC Windows programming, and this is very very very different and frustrating to get started. If you are still interested you should consider buying a board that is already assebled. Thats how (...) (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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| | (no subject)
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Call me a weenie -- I'm in over my head... anyone in the market for a handyboard? HandyBoard - (board only) Battery Charger Board (board only) Expansion Board Kit Untouched -- didn't even start the project. (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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| | Re: POLAROID 6500 INCONSISTENT
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Bob, I do experience the same thing and taking the average does not work correctly. I compare the "distance" between the values (I have it get three) and throw out the one that is farthest away. Then I take the average of the remaining two. After (...) (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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| | Re: LM35 Temp Sensor
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I have a couple of LM335 that I have tried to use with the miniboard. The numbers I get when converted to Fahrenheit, do not accurately represent the room temperature. The docs mention using a 10K pot to calibrate the sensor. I have not yet tried (...) (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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| | Baud rate of Interactive C
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Hi, has anyone hacked Mac IC 3.1 to change its baud rate? I'm trying to run a radio RS232 link, and it just can't take the data at 9600 baud. Thanks, George Musser georgejr@musser.com (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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| | Re: IC question
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Dear Victor, I'll give you a few hints about what you are trying to do. 1. the "0x" in front of 0x0e is the same as "$" in regular C. It just designates that the number following is in hex format. 2. Fred runs his motor driver chips using addresses (...) (25 years ago, 26-Jun-99, to lugnet.robotics.handyboard)
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| | LM35 Temp Sensor
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Hi, Has someone tried to connect a LM35 temperature sensor to an analog input in the HB, I have had no luck with it, I have plugged it directly to the input and think that maybe is the 47K pull-up resistor the cause of the problem. Thank You José (...) (25 years ago, 26-Jun-99, to lugnet.robotics.handyboard)
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| | building handyboard
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I am building a handyboard and wnat to know if a 470mf capacitor with 16v is ok to use for the board. ___...___ Do You Yahoo!? Get your free @yahoo.com address at (URL) (25 years ago, 26-Jun-99, to lugnet.robotics.handyboard)
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| | Re: V860X speech module
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yes. it sounds like a robot -- don't worry. :-) it's actually a great board, really easy to use, and well-documented. you just send it ASCII english text, and it talks. fred In your message you said: (...) (25 years ago, 25-Jun-99, to lugnet.robotics.handyboard)
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| | V860X speech module
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Hi All: I've been playing with an SPO256 speech chip for my robot ... and I'm not very pleased with the results. Now I'm considering moving to the V860X speech board by RC Systems. (URL) this is for a robot I do NOT want the voice to sound too human (...) (25 years ago, 25-Jun-99, to lugnet.robotics.handyboard)
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| | Vector 2XG
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Hi All ... I'm about to order a Vector 2XG compass for use with my robot. I'd greatly appreciate any hints, tips, code, caveats, etc. that you may have to offer. (URL) in advance, Nick (25 years ago, 25-Jun-99, to lugnet.robotics.handyboard)
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| | POLAROID 6500 INCONSISTENT
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Hello all, I have a Polaroid 6500 connected to the HB in the standard and well documented fashion. It is working and delivers values that approximate the correct distances. However, it is somewhat inconsistent. For example it will return a lower (...) (25 years ago, 25-Jun-99, to lugnet.robotics.handyboard)
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| | Re: 6500 returning dd values
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I'm having the same problem with my expansion board. When I type sonar_display(); the numbers start flashing on the LCD. The numbers are changing rapidly and appear to be both negative and positive. The numbers seem to be random as well. I made sure (...) (25 years ago, 24-Jun-99, to lugnet.robotics.handyboard)
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| | Reove form the listin g
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Hi, Fred ,pls remove me from the HD listing. This is my 10th time to write this termination to you. Pls activate it asap. thank you . rgds, phillip chia philchia@singnet.com.sg (25 years ago, 24-Jun-99, to lugnet.robotics.handyboard)
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| | Remove from the HD listing
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Hi, Fred ,pls remove me from the HD listing. This is my 10th time to write this termination to you. Pls activate it asap. thank you . rgds, phillip chia philchia@singnet.com.sg (25 years ago, 24-Jun-99, to lugnet.robotics.handyboard)
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| | Re: speed control help
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It sounds like you are running open loop. If you use the wheel encoders as feedback devices to close the loop, then you can use the motor control function in your program as a variable to adjust motor control current via PWM to match the command (...) (25 years ago, 23-Jun-99, to lugnet.robotics.handyboard)
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| | Re: speed control help
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lroska wrote: <snip> (...) <snip> (...) <snip> (...) <snip> The easy solution is to avoid using a formula that assumes anything about the motor speed curve (except of course that reducing the motor value reduces the speed). Try using a feedback (...) (25 years ago, 23-Jun-99, to lugnet.robotics.handyboard)
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| | speed control help
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I have a problem that involves speed control. My robot is curently configured for differential steering and have shaft encoders installed on each one for feedback. the shaft encoders generate 64 pulses /rev The motors are PWM using the rug warrior (...) (25 years ago, 23-Jun-99, to lugnet.robotics.handyboard)
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| | serial interface building
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A group of us are building the HB and we are at the serial interface building stage. When we perform the test on the serial interface to get +9 or +10 volts, we are all getting values of up to +8.5 only. Is there a problem or is this normal? Thanks (...) (25 years ago, 22-Jun-99, to lugnet.robotics.handyboard)
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| | GP2D02
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I am having trouble getting the IR sensor to show values on the LCD screen. I am confident that it is finally hooked up correctly. The following is what is included in the list file to automatically download into the board: explego.icb lib_hb.icb (...) (25 years ago, 22-Jun-99, to lugnet.robotics.handyboard)
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| | runtime errors
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What are the meanings of the various runtime errors? Thus far I have gotten 3 and 4, but I am curious as to what the rest are as well. =) Andrea (25 years ago, 22-Jun-99, to lugnet.robotics.handyboard)
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| | Re: Where can I get a Sonar?
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Jens, You can get the Polaroid sonar from Acroname. Their web site is (URL)Hallo, (...) Scott Sherman IT Spec. II St. Cloud State University 720 4th Avenue South Academic Computer Services ECC Building, Room 101 (320) 255-4888 (25 years ago, 22-Jun-99, to lugnet.robotics.handyboard)
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