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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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