 | | Re: GP2D05 (correction)
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I apologize for the previous mail on the GP2D05 subject. The information I gave was base on my careless assumption (duhh) which was also wrong. Once again, I am sorry for any inconvenience. =o( Rob (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Re: GP2D05
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I am using the GP2D02 which is also identical to the GP2D05 except that on the GP2D05 you can manually set the threshole using the built-in trimpot. I am using Barry Brouillet driver for interfacing to the Handyboard/w expansion board and it works (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Not necessarily the handyboard....
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I have an old 486 laptop and a few motors and sensors lying around...Does anyone know of a DSP board or some other device I could use to interface the motors and sensors to the laptop for real- time data aquistion? (I already have my handyboard (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Re: stalled motor detection
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If a motor stalls, it draws a lot of current (compared to normal operation). You can measure that quite easilyusing dedicated chip, or by measuring the voltage over a small resistor in series with the motor: if more current is draw, the voltage drop (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Re: stalled motor detection
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Shaft encoders are hard to beat. If the wheels are commanded to turn and aren't, that's a good indication that something is screwy. Plus, if you're doing dead reckoning, you need them anyway so they are already there! Gary Livick (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | stalled motor detection
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Hi all, I'm working on a dead reckoning 'bot. I'm not really interested in what the wheels are doing unless they're stalled. Anyone know any good tricks for monitoring the motor current, or should I go with shaft encoders anyway? Thanks! Paul (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Sonar Sensor
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Danny, The Polaroid 6500 is very common, and if you have the expansion board on your HB you have a built in connection. There are drivers on the MIT HandyBoard site. The units are available from Acroname and they also have a good fact sheet. (2 (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Sonar Sensor
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(...) Yep, I've checked out about every page I've seen on this. I just haven't had the time to do it yet. :| As soon as our competition is over and classes settle down (maybe in 3 years :()) I will get a chance to experiment with it. When will you (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Sonar Sensor
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Try the Polaroid sonar sensors available from (URL) HB site has the info on how to hook it up to the Handy Board including the IC drivers. The Polaroid sonar works very well! Good luck, kam (...) ===...=== Kam Leang University of Utah Department of (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Sonar Sensor
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I'm designing a robot detection/obstacle avoidance system. And I want to install some Sonar sensor. I'm wondering if anyone would know of any good sonar sensor that can easily be used with the HB and that give good results? Any info on this would be (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | GP2D05
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Hi Anybody got the GP2DO5 IR module working with the Handyboard (without expansion board) using IC ? I always seem to get a Logic "1" from the detector even if there are no obstacles in front of the detector. Any hints will be greatly appreciated. (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Servo 16 pgm +SPI on HC11
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I have to admit that I have not actually finished the project, work commitments meant that it was shelved for a while. The easiest way to communicate to the HC11 is to use the software from the HB website that allows you to use one of the pins on (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Debugging
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I am developing a course at SJSU using the handyboard as the microcontroller for a competition being held at the end of the semester. This new course have us build the handyboard from scratch and go through the debugging process. I have help some (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Expansion Board and Smooth PWM
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Bill, after unzipping the files, copy all the downloaded drivers into your interactive C Libs directory. These drivers must reside in this directory (drive:\IC\Libs) in order for IC to load them at startup. You will be asked if you want to replace (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Re: motor current trick
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A couple of easy things that you can do to increase the current capabilities of the motor drivers are: (1) replace the L293Ds with SN754410 chips (available from Acroname), and (2) piggyback one H-bridge chip on top of the other to handle almost (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | motor current trick
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I've got a great R/C track vehicle that I want to use as a robot chassis, problem is the 1 Amp motors. I was going to use Kam's suggestion, but then I saw the Sonar schematics. I noticed that the sonar schematics have power coming from the motor (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Sharp GP2D02 with out expansion board
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Gary, Cool! Could you tell me how you wired it up? I'm a real beginner here and don't know exactly what you mean on that web page by: "This example assumes that port PA5 on the Handy Board was connected to the input of the GP2D02 detector and that (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Re: MOTOR DRIVERS
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I also remember seeing people piggybacking the L293s to double the current capability. Thoughts? -chris ----- Original Message ----- From: Fred G. Martin <fredm@media.mit.edu> To: <handyboard@media.mit.edu> Sent: Monday, October 25, 1999 2:26 PM (...) (25 years ago, 26-Oct-99, to lugnet.robotics.handyboard)
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| | line-followers
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Hi all, I would greatly appreciate information on line-followers and oscillating DC wire-followers to use with the Handy Board. Which models are the most practical? Where can I find the specs and instructions for these models? What is the code for (...) (25 years ago, 26-Oct-99, to lugnet.robotics.handyboard)
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| | 64K UPGRADE
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When upgrading to 64K, could that be done when still using Interactive C? By the way, what's the main difference between 2.8 and 3.X versions? Advantanges and Disavantages!!! Thanks, Paul (25 years ago, 26-Oct-99, to lugnet.robotics.handyboard)
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