 | | encoder
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hi, I need to know what is really the 'processing time' that used in encoder especially used when a pulse is actually being recorded. I load the file "encoder.lis" into the standard lib file. I'm using a optical encoder which is a slotted wheel. (...) (26 years ago, 13-Nov-98, to lugnet.robotics.handyboard)
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| | (no subject)
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Hi all, Ok now i know how to charge my NiCad batteries i have laying around. Thanks to Brett and Scott for the info. I have been doing my sums to try and work out the series resistor i need to charge a 2Amp NiCad at C/10, but my figures dont seem (...) (26 years ago, 13-Nov-98, to lugnet.robotics.handyboard)
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| | Re: questions
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(...) Thanks for the info and the code. got it. But I need something like an implementation of Proportional-Integral Controller or P-I-Differential Controller (Feedback Control Loops), which we always see on any control books. Thanks in advance. (...) (26 years ago, 12-Nov-98, to lugnet.robotics.handyboard)
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| | Re: questions
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(...) Sure. I wrote the attached program to keep my robot tracking in a straight line (it used to arc across the floor). It's not very elegant code, but it works. Note that some of the constants will need to be tweaked for your particular (...) (26 years ago, 12-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Connecting two HandyBoards through their serial ports
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Gads Bill, you are right and my info in the FAQ is dead wrong. I have updated the FAQ with the corrected information. *Thanks a lot* for working this one through. There are few things more annoying than completely wrong documentation (compiler bugs (...) (26 years ago, 12-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Connecting two HandyBoards through their serial ports
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Hello, everyone: Richard Drushel helped me solve the problem that I was having in getting two HandyBoards to communicate through their serial ports by suggesting that I check to be sure that the wiring on the RJ11 cable I was using corresponded to a (...) (26 years ago, 12-Nov-98, to lugnet.robotics.handyboard)
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| | questions
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???...??? Does anyone have a PID Control code in Handyboard? (I mean using the smooth PWM and shaft encoder routine). Thanks in advance. joema (26 years ago, 12-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Monitoring household power consumption
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(...) energy (...) power (...) results (...) true (...) showing the (...) the (...) round (...) Right. If you're trying to do that, good luck!!! If I ABSOLUTELY had to do that, I would try to use the reflectance of the disk. On the black spot I (...) (26 years ago, 12-Nov-98, to lugnet.robotics.handyboard)
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| | RE: Monitoring household power consumption
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I purchased a power meter from Brand electronics. They have a few different models. There is one that is suitable for measuring the costs of one device and there is a larger one that has to be hardwired into your house. Check out (URL) are pretty (...) (26 years ago, 11-Nov-98, to lugnet.robotics.handyboard)
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| | Handy Board PLease!!
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If Anyone is selling ther Handy Board Please Tell me!! I rreeeaaally neeeeed it for some Science Proj..! thank you! (26 years ago, 11-Nov-98, to lugnet.robotics.handyboard)
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| | RE: Monitoring household power consumption
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Actually, that little black band is a relic of earlier days when people (like myself) had jobs that occasionally required them to sit with a stopwatch and count turns. A slide rule was then used to calculate power consumption. Each meter had a (...) (26 years ago, 11-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Monitoring household power consumption
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(...) Good application, although it is a bit of a challenge. (...) Do you want to measure the individual devices, or the whole house? To do the individual devices you would have to have sensors right next to the devices. To monitor each circuit in (...) (26 years ago, 11-Nov-98, to lugnet.robotics.handyboard)
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| | Wrong chip on handy board?
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Hi, I was trying to use the digital inputs for my project. Whether I ground the inputs, or I connect them to high, a read from 0x7fff gives me "76". (My connections are correct, as per your drawing in this mail archive). I finally discovered, that (...) (26 years ago, 11-Nov-98, to lugnet.robotics.handyboard)
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| | Monitoring household power consumption
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In the interest of reducing my reliance on the commercial power grid for my home's electrical power requirements I want to consider switching to more energy efficient devices and to at least partial solar power or other alternative power sources. To (...) (26 years ago, 11-Nov-98, to lugnet.robotics.handyboard)
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| | Handy Board
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Hi.. If you wanna sell your handy board. Please Tell me! I really need it for some Science project Thank You Verry Much. (26 years ago, 11-Nov-98, to lugnet.robotics.handyboard)
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| | RV: The Spi port is fragile?
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Anyone can help me? I have a ASAP proximity reader connected to the SPI port. I find some 68HC11 never detect signaling coming from Asap to the SPI port. Others work excelent. Except at 2 or 3 months begin working that fail definitively. I replace (...) (26 years ago, 10-Nov-98, to lugnet.robotics.handyboard)
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| | Unix sources for dl for E1
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I have been using various boards (6.270, Handyboards and fingerboards) for a long time and on various platforms (Macintosh mainly). I am willing to use my handyboard from linuxPPC on my macintosh, so i recompiled dl, ic and mon. It works fine with (...) (26 years ago, 10-Nov-98, to lugnet.robotics.handyboard)
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| | RE: Charging Batteries
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The HB wall plug charger MIGHT do the job, sort of... Generally you need a charger that makes about 15V under load to charge a 12V (nominal) battery pack. Do NOT use an auto battery charger unless you have a way to reliably control the CURRENT to (...) (26 years ago, 10-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Charging Batteries
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No. You need to limit the current going through the nicad when you charge it. Typically it's some relatively small fraction the the current the battery can supply. Car battery chargers can supply a LOT of current. Hooking a small nicad to a car (...) (26 years ago, 10-Nov-98, to lugnet.robotics.handyboard)
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| | Serial communication between HandyBoards
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Hello, everyone: One of my students and I have been trying to get two HandyBoards to talk to each other over their serial ports, but we are having trouble. We first wired a 4-wire modular connector the way the FAQ says to. No smoke -- a good sign. (...) (26 years ago, 10-Nov-98, to lugnet.robotics.handyboard)
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| | Great Battery Opportunity!? & External Motor Power Question.
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Hi all, I just got my Tech America catalog in the mail (1-800-877-0072). On the back cover they have this 'portable power' thing which just might be able to be used for a robotics application...for only $30!!! Here's the specs: 8 Amp Hour sealed (...) (26 years ago, 10-Nov-98, to lugnet.robotics.handyboard)
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| | Charging Batteries
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Hi all, Just a quick question on charging different types of batteries. I have got a 6Amp 12Volt Nicad battery out of a security alarm panel, can i charge this using a normal lead acid charger that normally charges car batteries, If not what is the (...) (26 years ago, 10-Nov-98, to lugnet.robotics.handyboard)
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| | RE: IR output connection
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The GPIU58X is not an IR proximity switch but the hack provides an analogue level relating to the intensity of the received signal. Novasoft also sell the IR receivers (it's where I got mine from and I'm based in the UK). The address of Novasoft is (...) (26 years ago, 10-Nov-98, to lugnet.robotics.handyboard)
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| | RE: IR output connection
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Hi John, Just read your message about IR ranging. Do you have a site address as I can't seem to find the site using a web search, also what is the usual working range for standard IR collision detection as I have been looking through some catalogs (...) (26 years ago, 10-Nov-98, to lugnet.robotics.handyboard)
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| | RE: IR output connection
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Using a 'hacked' GPIU58X (see Novasoft website for acrobat file describing changes required) you can get an analogue reading relating to the distance from an object. The transmitting LED has to be modulated at the correct frequency and should be (...) (26 years ago, 10-Nov-98, to lugnet.robotics.handyboard)
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| | IR output connection
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Hi All: With a lot of help from you all , I am finally able to send out a modulated signal from one HB which the other can recognize. :) Now I am trying out obstacle avoidance using the IR. I tried to use the standard ir_detect() function with the (...) (26 years ago, 9-Nov-98, to lugnet.robotics.handyboard)
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| | Machine vision -Reply
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(...) Has anybody had any experience interfacing machine vision systems to a robot controlled by a handyboard? The German company Joker Robotics does something using a QuickCam style camera interfacing an HC11 board robot. I think they use the (...) (26 years ago, 9-Nov-98, to lugnet.robotics.handyboard)
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| | Teaching IC
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Does anybody know of a emulater for IC that can be used to teach IC without having the board connected? ___...___ Ian Roberts Mechanical & Manufacturing Engineering Swinburne University of Technology Hawthorn, Vic 3122, Australia. phone (61)(3) (...) (26 years ago, 9-Nov-98, to lugnet.robotics.handyboard)
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| | Machine vision
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Has anybody had any experience interfacing machine vision systems to a robot controlled by a handyboard? (...) (26 years ago, 9-Nov-98, to lugnet.robotics.handyboard)
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| | The Spi port is fragile?
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I have a ASAP proximity reader connected to the SPI port. I find some 68HC11 never detect signaling coming from Asap to the SPI port. Others work excelent. Except at 2 or 3 months begin working that fail definitively. I replace the 6811 but nothing (...) (26 years ago, 8-Nov-98, to lugnet.robotics.handyboard)
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| | Lasers
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Hi: Has anyone ever worked with laser beams and making handyboards recognise them? I think the wavelength is around 600 nm but I haven't been able to come up with a sensor which could recogonise the laser signal alone and no other signal. Rajbala (26 years ago, 7-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Science Interest
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(...) This idea sounds very interesting, but I see 2 problems... First, a GPS reciever doesn't actually contain a compass, so it cannot correctly point you to another location while you are standing still. To determine what direction its facing, a (...) (26 years ago, 7-Nov-98, to lugnet.robotics.handyboard)
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| | RE: Some Parts
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Drew, I just got through finding all of the stuff during the last 2 weeks: B.G. Micro has the 68HC11 and the 32K static (great prices, too). Newark has the Dallas Semi voltage monitor and the TI motor drivers ($20 minimum order). One other option (...) (26 years ago, 7-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Science Interest
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Robbie Berg and Capt. Jack Rutledge: I'm a big fan of the Handy Board, but you might want to also consider using a 3Com PalmPilot. The current model, Palm III, has a backlit 160x160 graphics display, a 2MByte memory, and while I haven't used it, (...) (26 years ago, 7-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Some Parts
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Drew, Last year I was involved in getting parts for the Missouri Area Robotics Society. We were making boards as a club project. I found most of the parts from Digi-key and Mouser Electronics. The rest came from: Wirz Electronics, JDR Micro devices, (...) (26 years ago, 7-Nov-98, to lugnet.robotics.handyboard)
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| | Re: To step or not to step
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Russell , Having that encoder will help you a lot. One of the biggest problems with using steppers is that they will stall when you get to higher speeds. What ever program you use to drive the steppers should have a part that asks "has it made the (...) (26 years ago, 7-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Science Interest
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Although not sure, I think that a wearable could perform better then a palm pilot for the firefighting task. Here are some pointers: [Georgia Tech] (URL) Lab] (4 URLs) [UoToronto] (URL) it helps, Ozan (26 years ago, 7-Nov-98, to lugnet.robotics.handyboard)
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| | Follow-up on DS1233 problem
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Hello, all: Just following-up on yesterday's message about the HB resetting during the initial download. Removing the DS1233 and replacing it with a reset switch produces a working configuration. There was also one stuck digital input, but swapping (...) (26 years ago, 7-Nov-98, to lugnet.robotics.handyboard)
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| | Re: nicad battery
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It might take a bit longer to charge but I don't see a problem I actually use a 12V 3AH gell cell to power my robot and Handy Board -----Original Message----- From: Pat Benoy <benoy@SLU.EDU> To: handyboard@media.mit.edu <handyboard@media.mit.edu> (...) (26 years ago, 6-Nov-98, to lugnet.robotics.handyboard)
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| | Re: To step or not to step
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I encountered the same problem with the DC motors I use on my robot. I used a reflective type encoder that read a black and white stripe of the driving wheels, but did not work reliably due to lack of resoulution and interference from ambient light. (...) (26 years ago, 6-Nov-98, to lugnet.robotics.handyboard)
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