 | | 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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