 | | 6500 Sonar and HandyBoard
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Kent, I read your quick explaination of how to connect the Polaroid 6500 sonar board to the HandyBoard, and I have a couple of questions.... Mainly, you mention that the INIT signal plugs into pin 9 of the second motor driver chip socket, and that (...) (27 years ago, 20-May-97, to lugnet.robotics.handyboard)
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| | Re: Soldering...
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This is my case to. I had never soldered before, but it went off with out a problem. Thanks Fred!!!!! GO FOR IT and GOOD LUCK (...) (27 years ago, 20-May-97, to lugnet.robotics.handyboard)
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| | Re: Has anyone built this homebrew sonar ranging board?
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Polaroid OEM Components Group (617)386-3965 $99 for two sets ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the Advancement of (...) (27 years ago, 20-May-97, to lugnet.robotics.handyboard)
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| | Re: Digital Micro Systems
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Everybody, DMSC is run by a nice guy named Prabal Dutta who posts frequently to this list and who isn't evil and as far as I can tell isn't over his head like some "vendors" in the robotics community have been. If you can send email, then sending (...) (27 years ago, 20-May-97, to lugnet.robotics.handyboard)
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| | Re: Digital Micro Systems
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Agreed, its a poor way to do business, 'specially for a small business man, I will not place an order with them again. My students, who need these boards to complete senior design projects and graduate are not happy. - Joe C. (...) (27 years ago, 20-May-97, to lugnet.robotics.handyboard)
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| | Has anyone built this homebrew sonar ranging board?
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(URL) a system similiar to the Polaroid 6500, but costs <$10 to build. Has anyone done it? Should I try it and share the results? (of course I should!) Does anyone see any major drawbacks after reading that, as compared to the Polaroid 6500? Is (...) (27 years ago, 20-May-97, to lugnet.robotics.handyboard)
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| | Re: Digital Micro Systems
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Joseph, (...) I have been trying for two weeks to get a hold of them. None of my messages (phone/email) are answered, and I am still waiting for the parts (high current H-bridges) to arrive. I suppose they still don't have them in stock, but it (...) (27 years ago, 20-May-97, to lugnet.robotics.handyboard)
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| | Digital Micro Systems
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I placed an order with Digital Micro Systems for two complete handyboard systems on 16-April-97. Delivery was promised by 5/12. It has not been received. Three phone calls to their answering machine (is this place ever open?) have remained (...) (27 years ago, 20-May-97, to lugnet.robotics.handyboard)
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| | Re: Generic 68HC11 board question-
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w/o the ds1233, the contents of the ram will become corrupted during power-up or power-down of the 6811. an r/c could protect during power-up, but wouldn't reset the 6811 during power down. remember it's still trying to execute code as system (...) (27 years ago, 20-May-97, to lugnet.robotics.handyboard)
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| | Soldering...
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(...) Mirco >System, since I'm a bit tight with money. However, I'm a bit hesitant >about assembling the kit because I have no experience at all with (...) like the HB before (I'm a software type guy), but thanks to Fred Martin's concise (...) (27 years ago, 20-May-97, to lugnet.robotics.handyboard)
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| | re: Digital Micro Systems
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(...) I called them up a couple of weeks ago to order complete boards, and they said they were backordered on the completed kits, but could send an unassembled kit. So I ordered a kit and it arrived in 3 days. It turned out that I had received a bad (...) (27 years ago, 20-May-97, to lugnet.robotics.handyboard)
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| | Generic 68HC11 board question-
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Howdy- I was wondering about the DS1233 EconoReset thingy- what would happen if it wasn't there and reset was just tied high or through a RC delay to high? Does the DS1233 just add to 'reset stability' or is it important to keep reset from going (...) (27 years ago, 20-May-97, to lugnet.robotics.handyboard)
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| | Re: buying Chips
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(...) Jameco's (www.jameco.com) May-June-July catalog lists them for 13.95 in quantities of 1-9. They're on page 13 but they are the wrong (Dual in Line) package so I'm not sure this helps. Bob. (...) Robert - Bob - Campanini 913/843-6412 2706 (...) (27 years ago, 20-May-97, to lugnet.robotics.handyboard)
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| | buying Chips
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Anyone know where to get a hold of one 6811 microprocessor for around $10? Everything I've seen sofar either wants you to buy in bulk (you have to buy 23 @ $7.11 from Motorolla) or almost $20 for 1 chip. This stinks! Any info would be appreciated. (...) (27 years ago, 19-May-97, to lugnet.robotics.handyboard)
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| | Re: Handy Board Problem: getting hb back into download mode
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(...) Are you holding down the STOP button? With the board powered on, read the voltage at pin 3 of the 6811. When pressing the STOP button, pin 3 should read between zero volts and 0.6v. Releasing the STOP button, you should get 5v. If you get 5v (...) (27 years ago, 19-May-97, to lugnet.robotics.handyboard)
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| | HOW TO UNSUBSCRIBE
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Greetings, This is the periodic message about unsubscribing. Please DO NOT send unsubscribe messages to the whole list. To unsubscribe, send email to fredm@media.mit.edu. Regards, Fred (27 years ago, 19-May-97, to lugnet.robotics.handyboard)
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| | Re: Handy Board Problem: getting hb back into download mode
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Hello, I'm at a loss for what will take to get either of the two boards into DL mode. The board has nothing plugged into it; the BATT and PWR LEDs flash on and then PWR remains on so I can not confirm the synptoms of the ds1233(U12) voltage monitor (...) (27 years ago, 19-May-97, to lugnet.robotics.handyboard)
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| | Unsubscribe
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unsubscribe Have compassion on those who live on earth and He who is in heaven will have compassion on you. God will show no compassion to him who has no compassion towards all mankind Prophet Muhammad (P.B.U.H.) (27 years ago, 19-May-97, to lugnet.robotics.handyboard)
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| | Re: your mail
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(...) Get your soldering iron, some solder labeled electronics use, some old circuit board, and solder away. Or, you could take an old computer board and desolder some components from it, and re-solder them in. Just get in there and do it. You know (...) (27 years ago, 19-May-97, to lugnet.robotics.handyboard)
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| | Re: Vector 2x compass
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A mistake has been found on the V2X schematic, the M/S pin on the compass needs to be grounded. I don't know what it is, everytime I publish something, I make a mistake. (27 years ago, 19-May-97, to lugnet.robotics.handyboard)
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| | Strange HB problems
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Over the past two days I have had two problems with my HB that I can't explain. Maybe you you can help. 1. I wrote a simple program to test out my motors that consists of the motor, sleep, and beep commands. Once in a while I get an error back while (...) (27 years ago, 19-May-97, to lugnet.robotics.handyboard)
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| | (no subject)
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Another note on soldering.. Heat control is VERY important.. Not so much being able to adjust the heat, as having a temperature-controlled iron. The "cheaper" irons get hotter or colder with the load (speed of soldering) as well as the room (...) (27 years ago, 19-May-97, to lugnet.robotics.handyboard)
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| | Re: Soldering (fwd)
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Often novices miss the single most fundamental point about soldering: you don't use the iron to melt the solder (99% of the time) -- you heat the component leads and let them melt the solder. To initially transfer heat effectively to the leads, a (...) (27 years ago, 18-May-97, to lugnet.robotics.handyboard)
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| | Re: Soldering
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(...) experience >at all with soldering. (...) become more >adept at this sort of stuff. And what type of solder should I use? Shane is right, you'll find using very thin solder works much better. Along with a fine tip, you'll want to use a low (...) (27 years ago, 18-May-97, to lugnet.robotics.handyboard)
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| | Soldering/ Second processor
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->Hi, I'm planning to purchase the handyboard as a kit from Digital Mirco System, since I'm a bit tight with money. However, I'm a bit hesitant (...) soldering. The trick is to use THIN 60/40 solder with flux core. Around 0.71 mm thickness is good. (...) (27 years ago, 17-May-97, to lugnet.robotics.handyboard)
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| | Re: Vector 2x giving me lots of trouble...
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Well, I seemed to have narrowed down the problem I was having with the Vector2x compass. It was functioning fine... All I had to do was write clean code that called comp_disable(1) at the end. When my code wasn't doing that, the compass IRQ routines (...) (27 years ago, 17-May-97, to lugnet.robotics.handyboard)
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| | '97 Intel ISEF
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This last week was the 1997 Intel International Science and Engineering Fair (ISEF), held in Louisville, Kentucky. While I don't have a list of winners/losers, I do have some things to say about it. There were five robots in the engineering (...) (27 years ago, 17-May-97, to lugnet.robotics.handyboard)
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| | (no subject)
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Hi, I'm planning to purchase the handyboard as a kit from Digital Mirco System, since I'm a bit tight with money. However, I'm a bit hesitant about assembling the kit because I have no experience at all with soldering. Can anyone recommend something (...) (27 years ago, 17-May-97, to lugnet.robotics.handyboard)
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| | Re: Polaroid software driver
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---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the Advancement of Science and Art ---...--- (...) (27 years ago, 16-May-97, to lugnet.robotics.handyboard)
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| | Vector 2x giving me lots of trouble...
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Hi all, I am having lots of trouble with the vector 2x compass. Sometimes it seems to work fine. Other times it just ouputs zeros (like someone else was saying...). I checked all the physical wiring, and that seems to be fine. The strange thing is (...) (27 years ago, 16-May-97, to lugnet.robotics.handyboard)
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| | Polaroid 6500 sonar and HB...
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Can anyone tell me where I might find instructions for connecting the Polaroid 6500 sonar with the Handyboard? Thanks for any help... -=Fred Cass=- (27 years ago, 16-May-97, to lugnet.robotics.handyboard)
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| | Re: Vector2X compass accuracy?
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The data sheet for the Vector 2x is located at: (URL) have used their TCM2 electronic compass module. I was very please with it's performance and reliability. Vinny Gracchi ---...--- (...) (27 years ago, 15-May-97, to lugnet.robotics.handyboard)
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| | Re: Reading floating point numbers
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Sure Rich, why don't we share your code now. If you want to zip up your files and mail them to me, i'll put them on the HB web site. -Fred (...) c (...) " (...) (27 years ago, 15-May-97, to lugnet.robotics.handyboard)
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| | Re: Reading floating point numbers
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Baggerman, Clinton D. spake unto the ether: (...) Clint, I already have the converse of this problem (i.e., printing floats (and ints) to a remote console via serial_putchar()) solved. I'm currently working with Fred Martin to make these routines (...) (27 years ago, 15-May-97, to lugnet.robotics.handyboard)
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| | Reading floating point numbers
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My problem is that I need to read in a floating point number through the serial port. I tried using the serial_getchar function to read in the number as an int, then convert it to a float, but that was unsuccessful. I also tried altering the (...) (27 years ago, 15-May-97, to lugnet.robotics.handyboard)
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| | Vector2X compass accuracy?
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Could anyone tell me what type type of accuracy/precision you get from the vector2x compass? Does it just return n,s,e,w,nw,ne,se,sw, or a byte? Is there a datasheet somewhere on the web? Thanks for the info! -=Fred Cass=- (27 years ago, 15-May-97, to lugnet.robotics.handyboard)
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| | Re: PCB for Handy Board
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(...) I have ordered the Handy Board from Douglas Electronics. Here is more information 1. Up to date prices for Handy board (most recent version,exclusief shipping) main board : $ 16.00 serial and battery charger : $ 8.00 2. Address : Douglas (...) (27 years ago, 14-May-97, to lugnet.robotics.handyboard)
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| | Trinity Robot Contest.
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Nice pictures. Thanks for sharing them, Fred. Next time maybe someone can put up some mpegs. :) I noticed some things that sparked my curiosity. First, what are those red boxes that quite a few contestants were using...for what appeared to be (...) (27 years ago, 14-May-97, to lugnet.robotics.handyboard)
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| | Penn State
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Bob Avanzato wrote: >I am happy to report that Penn State Abington teams placed 1st, 3rd, and 5th. Bob, Congratulations to you and your team. Well done! I lament there was nothing like this in my school days, but it's nevertheless great to have it (...) (27 years ago, 14-May-97, to lugnet.robotics.handyboard)
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| | Re: Vector 2x compass
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(...) J> I'm still having problems with the Vector 2x compass. I tried J> resetting the compass as Tom Brusehaver instructed and I spent J> some time going over the schematic. It still doesn't work and I J> don't see any obvious problems. I will (...) (27 years ago, 14-May-97, to lugnet.robotics.handyboard)
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