 | | Re: dc motor blues
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Hi All; Along the same lines, I would LOVE to control my motors so they run at constant speed under varying load. I know that it's theoretically possible to sense the RPM of a PM DC motor by tracking the drive voltage as the commutator makes and (...) (26 years ago, 4-May-98, to lugnet.robotics.handyboard)
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| | RE: Connections
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Hmm... I had the same problem and made an only mildly inelegant kludge with straight and right-angle headers. How much do you enjoy soldering? Seriously, does anyone know of any single-row intraconnectors? Brett Anthony Research Technician School of (...) (26 years ago, 4-May-98, to lugnet.robotics.handyboard)
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| | Re: Cannot download pcode on a Mac G3
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(...) Yes. Using the same set of boards, I can download pcode using IC 3.1 as well as IC 2.xxx from my old macintosh Centris 650 as well as from Performa 6100. -Paul (26 years ago, 4-May-98, to lugnet.robotics.handyboard)
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| | Re: Cannot download pcode on a Mac G3
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Hi Paul, This is the first time we've heard of such a problem with IC 3.1 on the Mac G3. Can you verify that it is the case that pcode download works fine for you from other Macintoshes? -- Randy ---...--- (...) (26 years ago, 4-May-98, to lugnet.robotics.handyboard)
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| | Re: Schematic drawing - freeware ???
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Hi Les, i´m using a nice drawing programm (TARGET 2001). In germany we can get a "lite" Version of a big-drawing programm it´ easy to use and it works great, but it is in german. If you are interested, send me a mail tschau bernd (...) (26 years ago, 4-May-98, to lugnet.robotics.handyboard)
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| | Re: Handy Board problem
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I got mine from FutureActive. I don't remember what the cost was and I don't remember what else I got from them, but it was more than just that. I think I placed about 2 orders with them. I would much rather deal with Mouser and Digikey. If you have (...) (26 years ago, 4-May-98, to lugnet.robotics.handyboard)
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| | Re: LCD Addressing - & - Expanded Mode
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I found the driver you sent earlier. Thanks. BTW, I found out that my LCD is good but I still have a problem. It appears that I cannot change my CONFIG reg. Maybe because it is an 811E2; don't know. Should be able to however. Since the program was (...) (26 years ago, 4-May-98, to lugnet.robotics.handyboard)
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| | Re: LCD Addressing - & - Expanded Mode
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Wierd: Anyway I have some kind of problem with the handyboard. All steps up to the testing of the LCD went fine. When I plugged in the LCD and turned it on, it lights up (one line) bright not dim. I tried to download the pcode_hb.s19 with config set (...) (26 years ago, 4-May-98, to lugnet.robotics.handyboard)
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| | Re: LCD Addressing - & - Expanded Mode
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So, this still doesn't help me figure out how to address the LCD. It has A8 and A9 connected along with a CLK from Port A. Does this mean that the LCD is NOT memory mapped? Do I first have to write to Port B then write to Port A, to clock it. This (...) (26 years ago, 4-May-98, to lugnet.robotics.handyboard)
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| | Re: DS1233 Monitor Chip
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(...) I use an MC34064 on a 68hc11, and have never had any problem with it. Philippe Guermeur guermeur@ensta.fr (26 years ago, 4-May-98, to lugnet.robotics.handyboard)
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| | Micromouse speed
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Hi, does anyone know how fast should a micromouse move? and the other question is, will the 6811/handyboard have enough capability (address space) for maze solving? If not, what should I need? extra memory or 32bits processor? Thank you for any (...) (26 years ago, 4-May-98, to lugnet.robotics.handyboard)
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| | Re: Controlling a DC motor 3
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(...) Within limits, the rate doesn't matter much. What matters is the ratio of off time to on time (i.e., the duty cycle). Probably, you could change the frequency by an order of magnitude either way and get about the same results. --Will , , __@_/ (...) (26 years ago, 4-May-98, to lugnet.robotics.handyboard)
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| | Re: LCD Addressing - & - Expanded Mode
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(...) You can only run the LCD when in single chip mode. (...) This leaves the chip in 'special test mode' that lets you go into and out of expanded mode by writing the config register. --Chuck (26 years ago, 4-May-98, to lugnet.robotics.handyboard)
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| | Re: Polarity of PowerJack from HB und Charger Board
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on the interface/charger, since there's a bridge rectifier immediately normalizing the input jack voltage -- regardless of polarity -- it kind of doesn't matter which polarity you use. there is a discrepancy between the int/charger schematic and (...) (26 years ago, 3-May-98, to lugnet.robotics.handyboard)
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| | Re: Cannot download pcode on a Mac G3
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Paul -- have you tried 6811 Downloader? Any luck with that? looks like Randy and I will both need to get our hands on a G3 to debug our code :-) Fred In your message you said: (...) (26 years ago, 3-May-98, to lugnet.robotics.handyboard)
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| | Cannot download pcode on a Mac G3
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Hello everyone, I've been having a problem downloading pcode to a handyboard or rugwarrior board from my Mac G3 (266 Mhz desktop model). When I try to download the bootstrap code, it reports that the bootstrap failed after 000 bytes, etc.. etc... (...) (26 years ago, 3-May-98, to lugnet.robotics.handyboard)
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| | Controlling a DC motor 3
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Thank your for all your replies, I understand what 's going on now Another question about the motor driver is: Q) The PWM is a sequence of pulses switching on & off the H-Bridge. But what should be the rate of PWM? 1000Hz?? why? what does the rate (...) (26 years ago, 3-May-98, to lugnet.robotics.handyboard)
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| | LCD Addressing - & - Expanded Mode
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Two questions: 1) I'm having a little trouble figuring out how the LCD is addressed. It uses A8 and A8 but also is clocked from Port A. Can someone explain how to properly address the LCD using ASM? 2) The Mode B pin is always grounded. How does the (...) (26 years ago, 3-May-98, to lugnet.robotics.handyboard)
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| | recharging a battery the right way
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hello I have a 6v 2.0amp battery. Its a lead acid battery. What is the right way to recharge it? The reason I ask is because I had a 12v 7amp battery from the same manyfacturer. I charged it using a car battery charger at the lowest setting (...) (26 years ago, 3-May-98, to lugnet.robotics.handyboard)
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| | Polarity of PowerJack from HB und Charger Board
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Hi I am wondering about the Polarity of the Power Jack at the Handyboard and the charger board. At the HB the Pin in the middle is ground. At the charger board the outside Ring is ground.Can anybody tell me why it is different ? Thanks (...) (26 years ago, 3-May-98, to lugnet.robotics.handyboard)
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