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Hi to everyone, I just got my Handy Board Kit and going through the very first step of the assembly i found the first problem. In the handy board assembly instructions it describes capacitors C15 and C16 as 4.7uF Tantalum capacitors but in my kit (...) (28 years ago, 17-Jul-96, to lugnet.robotics.handyboard)
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| | Serial Com.
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The FAQ has information on sending and receiving info thru the serial port. My Question is: How do I do the other end in C. This is what I got the computer side of the serial cable: port = open("/dev/ttyS3",O_RDWD); <- THis is from my head, not (...) (28 years ago, 16-Jul-96, to lugnet.robotics.handyboard)
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| | Re: sony ir
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Dirk, Without actually seeing your icb function, it would be hard to determine exactly what is going on. But here are some guesses: 1) When you are modifying control registers in MC, make sure that you use bit commands so that you don't set or erase (...) (28 years ago, 16-Jul-96, to lugnet.robotics.handyboard)
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| | sony ir
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Thanks to Joeo for the hints on caputuring data from the handyboard. I have another question: Why does my sony infrared system stop working after calling a function which I have defined in an icb file? I have a number of functions defined in that (...) (28 years ago, 15-Jul-96, to lugnet.robotics.handyboard)
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| | strange encoder problem
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I'm using a hall effect sensor as a shaft encoder. 8 magnets have been placed on a wheel of my bot, such that they turn the sensor on and off as they pass by. I have written a small program to test the encoder, which makes the robot go forward 10 (...) (28 years ago, 15-Jul-96, to lugnet.robotics.handyboard)
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| | Re: HB
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HI Check for a short between pin 11 of the 'hc374 and +5V. Pin 11 is supposed to be connected to pin 9 of the 'hc138. It is the select line for the 8 flip-flops in the 374. If you have a logic probe, check either of these pins. They should be (...) (28 years ago, 15-Jul-96, to lugnet.robotics.handyboard)
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| | HB
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(...) connections so i am at a loss for knowing which leads to test. (...) (28 years ago, 15-Jul-96, to lugnet.robotics.handyboard)
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| | tables
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Hi, Can anyone tell me how to store a big table of data that the handy board has collected into a file for permanent storage? Thanks, -Dirk (28 years ago, 13-Jul-96, to lugnet.robotics.handyboard)
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| | IC memory map
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(...) Right now, IC reserves 16k for shared code and data space. 8k is for the multitasking stacks and interaction download space, and 8k is for pcode. -- Randy (28 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | Re: Malloc
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8K might be all that IC allows for user global data. The memory map can be rearranged, but only at the compile-time of the IC application. Newton Labs should be able to give you a definitive answer about the memory organization of IC 3.1. -Fred In (...) (28 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | Malloc
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I'm trying to allocate three large arrays to store data in... Such as the following declared globally: char stoA(4000); char stoB(4000); char stoC(4000); and then some code...not very long, just to capture data and store it in these arrays from the (...) (28 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | Re: status of the expansion board
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Hi I think that Fred's idea for the expansion board is OK, but I'd also like to see a "bare-bones" expansion board for those hardware hackers amongst the HB community. What I mean is just a simple board with a few more analog input's, and two sets (...) (28 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | Re:
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(...) search on "h-bridge" they have a H-bridge that can handle 3A @ 55vdc. I don't know if it can be piggybacked with driver transisters or not but the wonderfull part is if you would like they will send you FREE samples (3ea at a shot, with up to (...) (28 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | (no subject)
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(...) No, it will use just one '374 enable. -Fred (28 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | Re: status of the expansion board
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(...) . . . (...) Where can we find out more about the LEGO sensors? Are they part of some specialized kits? Do they sell them individually? Is there an online catalog? (28 years ago, 11-Jul-96, to lugnet.robotics.handyboard)
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| | (no subject)
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Could someone give me info on where I might find high-current (10-15 Amp) H-Bridges? I am willing to build or buy as necessary. My TIP120/125 bridge is working great, but the motors are drawing a bit more than these transistors should be handling. (...) (28 years ago, 11-Jul-96, to lugnet.robotics.handyboard)
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| | unsubscribe
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---...--- unsubscribe arp4@lehigh.edu (28 years ago, 11-Jul-96, to lugnet.robotics.handyboard)
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| | Re: status of the expansion board
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I'm curious as to how the Polaroid sonar and servo circuits will work. Will they simply steal timer lines from the HB's digital headers, or do you have something more complex worked out? For example, will the sonar's ECHO signal still go to a (...) (28 years ago, 11-Jul-96, to lugnet.robotics.handyboard)
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| | status of the expansion board
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Hi all, Many people are asking about the Expansion Board. It has been on the "back burner" because my publisher is demanding text, not technology. But I do plan to release another rev this summer. My ideas about what should go on it have evolved, (...) (28 years ago, 11-Jul-96, to lugnet.robotics.handyboard)
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| | Re: Newbie Questions (Sensors)
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(...) using the LEGO light and angle sensor is non-trival; custom HW and SW drivers are required. See ftp://cher.media.mit...gosens.txt for details. (...) 0-12 inches is hard, but 0-1 or 2 inches can be done with a simple IR reflectance sensor. See (...) (28 years ago, 11-Jul-96, to lugnet.robotics.handyboard)
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| | Re: L293 vs TI 754410
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Hello there. I've piggybacked three chips, for a total of 2.6A (2 1A chips and 1 0.6A chip, piggybacked with heat sink compound slathered between all the chips and between the top chip and the heat sink I've put on it). I haven't had any problems (...) (28 years ago, 10-Jul-96, to lugnet.robotics.handyboard)
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| | Newbie Questions (Sensors)
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Greetings! I have a couple of "newbie" questions if you please: I ordered from LEGO, their "sensor suite". I managed to wire and use the touch sensor. But I am puzzled about the use and wiring of their Light Sensor (9890) and their angle sensor (...) (28 years ago, 10-Jul-96, to lugnet.robotics.handyboard)
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| | Re: Source for LCD's
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(...) From the components supply list at (URL) compatible retail display is the Hitachi LM-052L. Supplier info for Hitachi parts is available at (URL) Other valid manufacturers/part numbers: Alps LDS7A1792A; Optrex DMC16249. (...) Electrically, any (...) (28 years ago, 10-Jul-96, to lugnet.robotics.handyboard)
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| | Re: L293 vs TI 754410
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(...) The TI chips should work fine. You might not get a full 2A, but at least a 50% improvement. (...) The traces can handle it, but the PolySwitch fuse should limit total current to about 4 to 5 A. You might need to remove the fuse and live (...) (28 years ago, 10-Jul-96, to lugnet.robotics.handyboard)
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| | Source for LCD's
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FYI all electronics ((URL) has 3 LCD displays that could be used with the handy board: Optrex DMC-16207 16 char * 2 lines Hitachi LM052L 16 char * 2 lines Sanyo LCM-524-87H4 40 char * 2 lines Price is 12$ each, any model. Can someone confirm (or (...) (28 years ago, 10-Jul-96, to lugnet.robotics.handyboard)
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| | L293 vs TI 754410
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HI Just wondering what kind of success anyone has had with piggy-backing the L293's. My HB came with the TI h-bridge chips and I wanted to know if I could use the same technique. I figure if two chips can be run in parallel, giving up to 2A for each (...) (28 years ago, 10-Jul-96, to lugnet.robotics.handyboard)
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| | Cursor Position
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Hi, I was wondering if there is a way to position the cursor directly. Using IC's printf function works great, but I can't position the cursor exactly where I want it. I'm trying to display a dynamic bar graph and some other information based on the (...) (28 years ago, 10-Jul-96, to lugnet.robotics.handyboard)
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| | Re: Questions, questions, questions......
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(...) The Handy is like the 6.270; both have dig out latches going to the motors. The RW drives the motor ctrl pins directly. A re-write of the system PWM routines could provide finer than 8 levels of control, even w/o needing HW timer lines. (...) (...) (28 years ago, 10-Jul-96, to lugnet.robotics.handyboard)
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| | Questions, questions, questions......
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Hi I've just built my first HandyBoard (thanks for the great service Prabal), and have a few questions (that I can't find in the FAQ). What are the hardware-imposed software differences between the HandyBoard and the 6.270/Rug Warrior boards ? ie it (...) (28 years ago, 10-Jul-96, to lugnet.robotics.handyboard)
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| | re: RE: code
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Me Too ! Jens (28 years ago, 9-Jul-96, to lugnet.robotics.handyboard)
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| | Re: RE: code
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(...) Me Three! (28 years ago, 9-Jul-96, to lugnet.robotics.handyboard)
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| | RE: code
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---...--- From: Jeff Keyzer[SMTP:jkeyzer@calweb.com] Sent: Monday, July 08, 1996 7:30 PM To: Handy Board Subject: code I'm struggling to program my bot. In an effort to make my life slightly easier for myself, I'm searching for any bot code that (...) (28 years ago, 9-Jul-96, to lugnet.robotics.handyboard)
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| | code
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I'm struggling to program my bot. In an effort to make my life slightly easier for myself, I'm searching for any bot code that anyone would like to offer me. I'm especially interested in routines that involve navigation, mapping, shaft (...) (28 years ago, 9-Jul-96, to lugnet.robotics.handyboard)
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| | HB Mail List
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Please add me to the Handy Board mailing list. Thanks, Bill william.carlquist@tek.com (28 years ago, 8-Jul-96, to lugnet.robotics.handyboard)
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| | LegoBUG question: I can't find item # 5146/7
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Dear All, I am writing a purchase request for buying the parts of LegoBUG. I refer to Allen Ambler's list to identify the required items. By looking at the Lego Catalog I was able to find all Lego parts, except the item # 5146 or 5147 ("plates (...) (28 years ago, 8-Jul-96, to lugnet.robotics.handyboard)
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| | IC identification
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I have several IC's that I suspect may be opto-isolators but have been unable to locate any pin-outs/data sheets. I wonder if anyone can help me identify them? They are 8-pin HP IC's with the followin on them: top row, the # 4371 and bottom row, the (...) (28 years ago, 6-Jul-96, to lugnet.robotics.handyboard)
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| | Re: torque requirements of 200lb robot
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(...) In my freshman physics class (back in the stone age :-) we went over the notion of torque and how gears "amplify" torque. And what we showed was that you could move an arbitrarily heavy object with any motor your wanted if you had enough (...) (28 years ago, 6-Jul-96, to lugnet.robotics.handyboard)
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| | (no subject)
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(...) Uh, Wow.. My bot is about 30 - 40 lbs so far.. I have the gear ratios set for a top speed just over walking speed (if all goes as planned). While I cannot verify anything until I get the bugs worked out, I would estimate that the gearing (...) (28 years ago, 6-Jul-96, to lugnet.robotics.handyboard)
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| | Re:
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System User wrote: snip (...) have? I want to move a 200lb platform on 8" wheels. Do you think they could do it? My partner (who also reads this list) thinks I'm nuts to suggest buying two new drills and cutting them into pieces. My resoning is that (...) (28 years ago, 5-Jul-96, to lugnet.robotics.handyboard)
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| | (no subject)
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Oh well, I THOUGHT I was done with my H-Bridge.. It seems to be running a bit hot. I had originally tested the motors with a bench supply, and the current never exceeded five amps, so I thought the TIP 120/125 circuit was "just right". It now seems (...) (28 years ago, 5-Jul-96, to lugnet.robotics.handyboard)
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