 | | Handyboard with EPROM
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Can I put a Rom memory in the handy board? I don't need a battery , so i think to remove that and the battery. If is not posible...can add a ROM in a expansion board and download the code in the boot ? Thanks... German Pablo Gentile German Pablo (...) (27 years ago, 20-Aug-97, to lugnet.robotics.handyboard)
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| | servos ?
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Date sent: 19-AUG-1997 17:18:58 Hi, Could someone please give me a specific recommendation of a good servo to use for Lego robots with handyboards. I looked at TowerHobbies and robotShack and was overwhelmed by their lists. (I'm obviously just (...) (27 years ago, 19-Aug-97, to lugnet.robotics.handyboard)
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| | Re: interfacing motors
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(...) One way to accomplish this is with an H-bridge motor drive other than the L293 on the HB itself. I one out of discrete components some time ago, using darlington TIP series transistors, and it works great. (Kudos to Chuck McManis.) It can (...) (27 years ago, 19-Aug-97, to lugnet.robotics.handyboard)
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| | interfacing motors
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hello, all you happy roboters! /I have a question about interfacing a larger motor to the HB. It runs on 6v & draws 1-2amps, depending on the load. I already have a 6v 7amp lead battery that I want to use to power the 2 motors. What would be the (...) (27 years ago, 19-Aug-97, to lugnet.robotics.handyboard)
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| | IR Transmitter
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Hi all, I was wondering if anyone could recommend an IR transmitter for use with the Handy Board's IR output (J7). If possible indicate manufacturer/part no. or supplier/catalog no. if possible. I was also wondering if anyone could tell me how (or (...) (27 years ago, 19-Aug-97, to lugnet.robotics.handyboard)
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| | Muscle Wire
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Hi - Has anyone ever tried using "muscle wire" (nitinol) with the Handyboard? When you pass an electirc current through it, it heats up and rapidly contracts. The wire has a fairly low resistance - would it still be OK to drive it with the motor (...) (27 years ago, 18-Aug-97, to lugnet.robotics.handyboard)
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| | Re: Lcd
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(...) there are 3 kinds of backlighting * LED * electro-luminescent (EL) * cold cathode florescent tube LED and EL are thin panels behind the LCD glass (tho they do add thickness to the final unit). florescent is miniature lamps that go along one or (...) (27 years ago, 18-Aug-97, to lugnet.robotics.handyboard)
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| | Re: Lcd
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The backlit LCD uses lamp behind the display instead of the reflective light. U may check with the following LCD FAQs. All of these introduce you the technology used, pinouts, and programming of LCD. (URL) it helps. Patrick --00---...--- Low cost (...) (27 years ago, 18-Aug-97, to lugnet.robotics.handyboard)
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| | Lcd
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Can anyone tell me the relevent information for choosing an LCD?I want to change mine for a backlit one and would like to make as few modifications as possible so I think I need to know pin outs(is that all?) and I may have to supply an extra +5v (...) (27 years ago, 18-Aug-97, to lugnet.robotics.handyboard)
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| | H-bridge stuff on-line
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I've created a MOSFET version of my H-bridge that is pretty general purpose and with the addition of a small mezzanine board becomes an electronic speed control. There is a web page that describes the PIC servo code at: : (URL) above paper describes (...) (27 years ago, 17-Aug-97, to lugnet.robotics.handyboard)
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| | IR Transmitter
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Hi all, I was wondering if anyone could recommend an IR transmitter for use with the Handy Board's IR output (J7). If possible indicate manufacturer/part no. or supplier/catalog no. if possible. I was also wondering if anyone could tell me how (or (...) (27 years ago, 17-Aug-97, to lugnet.robotics.handyboard)
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| | Re: positioning of robot
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First, my appologies that this posting is off the mailing list's intended topic (the HandyBoard) but as it seems to be drawing a lot of interest I am hoping that continuing it is ok with everyone?) (...) Ok- first a disclaimer - I am not an (...) (27 years ago, 16-Aug-97, to lugnet.robotics.handyboard)
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| | Re: positioning of robot
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I had some questions regarding John Whitten's recent posting about different drive types. (...) How is the math to figure out the narrowest space a vehicle can turn around in done? (What formula -- or formulas -- are used? Don't just give names, (...) (27 years ago, 16-Aug-97, to lugnet.robotics.handyboard)
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| | thanks
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As I just hooked up my Vector 2x compass to my handyboard and it worked the first time, just like my sonar did, I just want to say, thank you all very much for all of the help everyone gives. Thanks -Jim (URL) (27 years ago, 15-Aug-97, to lugnet.robotics.handyboard)
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| | Re: positioning of robot
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I missed the first posting, I liked the summary posted by John Whitten. Youcan take his posting one layer "up" to get at the abstractions if you want. These are: 1. Points of contact with the surface - More increases stability. 2. Drive Train (...) (27 years ago, 15-Aug-97, to lugnet.robotics.handyboard)
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| | Re: positioning of robot
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I think the Tyco ZIG ZAG makes a great platform. It is a treaded vehicle with a center motor/wheel set that moves it sideways. I haven't complete a robot with it yet but you may want to look into it. jm (...) (27 years ago, 15-Aug-97, to lugnet.robotics.handyboard)
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| | Re: positioning of robot
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(...) Howdy- (...) No problem- as long as you get the relevant points across- that's what counts :) (...) Ok- that's a very good basic question. Here are the pluses and minuses for each type of drive system: 2 WHEELS: The two wheel drive system on (...) (27 years ago, 15-Aug-97, to lugnet.robotics.handyboard)
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| | HB sampling rates
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Hello all, Does anyone know the maximum sampling rate possible on the HB for an analog input being polled in Interactive C 3.1? Thanks, Colby (27 years ago, 14-Aug-97, to lugnet.robotics.handyboard)
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| | Re: More juice
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This subject was discussed some time ago. The discussion yeilded the following: When you put two batteries in parrallel on paper, the voltage is exactly the same. In real life, the two bateries will have slightly different voltages and one will (...) (27 years ago, 14-Aug-97, to lugnet.robotics.handyboard)
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| | Re: type conversion
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D> Hello, Does IC do type conversions like C? More specifically, if D> I have a persistent int that needs to become a global float to be D> used by a function, can this code do the conversion? D> persistent int ifactor; D> float factor; D> void (...) (27 years ago, 13-Aug-97, to lugnet.robotics.handyboard)
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