 | | Re: Expansion interface status
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(...) To Fred and others, I've been thinking about this off and on for over a year now, and since I now have parts I'll finally get my HBs into something more than just board status. Robots eat I/O pins for lunch. Sensors eat input pins and (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: Expansion interface status
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Do you think Scott Edward would consider selling just the processor? The expansion board could be made to accept Scott's processor or an unprogrammed one if someone had a different application. Which processor does he use anyway? The other thing (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: 6 servos and RS232...
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(...) From memory of my designer engineer days, the EIA RS232 specification quotes something along the lines of: logical level RS-232 level zero or idle -3V to +15V one +3V to -15V The spec gave maximum slew rates for signals and such specifics such (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | RE: 6 servos
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You can hook it directly to a PC serial port. Here is the note on it: 1.Controls eight hobby (R/C) servos. 2.Opto input takes RS-232, -422,-485, CMOS and TTL. 3.Baud rate configurable for 2400 or 9600. 4.Addressable up to 32 controllers on one port. (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: 6 servos
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(...) Just to make sure it wasn't a typo...so, the TTL level is "ative low"? Also. Does the Scott Edwards board have the ability to be connected to a computer? or do you need a "TTL to RS232 converter"? (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: Expansion interface status
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(...) Build a 68360 in the expander board, that'll get ethernet, and multiple SCI ports. All the IO anyone should ever need. :-). (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | RE: Expansion interface status
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While I welcome the small kits, they introduce interface issues for beginners, especially if there are multiple kits attached simultaneously - seems like this is a problem the expansion board should be solving rather than causing. The value I am (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | FW: 6 servos
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RS232 is +12 and -12, but most serial ports can work correctly even if the signal is 3 to 5v. I regularly use 3 to 5v level serial signals. If you need to convert low voltage serial to RS232 specs, you can use a chip like Maxim's 232 - see (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: 6 servos
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(...) There are two types of serial voltages: TTL level and RS-232 level. The HB's serial interface board converts from TTL to RS-232 for communicating with the host computer. The Scott Edwards board accepts TTL levels, so an HB pin can drive it (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: 6 servos
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(...) Are the digital outputs at 5v high? I think you mentioned on the HB homepage about the serial interface converting RS232 levels at +12 and -12v to TTL levels (5v). I'm not that familiar with the nitty gritty of RS232 so this kinda puzzles me. (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: Expansion interface status
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(...) Yes. The current status is "on hold" while I rethink the feature set. I'm considering doing something more like Scott Edward's little servo board for HB expansion: that is, a collection of small, physically detached boards. For servo's, I (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Expansion interface status
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Does anyone know the current status of the expansion interface? My poor handy is at capacity for some i/o functions ;-( (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | FW: 6 servos
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This would be a very powerful enhancement to the handy-board. It would obviously allow easy communication between the HC11 and PIC boards. Since my application will use 2+ PICs in addition to the Handyboard, it would allow easy networking of all 3 (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: 6 servos
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This multiple servos thing is reaching FAQ status, and here is how I plan to deal with it. Scott Edwards Electronics sells a cheap ($30 kit, $45 assembled) servo board that drives 8 servos. You can gang them to get 32 servos or even more. The boards (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | 6 servos
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Hi all, I want to build a six legged walking robot using the handyboard. I want to use 6 servo motors for that. I heard that the handyboard can only control 2 servos, but that there is a servo controller board which can control up to 32 servos, (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: So close, yet so far
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(...) But the hearbeat continues on the handyboard, and the software worked before I soldered the Futaba J connector on, hence my thinking that I hurt the board and caused a hardware failure. Could a hardware failure make the board crash at this (...) (28 years ago, 21-May-96, to lugnet.robotics.handyboard)
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| | Re: So close, yet so far
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This is almost certainly software. your i23o123.icb file is trashing the interrupt vectors and the board crashes. -f (...) (28 years ago, 21-May-96, to lugnet.robotics.handyboard)
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| | So close, yet so far
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AAaarghh. I soldered in the final connections for the outgoing pulse-trains from TOC2. I use the Handyboard to take in pulse trains on IC2 and IC3, massage the numbers, and output the massaged commands on OC2 and OC3. Only the signals go through the (...) (28 years ago, 21-May-96, to lugnet.robotics.handyboard)
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| | european handy board users census
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european handy board users, please send me an e-mail, i would like to ask you a few questions. ******** thanks in advance silvain pinot (living in france and wondering if yes or no he will build a handy board) (28 years ago, 21-May-96, to lugnet.robotics.handyboard)
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| | Re: your mail
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(...) Ghostscript for the Amiga is pretty unusable. I tried it quite a while ago, and got thoroughly sick of it. My solution was to start using my parents' Pentium. :-) (28 years ago, 20-May-96, to lugnet.robotics.handyboard)
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