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 | | Re: Question on analog(). Negative voltage
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| (...) DO NOT SEND NEGATIVE VOLTAGES INTO THE 6811, you will destroy the analog input circuit. Any voltage outside of the 0 to 5 v range is hazardous, unless it is current-limited to a few milliamps. (...) Are you sure about this? On page 49 of my (...) (28 years ago, 5-Jun-96, to lugnet.robotics.handyboard)
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fred
(score: 0.038)
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| | Re: Yup, it works.
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| The PWR light isn't really an indicator of power. It's actually hooked up to the 6811's serial transmit line, so it's supposed to flash when the 6811 is talking serial. the BATT light should always blink when the board is first switched on. It also (...) (28 years ago, 4-Jun-96, to lugnet.robotics.handyboard)
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fred
(score: 0.037)
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| | Re: Yup, it works.
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| (...) I really tried hard to make this clear -- can you explain the difficulty you had? (...) Yup, you are right. You are either the first person to notice this, or the first to report it! (...) Quiescent RS-232 levels are -10v, so the minus voltage (...) (28 years ago, 3-Jun-96, to lugnet.robotics.handyboard)
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fred
(score: 0.037)
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fred
(score: 0.037)
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fred
(score: 0.037)
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| | Re: Help debugging.
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| (...) which pin were you using as ground reference? Maybe redo your test using pin 15 of the Maxim as ground. First check the Maxim is getting good power and ground (pin 15 is ground, pin 16 is +5). Then re-check the voltages on pin 2 (should be +9 (...) (28 years ago, 2-Jun-96, to lugnet.robotics.handyboard)
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fred
(score: 0.037)
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| | (no subject)
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| (...) There should be more than that in the archive -- here is what I get: 0 Aug 24 1994:50 1994 pcode-2.81-dist 0 Aug 24 1994:41 1994 pcode-2.81-dist/pcode 17563 Sep 29 1993:42 1993 pcode-2.81-dist/pcode/foo.s19 2209 Sep 29 1993:24 1993 (...) (28 years ago, 2-Jun-96, to lugnet.robotics.handyboard)
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fred
(score: 0.037)
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| | (no subject)
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| (...) The FAQ is linked from the main HB web page under the title "the Handy Board FAQ", or directly at: (URL) pcode source is at ftp://cher.media.mit...dist.tar.Z and also (URL) should fix that last link, because you'd never find it unless you knew (...) (28 years ago, 1-Jun-96, to lugnet.robotics.handyboard)
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fred
(score: 0.037)
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fred
(score: 0.037)
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| (...) Yes, see the FAQ for a recently added section on the battery charging system. (...) Yes, this is a good idea if you are separately charging the HB's battery. As you correctly surmise, you don't want the two charging circuits contending with (...) (28 years ago, 1-Jun-96, to lugnet.robotics.handyboard)
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fred
(score: 0.037)
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fred
(score: 0.037)
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fred
(score: 0.037)
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| | Re: Fuse on motor power cables
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| (...) All system power, incl. motor pwr, already runs through the existing polyswitch. They're not too fast, so I'm not sure if they'll save you. the motor chips do have over-current protection of their own, though it has been known to fail from (...) (28 years ago, 24-May-96, to lugnet.robotics.handyboard)
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fred
(score: 0.036)
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| Fred, I have FTP'ed pcode-2.81.dist.tar.Z from cher (thanks for getting it back!) within it were the files foo.s19, pcode_rw.s19, lobo.asm, pcode.asm, and some makefiles.. Cool, but the files required for compiling IC 2.81 that I can't find are (...) (28 years ago, 1-Jun-96, to lugnet.robotics.handyboard)
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fred
(score: 0.036)
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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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fred
(score: 0.036)
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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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fred
(score: 0.036)
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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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fred
(score: 0.036)
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fred
(score: 0.036)
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| | (no subject)
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| (...) OK, take a look at (URL) installed a link for you. Also, did you know the IC manual is on the web? It is at (URL) I am not sure, but I would bet there is an implementation of GhostScript for Amiga. Check it out. This would let you view (...) (28 years ago, 20-May-96, to lugnet.robotics.handyboard)
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fred
(score: 0.036)
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| | Re: Digital Outs?
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| (...) See the FAQ: (URL) Alternatively, are there any serial rs-232 facilities available on the (...) This would be easy to do; someone just has to write 6811 machine code to perform async serial out functions. you would be able to use any of the 4 (...) (28 years ago, 19-May-96, to lugnet.robotics.handyboard)
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fred
(score: 0.036)
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