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| Today I was at The Computer Museum, Boston, presenting The Handy Board, and non-commercial controlers called Crickets. The HB was working fine, but one time I turned it on. It diplayed: "IC v3.1 Bet" an the heart stopped beating. It seems as if it (...) (28 years ago, 14-Jan-97, to lugnet.robotics.handyboard)
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fred
(score: 0.057)
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| | Re: Assembling the HandyBoard
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| (...) The whole issue of null (inverted) connections vs. straight-through is incredibly confusing, because you must take into account the gender of the connector (male pins or female pin sockets) in determining whether it is a null connection. Start (...) (28 years ago, 27-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.057)
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| | Re: Assembling the HandyBoard
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| (...) You need that resistor to stabilize the crystal frequency. Try Radio Shack if it is missing from the kit. It doesn't have to be 1/8 watt, 1/4 or 1/2 watt is fine, just make sure it is 2.2 megaohm. (...) So far so good. (...) There is probably (...) (28 years ago, 26-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.057)
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fred
(score: 0.057)
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| | Re: Handy Board Crash
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| (...) Re-load pcode_hb.s19. If the board loses its operating program, when it starts up it runs gibberish, and the value of the motor output latch is randomized. -Fred (28 years ago, 19-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.057)
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| | Re: Newcomer
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| (...) either. some people like the e1 better because it has more flexible timer and counter lines. but the a1 has a simpler bootstrap sequence and is less likely to have compatibility problems with the host computer. (...) No, it's harder than this. (...) (28 years ago, 19-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.057)
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fred
(score: 0.056)
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| | Good Times virus warning!
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| Sorry, I can't help myself. I have a 102 deg fever right now and I am not thinking straight. -Fred ------- Forwarded Message <<Subject: Final warning about the "Good Times" virus>> READ THIS: Goodtimes will re-write your hard drive. Not only that, (...) (28 years ago, 16-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.056)
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| | Re: ir obstacle detector
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| In your message you said: (...) en bounce the IR off walls. yes, but the tv remote technology includes automatic gain circuits, so you have no way of telling HOW FAR AWAY the original signal source is. (...) ough? You can use a simple reflectance (...) (28 years ago, 10-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.056)
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| | Re: (Handy-B) wrong connection...
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| (...) any normal cmos low power 28-pin (JEDEC standard) 32K RAM will work. You do not need a special battery backed variety. you also might have blown the 'hc373 chip, since that is part of the memory circuit. also check the 'hc132. hopefully the (...) (28 years ago, 6-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.055)
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| | Re: Polyswitch Fuse
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| Not a real systematic one -- that seemed to be enough to let motors blast away, but stop real damage from happening if the nicad pack got shorted out. remember, shorting nicads is a real hazard - 50 to 100 amps -- could almost start a car. -fred (...) (28 years ago, 6-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.055)
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| | Re: more downloading
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| Hi Dave, can you try the DLM.EXE (not hbdl) program off the software resources web page? you will have to use the "-256" flag because it defaults to -512 for the e1 version of the 6811 which is probably not what you have. also, if you have windows (...) (28 years ago, 6-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.055)
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| | Re: SPI code
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| (...) Just to be clear: the code I have promised is 1200 asynchronous serial output from the HB (from a pin other than its built-in RS-232 out :-), *not* SPI code. Mike is correct in stating the place for info is the 6811 "pink book." See the HB (...) (28 years ago, 5-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.055)
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| | Re: SPI header
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| The SPI (synchronous peripheral interface) does not do normal RS-232 (aka "asynchronous serial") in hardware. you must write an assembly language driver to do the timing. at some point in january i plan to release a 1200 baud output driver. if (...) (28 years ago, 3-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.055)
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| | Re: Reflectance sensor
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| You can use either. The 180 ohm resistor will make the output LED brighter, which is generally better, unless you make it so bright as to reduce its lifespan. -Fred ---...--- (...) (28 years ago, 22-Nov-96, to lugnet.robotics.handyboard)
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fred
(score: 0.054)
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fred
(score: 0.054)
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| | RE:
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| (...) Isn't that what the SPI is for? Set one up as master, and all others as slaves. Look in the 'pink' book. I don't know of any existing drivers, but Dr. Fred Martin at MIT has stated he will write some Real Soon Now, maybe January. Keep checking (...) (28 years ago, 5-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.054)
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| | Re: mode select pins
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| (...) The HB runs in special test mode to facilitate control of the LCD screen. Read the Appendix B information in the Tech Docs section for more info. -Fred (28 years ago, 19-Nov-96, to lugnet.robotics.handyboard)
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fred
(score: 0.054)
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| | Received handyboard :-( ... ---> ... :-)
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| YES! The handy board 1.2 got another happy user! I received the Handy Board with an American 120/60 adapter instead of an European but except for paying a lot of money for that item being shipped to the bin there are plenty European transform (...) (28 years ago, 5-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.054)
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| | (no subject)
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| this could also be a problem with the cable betw the interface/charger and the host computer. does the green led on the interface go on when plugged into the host CPU? if not, this is indicative of such a cable probl. however, the pwr light on the (...) (28 years ago, 19-Nov-96, to lugnet.robotics.handyboard)
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fred
(score: 0.054)
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