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 | | Re: -POWER-GLITCH-
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| Make sure your downloader is configured to download "pcode_hb.s19" and not any of the other variants (eg pcode_r22.s19). Avard, please send me an email and let me know if this solves your problem. -Fred In your message you said: (...) (28 years ago, 26-Jan-97, to lugnet.robotics.handyboard)
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fred
(score: 0.968)
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| | Re: memory not remembering...
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| Ben -- the pin 27 R/W line of the RAM should be connected directly to the R/W line of the 6811. I don't remember the pin # off hand -- it's 7 i think -- but just check the schematic. check the continuity first on the board. if that's ok, then check (...) (28 years ago, 26-Jan-97, to lugnet.robotics.handyboard)
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fred
(score: 0.968)
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| | Re: QRD1114?
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| Digikey. call 1 800 DIGI KEY. add 'QT-ND' to the part number and you get the digikey catalog #. -fred In your message you said: (...) (28 years ago, 5-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.968)
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| | Re: Is 18V correct?
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| this is correct. normal dc adapters are unregulated and there is a reciprocal relation between voltage and current. when you just plug it in and and measure voltage, current is 0 and hence voltage is higher than the spec. if you draw the rated 500 (...) (28 years ago, 29-Jan-97, to lugnet.robotics.handyboard)
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fred
(score: 0.968)
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| | Re: Buncha bouncebacks
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| Sorry, there is nothing I can do about this short of compiling, installing, and configuring brand new mail list software from scratch. The mail list SW my lab provides is very primitive and can't do anything intelligent with bounces. I don't really (...) (28 years ago, 30-Jan-97, to lugnet.robotics.handyboard)
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fred
(score: 0.967)
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fred
(score: 0.967)
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fred
(score: 0.967)
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| | Re: Sample bump sensor routine
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| whether you use analog or digital ins, you don't need the 47k pullup because the hb already has one. just wire the signal line to ground through the normally open switch. bill, i suggest you write your program without using the multitasking (...) (28 years ago, 4-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.967)
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| | blown L293's
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| Bill, I think the moral of the story is: DO NOt use 3v motors with the Handy Board. They draw too much current. Use motors rated at least 6v, even that can be a problem. I should put this in the manual somewhere... See (URL) to buy more L293's. (...) (28 years ago, 6-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.967)
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| | Re: Downloading problems
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| The memory circuit is probably flaky, or, you zapped a 6811 address line output. If you haven't already tried, swap the 6811 with a known good one. If that doesn't work, examine the ram chip addr, data bus, and select signals with a logic probe when (...) (28 years ago, 5-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.967)
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| | Re: IR sensor question
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| As illustrated in the hb manual, the QRD and QRB sensors do NOT use modulated IR light. the sensors as wired just turn on the IR emitter like a little light bulb, and the received sensor value is a combination of reflected IR light and general (...) (28 years ago, 6-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.967)
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| | expansion board schematic posted
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| Hi all, I have put on the web site a schematic drawing of the expansion board as it currently stands. I would appreciate any comments regarding the feature set. In particular, I'm not sure what's best to do with the two digital outputs: * just (...) (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.967)
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| | Re: MEMORY FAULT
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| This problem is answered in the Handy Board FAQ. You are loading the wrong s19 file. -Fred -- This message was composed using Articulate Systems' PowerSecretary, a Macintosh-based speech-to-text dictation system. Please forgive any sloppiness in the (...) (28 years ago, 16-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.967)
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| | Re: expansion board schematic posted
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| It is largely a space issue, not only for chips but connectors. It definitely would be feasible to remove one of the analog muxes and substitute an output latch in its place. Then the specs would be 8 general purpose, 4 hi impedance, 4 LEGO analog (...) (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.967)
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| | Re: Assembler
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| Hello all, I'm working with a friend of mine in the Robotics lab at the UofM to try to interface a Miniboard with a Handyboard through the SPI bus. We're having a fair amount of troubles trying to do it through interactive C. I figure we'll have to (...) (28 years ago, 4-May-96, to lugnet.robotics.handyboard)
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fred
(score: 0.966)
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fred
(score: 0.966)
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| | Re: as11_ic
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| There are two fundamentally different ways to go about writing assembly language programs for the Handy Board: 1. Write them as callable functions for the Interactive C environment, using the as11_ic program. 2. Scrap Interactive C entirely, and (...) (28 years ago, 12-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.966)
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| | Re: Port E inputs
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| the 6.270 has a diff anlg ckt. remember, the app b is generally applicable, but some details are different. -f In your message you said: (...) (28 years ago, 14-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.966)
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| | Re: Motors & handyboard
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| (...) how did you take this measurement exactly? I think 75 mA might be kind of low, most motors will draw this much when they are just spinning but doing no useful work, but then draw much more when they are driving a geartrain. (...) actually, (...) (28 years ago, 14-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.966)
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| | Re: Motors & handyboard
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| (...) 3v toy motors are noisy little buggers and were never designed to be anywhere near a microprocessor. if you reduced the hb motor battery supply to 3v, you might have a chance. at 9v, i really doubt it. -f (...) (28 years ago, 15-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.966)
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