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 | | Re: serial connection
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| (...) and then Chuck McManis wrote: (...) Not necessarily. There could be a problem with the memory circuit that is preventing pcode_hb.s19 from loading properly. Tunde, use a multimeter to check all of the connections in the memory circuit (...) (27 years ago, 23-Apr-97, to lugnet.robotics.handyboard)
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fred
(score: 0.068)
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| | Re: Handyboard to Vector 2X compass
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| OK everyone. I put Tom's stuff online, see the HB HP (handy board home page :-). -Fred P.S. Tom, check your color table the next time you make a GIF. Somehow your black and white schematic GIF got saved with 256 colors (255 blacks and 1 white), (...) (27 years ago, 23-Apr-97, to lugnet.robotics.handyboard)
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fred
(score: 0.068)
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| | To HB or not to HB, that is the question.
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| I've been looking into the HandyBoard, and it looks great. I'm wondering if I could get some opinions here. A friend of mine and I are going to build a robot, and we are trying to decide if we should go with the HB, or make something else. I know (...) (27 years ago, 23-Apr-97, to lugnet.robotics.handyboard)
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fred
(score: 0.068)
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| | Re: Trinty Firefighting
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| (...) I used IR phototransistors. I picked them up at a local electronics surplus. They may have been mediocre in sensitivity as they could only respond to flame a couple of feet away. Putting a magnifying lens in front made a drastic difference, (...) (27 years ago, 13-May-97, to lugnet.robotics.handyboard)
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fred
(score: 0.068)
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| | (no subject)
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| AN OPEN LETTER TO PROFESSORS JAKE MENDELSSOHN AND DAVID AHLGREN, ESTEEMED FOUNDERS OF THE TRINITY COLLEGE FIRE-FIGHTING ROBOT COMPETITION. Wed Apr 23 00:50:42 1997 Dear Jake and Dave, Thank you for organizing such a fantastic robotic event. It was (...) (27 years ago, 23-Apr-97, to lugnet.robotics.handyboard)
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fred
(score: 0.068)
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| | Re: I have a good schematic to post
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| Hi Keith. Send it to me and I'll post it for all. Please send as a GIF not JPG as this is better for line art & text (i.e., a schematic). I can decipher just about any encoding format so use whatever's easiest for you. -Fred In your message you (...) (27 years ago, 22-Apr-97, to lugnet.robotics.handyboard)
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fred
(score: 0.068)
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| | Re: (no subject)
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| Fred Cass, Seems like I remember reading in NUTS and VOLTS, or somewhere, about Randy Sargent and his partners involved in a competiton, using a Radio Shack AM transmitter on their robot. It gave details on how they interfaced it. Sounded pretty (...) (27 years ago, 8-May-97, to lugnet.robotics.handyboard)
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fred
(score: 0.068)
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fred
(score: 0.068)
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| | battery life
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| (1) the memory should last about a month if the board is turned off, as several have noted. (2) please be aware that the serial interface will *DRAIN POWER FROM THE HB* if the interface itself is not plugged into power. thus do not expect anywhere (...) (27 years ago, 16-Apr-97, to lugnet.robotics.handyboard)
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fred
(score: 0.068)
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| | interfacing HB w/Mini-SSC
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| Fred (or anyone), I'm working with a group trying to interface Scott Edward's Mini-SSC II with the HB. By directly connecting the SSC to a computer and running a simple QBASIC program, we verified that the SSC works correctly when it receives proper (...) (27 years ago, 30-Apr-97, to lugnet.robotics.handyboard)
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fred
(score: 0.068)
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| | IC compatibility with PowerBook 520
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| Fred, Your suggestion worked. Appletalk WAS on and inactivating it solved the problem. Thanks a lot. Sincerely, Yoni Garbourg << To succeed, Atificial Intelligence needs 1.7 Einsteins, two Maxwells, five Faradays, and .3 Manhattan Projects." >> (...) (27 years ago, 26-Apr-97, to lugnet.robotics.handyboard)
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fred
(score: 0.067)
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| | Re: Motor Driver Chips
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| The current still goes through the chip. 1 amp max. But now it will get more hot cuz you disipate more power accross the integrated transistors with the higher voltage. I think Fred mentioned that there was a thermal shutdown. (Is this true?) But I (...) (27 years ago, 28-Apr-97, to lugnet.robotics.handyboard)
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fred
(score: 0.067)
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fred
(score: 0.067)
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| | Re: To HB or not to HB, that is the question.
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| (...) I emailed the people at Imagecraft and asked them if ICC11 works with the handy board and they said they are working with Fred Martin on it. I noticed on thier home page that they claim to have LCD driver code in a library of version 4 ICC11. (...) (27 years ago, 24-Apr-97, to lugnet.robotics.handyboard)
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fred
(score: 0.067)
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| | LCD & serial connection
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| Thanks to those of you who sent your suggestions regarding the message below. I tried it all (replacing the LCD, checking each pin on both the RAM and the octal transparent latch 74HC373 for continuity, double checking the installed parts, I even (...) (27 years ago, 24-Apr-97, to lugnet.robotics.handyboard)
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fred
(score: 0.067)
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| | Re:
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| I too was there during the contest though I was not one of the participants. I would like to add that the fire-fighting contest was the very first robot event I have been to. Now I plan to go to some of the other ones this year. Now I know why quite (...) (27 years ago, 23-Apr-97, to lugnet.robotics.handyboard)
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fred
(score: 0.067)
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| | Re: Handyboard to Vector 2X compass
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| C> I'm planning to hook a Vector 2X digital compass to my HandBoard. C> I'm looking for any code for such and interface. It should be C> simple SPI stuff but I've never messed with the SPI before and C> would rather not re-invent the wheel. I've (...) (27 years ago, 22-Apr-97, to lugnet.robotics.handyboard)
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fred
(score: 0.067)
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| | I have a good schematic to post
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| I have finally debugged my IR proximity sensor circuit and I want to post it to the group. My question is what is the best way to post it? I can put it into a JPG file but I don't want to just send it to the whole group at once. Fred, can this go on (...) (27 years ago, 22-Apr-97, to lugnet.robotics.handyboard)
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fred
(score: 0.067)
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fred
(score: 0.066)
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fred
(score: 0.066)
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