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 | | Re: Motor output
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| (...) The motor controls in the Handy Board library supports only 8 levels of power. Upgrade! Get the Smooth PWM version made by Julian Skidmore in the software contributed page on the Handy board web site ((URL) will have to do multiple things: 1- (...) (26 years ago, 28-Oct-98, to lugnet.robotics.handyboard)
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fred
(score: 0.882)
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| | Readings
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| Fred- You left it unclear in an explanation to another letter. You were answering the fellow from India as to what readings one should see when useing a logic probe on the memory chip. You said that if one was stuck at 1 or zero-it might be (...) (26 years ago, 17-Jan-99, to lugnet.robotics.handyboard)
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fred
(score: 0.882)
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| | Re: Question for Fred
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| hello, i use the handyboard for closed loop position control. the handyboard is good for such a task provided that you choose a motor well suited for the task, and an accurate feedback element, such as a (very) linear pot or optical encoder. as for (...) (26 years ago, 9-Dec-98, to lugnet.robotics.handyboard)
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fred
(score: 0.882)
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fred
(score: 0.882)
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| | Re: Question for Fred
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| Hello this is mike, I am writing regarding the handy board. What happened was while working on the handy board, our motor control (the H-bridge) heat sink touch the metal chassis of our robot. This lead to one of the components on our H-bridge to (...) (26 years ago, 9-Dec-98, to lugnet.robotics.handyboard)
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fred
(score: 0.882)
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fred
(score: 0.882)
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| | Re: No heartbeat when switch on
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| did you try reloading the operating program, pcode_hb.s19? use hbdl on windows or 6811 downloader mcl on macintosh. this program (pcode_hb.s19) must be resident on the HB at all times. it sounds like for whatever reason it got corrupted. this isn't (...) (25 years ago, 13-Jul-99, to lugnet.robotics.handyboard)
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fred
(score: 0.882)
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| | Next BayLUG Get-Together in August 1999
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| I am unavailable on the 14th. I'll be in Martinez the whole day, so I vote for the 7th. But I guess whoever starts these things should just decide and the heck with everybody else. It's the only way to do it. Otherwise you're gonna get people like (...) (25 years ago, 12-Jul-99, to lugnet.loc.us.ca.sf)
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fred
(score: 0.882)
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| | Re: Voltage for the DC motor
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| hi, I noticed that the picture of the HB in the Web page is slight different from mine. There is no thick trace on my HB to be cut. However, the HB in the web page has a thick trace on it ? My version of the board is 1995, Fred Martin. Please help. (...) (26 years ago, 31-Oct-98, to lugnet.robotics.handyboard)
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fred
(score: 0.882)
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| | Re: Sonar Sensor Problems
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| (...) The dual sonar interface board is simply a small (1.5" sq. or so) experimenter's PC board from Ripoff Shack with the six power diodes, the one resistor, and three header plugs soldered onto it. One plug goes to the HB and the other two go to (...) (26 years ago, 30-Oct-98, to lugnet.robotics.handyboard)
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fred
(score: 0.882)
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| | RE: Question for Fred
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| That's a funny question. I just finished a class on this exact topic. The basic determining factors when deciding whether to use a stepper motor or a DC brush/less servo motor is speed and open/closed loop control. Stepper motors are limited to (...) (26 years ago, 8-Dec-98, to lugnet.robotics.handyboard)
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fred
(score: 0.881)
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| | Downloading
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| Fred- I'm the one with the HB that always worked with System 7 Mac 11si-now decommisioned. On my OS 8.1 Mac 6500 with Appletalk turned off, useing printer port-I used to be able to use IC253 cosole if the P-code was already Downloaded elsewhere. (...) (26 years ago, 26-Jan-99, to lugnet.robotics.handyboard)
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fred
(score: 0.881)
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fred
(score: 0.881)
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| | The Spi port is fragile?
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| I have a ASAP proximity reader connected to the SPI port. I find some 68HC11 never detect signaling coming from Asap to the SPI port. Others work excelent. Except at 2 or 3 months begin working that fail definitively. I replace the 6811 but nothing (...) (26 years ago, 8-Nov-98, to lugnet.robotics.handyboard)
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fred
(score: 0.881)
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fred
(score: 0.881)
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| | RV: The Spi port is fragile?
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| Anyone can help me? I have a ASAP proximity reader connected to the SPI port. I find some 68HC11 never detect signaling coming from Asap to the SPI port. Others work excelent. Except at 2 or 3 months begin working that fail definitively. I replace (...) (26 years ago, 10-Nov-98, to lugnet.robotics.handyboard)
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fred
(score: 0.881)
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| | Re: MacFrugals
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| I was at Winchester TRU last night and they had about 30 to 40 poly bags strewn about the store. I think I saw 2 separate locations. All of the mentioned ones are .97. They had alot of 6406s, but I bought 5 of 'em. FYI Fred (...) (25 years ago, 27-Jul-99, to lugnet.loc.us.ca.sf)
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fred
(score: 0.881)
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| | Re: R: Reading Serial Port
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| also remember that at 9600 baud or higher, you may not see the flashing of the serial LEDs. try setting the baud rate to 300 or even 110 if you're doing visual-flash debugging. fred In your message you said: (...) (25 years ago, 29-Jul-99, to lugnet.robotics.handyboard)
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fred
(score: 0.880)
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| | Re: moving in a straight line with two motors?
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| Daniel Miller wrote in message ... (...) What? (...) This is all fine and well, but I was thinking about something a little less complex. The RCX doesn't have the power to perform image processing and sophisticated feedback control. What I was (...) (26 years ago, 14-Nov-98, to lugnet.robotics)
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fred
(score: 0.880)
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| | Re: What are the *REAL* Y2K sets?
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| (...) [snip] (...) [snip] And for the 2001 product line, a variation on Adventurers: Scavengers! Explore the abandoned ruins of the ancients, searching for food and supplies, but beware the hideous mutant guardians. Featuring Longwhisker the Quick (...) (25 years ago, 22-Dec-99, to lugnet.general)
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fred
(score: 0.880)
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