 | | Re: downloading the pcode during assembly
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It is possible that the pins of the 68HC11 chip are not making good contact in the socket. To fix the problem remove the chip, take a sewing push pin and make a hook in the tip. Use it to very gently pull out each pin connection in the CPU socket. (...) (24 years ago, 16-Jan-01, to lugnet.robotics.handyboard)
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| | 2x20 Optrex LCD for my handyboard
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Hi, I recently purchased a 2x20 LCD pannel for my Handy Board, I need to know how to modify the pcode to take advantage of the new screen, Can anyone help? (24 years ago, 16-Jan-01, to lugnet.robotics.handyboard)
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| | as11_ic on unix now mailing to make icb properly.
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Hi, I am on the unix platform for development. I am working on 1-wire network code for the handyboard (in assembly) I'm getting Unrecognized Mnemonic errors and value truncated errors. I then decided to assemble speed.asm, and noticed I get the same (...) (24 years ago, 16-Jan-01, to lugnet.robotics.handyboard)
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| | Re: hacking servo motors
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(...) Hi all, why so complicated ? Use a pair of gears to double the turn ability. We had the same problem (to find a beacon) and succesfully build it. I guess you don't have to be 1 degree accurate, or ?? I think 2 degrees will work. (You don't (...) (24 years ago, 16-Jan-01, to lugnet.robotics.handyboard)
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| | Re: hacking servo motors
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It's just an ordinary motor after you modify it to take out the feedback device, and you have no idea of where it is pointing at any time. Maybe you could have the robot turn in a circle to find the beacon? Or use a small stepper motor? You can (...) (24 years ago, 15-Jan-01, to lugnet.robotics.handyboard)
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| | hacking servo motors
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Hi, I am trying to implement a auto recharge system for my robot. i am using a homming beacon on the recharging station and whenever myrobot is out of charge it has to find the that beacon. to scan the area i need to use the sero motor. i never used (...) (24 years ago, 15-Jan-01, to lugnet.robotics.handyboard)
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| | Re: 2 RealTimeJava for the 68HC11 Questions
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Yes, I bought one in kit form from www.acroname.com (whom I highly recommend). As far as what else it can do, I would suggest visiting www.handyboard.com to read more about it. (...) (24 years ago, 15-Jan-01, to lugnet.robotics.handyboard)
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| | Dallas 1 Wire Interface on handyboard
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Hi, has anyone implemeted Dallas Seminconductor 1Wire network on Handyboard? If not I'll take a a stab at writing the code, it doesn't look to bad according to the application notes. I've got several of the Dallas 1 wire thremometer chips.. pretty (...) (24 years ago, 14-Jan-01, to lugnet.robotics.handyboard)
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| | Re: 2 RealTimeJava for the 68HC11 Questions
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(...) Other than seeing people write about it, I'm not familliar with this product. When you say "newly constructed" is that to say it's in a kit form? Who makes it and where do you get it? I understand that it's a microcontroller development board, (...) (24 years ago, 14-Jan-01, to lugnet.robotics.handyboard)
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| | 2 RealTimeJava for the 68HC11 Questions
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Hello All, I am having lots of fun with my newly constructed Handy Board. I have also downloaded the simple RealTimeJava for the 68HC11 and been using that. It has worked well for me and I am inclined to continue using this as my tool of choice for (...) (24 years ago, 14-Jan-01, to lugnet.robotics.handyboard)
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| | Re: downloading the pcode during assembly
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(...) I have checked my serial charger board with hyper terminal. It is working perfectly. I have checked also the connections between the charger board and the HC11 and they are ok. (...) I have checked every wire connection between the HC11 and (...) (24 years ago, 13-Jan-01, to lugnet.robotics.handyboard)
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| | battery charging monitoring
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I have designed a simple lead acid charger for 12 V batteries and i am looking for a software program for 68hc11 microprocessor in order to monitor certain charging characteristics ( voltage, current, temperature). Thank you. (24 years ago, 12-Jan-01, to lugnet.robotics.handyboard)
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| | Sonar/Compass together on HandyBoard Expansion
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Has anyone tried interfacing a PNI Compass to a Handyboard expansion board w/sonar? Can anyone share the info? (24 years ago, 12-Jan-01, to lugnet.robotics.handyboard)
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| | Re: downloading the pcode during assembly
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The HB is supposed to be in special test mode, see (URL) . Re your downloading problems, first, see the debug info at (URL) the Windows serial debug test there, make sure that the serial signals are getting from the HB's RJ11 connector to the 68HC11 (...) (24 years ago, 12-Jan-01, to lugnet.robotics.handyboard)
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| | downloading the pcode during assembly
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hi, I am during the assembly phase where I am supposed to be able to download the pcode to the handy board. I've placed on my handyboard a UM62256A-10L as RAM a MC47HC132N and a PICVUE 16x2 LCD PVC160203P All the test from the handyboard assembly (...) (24 years ago, 12-Nov-00, to lugnet.robotics.handyboard)
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| | Re: Encoder Implemenation questions
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(...) I would suggest shutting it down early (say 5 ticks early) and using a "jog" mode whereby brief pulses are sent to the motor to move it the remaining distance. Lets say you shut it off at 19 (targeting 24) and the motor/load's momentum carries (...) (24 years ago, 12-Jan-01, to lugnet.robotics.handyboard)
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| | Re: Encoder Implemenation questions
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(...) Actually I was simplifying too much here. My goal is to be able to execute a relatively accurate 90 deg. turn to "round the curve" in a narrow hallway and to be able to spin on axis (robot is circular) a full 180 so I actually can count on (...) (24 years ago, 11-Jan-01, to lugnet.robotics.handyboard)
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| | Re: Encoder Implemenation questions
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(...) No, your conclusion is too broad, simply stated if you don't monitor motor current (and to some extent model the inertia of the motor) in software, then your damping algorithm (which is effectively a constant based on your description) won't (...) (24 years ago, 11-Jan-01, to lugnet.robotics.handyboard)
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| | Re: Encoder Implemenation questions
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(...) It certainly helps. I guess I'll stick to my kludge... it's easier. ;) So in order to do effective rotation sensors I need to monitor not only the rotations, but the power applied to the motor as well? That seems fairly complex but I guess (...) (24 years ago, 11-Jan-01, to lugnet.robotics.handyboard)
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| | Re: Encoder Implemenation questions
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You step into the morass that separates reality from theory :-) The "right" way to do this is to measure the current on the servos, ramp their accelleration up and then down again as you approach your final endpoint. Read up on feedback systems and (...) (24 years ago, 11-Jan-01, to lugnet.robotics.handyboard)
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