 | | Re: pulse trains
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(...) I'm doing signal conditioning for pan/tilt and (ultimately) drive/steer signals from an RC receiver and driving servos with the processed signals. All power for the servos is external, so all I need is signals through the Handyboard. -mike * (...) (29 years ago, 25-Mar-96, to lugnet.robotics.handyboard)
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| | Re: unsubscribe
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In order to be removed from the Handy Board mailing list, please send e-mail directly to me, Fred Martin. There is no need to announce your request to the entire list. Enclosed are instructions from the mailing list page on the web site. -Fred -- (...) (29 years ago, 25-Mar-96, to lugnet.robotics.handyboard)
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| | digital output
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Is it possible to use any digital output on the Handy Board without loosing the monitor (or anything else for that matter)? Scott sherman@plains.nodak.edu (29 years ago, 25-Mar-96, to lugnet.robotics.handyboard)
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| | unsubscribe
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unsubscribe (29 years ago, 25-Mar-96, to lugnet.robotics.handyboard)
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| | (no subject)
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UNSUBSCRIBE (29 years ago, 25-Mar-96, to lugnet.robotics.handyboard)
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| | Re: Driving large motors with the Handyboard
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(...) Thanks for the tip. I got a hold of the book and read some of it. :) I was wondering if sending pulses to the motor would cause "choppy" rotation....or does it occur so fast that inertia effects make it "smooth". Also, with an h-bridge, is it (...) (29 years ago, 25-Mar-96, to lugnet.robotics.handyboard)
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| | pulse trains
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Mike, Out of curiosity, what are you using the pulse trains for? (If you're running multiple servos, I think I know a single-chip hardware mod to drive up to 8 servos from a single timer output.) -- Randy (29 years ago, 24-Mar-96, to lugnet.robotics.handyboard)
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| | TOC 2 & 3
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AAAARRRGGGHHHHHH!! After the pain of relearning assembler and getting interrupt routines to work, it seems my assumption of the availability of TOC 2 & 3 is incorrect. I need 2 (wanted 4) pulse trains to go out. According to the diagrams Fred (...) (29 years ago, 24-Mar-96, to lugnet.robotics.handyboard)
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| | Re: OC2 and OC3 outputs?
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Take a look at the schematics, which are linked from the top page of the Handy Board web site. The info you are looking for is in the CPU / memory schematic. For the DC Motor outputs, the board uses a separate output latch---not the timer outputs. (...) (29 years ago, 24-Mar-96, to lugnet.robotics.handyboard)
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| | DC Motor Position control
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I am wondering if anyone tried to write an IC program for DC motor position control using PID/P or whatever with a handyboard. I am also looking for a good precision DC motor (with encoder and gearbox integrated), I very appreciate your help for any (...) (29 years ago, 24-Mar-96, to lugnet.robotics.handyboard)
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| | Re: Resets
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The MB design keeps ground in common, but the ground to the cpu, has an inductor in line with it, the HB also has a inductor on the ground side, I think. You might want to put an inductor on both sides of the motor, with a cap inbetween both of (...) (29 years ago, 24-Mar-96, to lugnet.robotics.handyboard)
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| | Re: Resets
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If I add a separate motor power to the L293's, can I keep the ground lines common? If not, what pins are motor ground? (I know pins 4,5,12, and 13 are ground) Thanks. -John (...) (29 years ago, 23-Mar-96, to lugnet.robotics.handyboard)
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| | IC for Windows
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(...) We use Microsoft Visual C++ (v. 4.0). -- Randy (29 years ago, 23-Mar-96, to lugnet.robotics.handyboard)
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| | IC for Windows.
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Just outta curiousity, what was IC Win developed with? (29 years ago, 23-Mar-96, to lugnet.robotics.handyboard)
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| | Re: Driving large motors with the Handyboard
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There are several ways to do this. In Mobile Robots, they talk about H bridge circuits. If you are doing less than 2A use a L298 and some some clamping diodes ( these keep the driver chip from being fried when you turn the motor off). The L298 has 2 (...) (29 years ago, 23-Mar-96, to lugnet.robotics.handyboard)
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| | Driving large motors with the Handyboard
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Hi. I'm kinda new at this. I was wondering if anyone can help me answer this question. If I wish to drive large motors with a Handyboard, I understand that I have to use an h-bridge. Will I need to know anything about PWM before attempting this (...) (29 years ago, 23-Mar-96, to lugnet.robotics.handyboard)
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| | Re: Resets
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I have a few suggestions, these are all things that I have seen before to help reduce noise from motors I think that the problem might be due to crap getting back to the power line... thereby causing the DS1233 to say, time to reset... - try a (...) (29 years ago, 23-Mar-96, to lugnet.robotics.handyboard)
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| | OC2 and OC3 outputs?
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Where on the v1.2 board do I tie into the OC2, OC3, and OC4 output lines? Is there a schematic which has all the I/O pins labeled? I need to use the OC lines to output pulse trains. Does the library software use these ports for the motor() commands? (...) (29 years ago, 23-Mar-96, to lugnet.robotics.handyboard)
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| | Re: Resets
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(...) I can't say that I have an explanation of why the motors would work at first and then cause problems later, but I can say that: Not all motors work with the Handy Board. In particular, motors that want to draw too much current (e.g., more than (...) (29 years ago, 22-Mar-96, to lugnet.robotics.handyboard)
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| | Analog semsor inputs.
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What is the range of detection of the analog sensors? Are there discreet detection levels that the hendyboard can recognize? (29 years ago, 22-Mar-96, to lugnet.robotics.handyboard)
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