 | | RE: Drive R/C Servos with the RCX and pbForth (long)
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(...) Oops, forgot to answer the main question. Yes, I have thought about making boards...and as soon as I get out from under my current workload I'm going to give it even more thought.... It is just not worth my time and money to make any less than (...) (26 years ago, 12-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | RE: Drive R/C Servos with the RCX and pbForth (long)
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(...) I hear you, John. Learning a new language can be a bit tricky, and I won't go into the details of why I think it's a good idea to learn different languages to get the benefit of different ways of thinking about problems...oops, don't get me (...) (26 years ago, 12-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | Re: Drive R/C Servos with the RCX and pbForth (long)
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Ralph - I'm interested in the use of servos with the RCX, but I have no interest in learning the quirks of another computer language. I'm already a bit familiar with Visual Basic,and control the RCX with it. Can your pbForth solution be duplicated (...) (26 years ago, 12-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | RE: Drive R/C Servos with the RCX and pbForth (long)
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(...) I should add here that no external power source is necessary to drive the servo. This is important since a micro or miniservo and an SMT version of the driver can be made to fit INSIDE a space similar to a worm gear box (6588 in LDraw). I'm (...) (26 years ago, 12-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | RE: Drive R/C Servos with the RCX and pbForth (long)
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(...) No, the servo needs power to the + and ground terminals to drive the motor to the setpoint indicated by the signal wire. If I don't invert the signal there is no power for about 30msec and only 1 or 2 msec ov voltage on the motor port. By (...) (26 years ago, 12-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | Re: Drive R/C Servos with the RCX and pbForth (long)
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(...) If you're using a custom motor driver in pbForth, why use the inverter circuit at all? Why not just generate the desired waveform directly? Is there not enough current to drive the servo that way? --Ben (26 years ago, 12-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | Drive R/C Servos with the RCX and pbForth (long)
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Hi again everyone! A few days ago I announced that I had developed a nice little circuit using easily available parts that would let you connect servos to the RCX - with no external batteries or microprocessors or anything! At that time, I said that (...) (26 years ago, 12-Feb-00, to lugnet.robotics, lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | Re: How much memory finally?
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Here's the latest update. Hope we will get a clear picture of this #@$@ memory after all. The point is that the RCX processor can address 64k of memory, so let's divide this range into 4 equal area of 16k. (note:16k or 16384, in hex is 0x4000). (...) (26 years ago, 10-Feb-00, to lugnet.robotics.rcx)
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| | Re: How much memory finally? ADDENDUM
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I have seen some systems that have RAM set up this way: The first area is for the system, the second area is user programs and is allocated from the bottom up. The third area is user (and system) data, allocated from the top down. They "meet in the (...) (26 years ago, 10-Feb-00, to lugnet.robotics.rcx)
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| | Re: How much memory finally? ADDENDUM
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Hey, that's a pretty nice idea! Any volunteer? D. (...) (26 years ago, 10-Feb-00, to lugnet.robotics.rcx)
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