 | | Re: servo motors
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(...) What is it supposed to be doing? When you say _it_ doesn't work, what exactly is not working? I'm not that familiar with the routines but it looks like you're shutting off the servos before they can move. I also believe once you turn off the (...) (25 years ago, 2-Mar-00, to lugnet.robotics.handyboard)
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| | Converting voltage to resistance
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This is a dumb electrical question. I am a programmer, and I still struggle with the electrical aspects of this hobby. How do I convert voltage output to resistance. I have an application that turns out 0 to +5 volts. However, as I read the (...) (25 years ago, 2-Mar-00, to lugnet.robotics.handyboard)
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| | servo motors
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hi all i connected a servo to the digital 9 port, downloaded the servo.icb and servo.c files. from the command line i can control the servo. but then i wrote the following very simple code, and it doesnt work. can anyone spot the problem. void (...) (25 years ago, 2-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Exp. board Servo
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(...) Fortunately there is a direct relationship between servo-value and angle. Try different angles (for example 0 / 45 / 90 / 135 / 180 degree) and draw the diagram value vs. angle (for example with MS Excel). You will (hopefully) see a linear (...) (25 years ago, 1-Mar-00, to lugnet.robotics.handyboard)
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| | RE: HB's mA consume?
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Well, you can _greatly_ increase the efficency of the handyboard if you remove the 7805 regulator and replace it with a PowerTrends switching regulator (Digikey sells these among others). I would suggest you run three wires from the regulator to the (...) (25 years ago, 1-Mar-00, to lugnet.robotics.handyboard)
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| | RE: HB's mA consume?
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Thanks your answer Will, well, seems not easy to give a good use to a solar panel in the HB If I want to connect the a panel to the HB charging circuit, it must be 12V/500mA like the AC adaptor? or with less current (maybe 200 mA) , it can still use (...) (25 years ago, 1-Mar-00, to lugnet.robotics.handyboard)
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| | Re: HB's mA consume?
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If your calculations are correct, and your solar panel provides 40 mA, and you get maybe 6 hours of strong, useful sunlight per day, then I figure you'd need eight solar panels and three battery packs, minimum, to keep the HB running all the time, (...) (25 years ago, 29-Feb-00, to lugnet.robotics.handyboard)
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| | HB's mA consume?
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Hi, Today I have tested the time the HB can stay powered with his battery (just the board, without any other device attached), its work during aprox. 8 hs, so because the batteries I use are 600 mA, I believe that the consume of the board is around (...) (25 years ago, 29-Feb-00, to lugnet.robotics.handyboard)
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| | Re: HB memory capacity
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As IC loads each file, it reports how many bytes each one occupies. Just add 'em up. The IC interpreter is said to occupy approximately half of the 32 kB available, so if your code gets up to about 16 kB total, then you need to worry about trying to (...) (25 years ago, 29-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Exp. board Servo
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(...) Well, since it seems these values often vary from servo to servo I usually set them by using the knob function and scaling it down so I can visually see the numbers I'm putting into it and the result on the servo; turning it until it chatters (...) (25 years ago, 29-Feb-00, to lugnet.robotics.handyboard)
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| | Exp. board Servo
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Hi.. i have some questions about the exp. board and R/C servo, hope anyone can help me.. thanks.. From the "Expansion board software" homepage, it said that servo0=(value) is used to control the servo, may i ask how can i convert this value to (...) (25 years ago, 29-Feb-00, to lugnet.robotics.handyboard)
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| | HB memory capacity
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Hi all, A funny thing happened. i tried to download a file. IC gave the message it was downloading, but just when it finishes it gives me an error saying "lost synch with board". then i unloaded some files and redownloaded the file again. this time (...) (25 years ago, 29-Feb-00, to lugnet.robotics.handyboard)
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| | Re: KIPR Kit
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Joe, As it turned out, the edge of the pulley was right next to and perpendicular to a long beam piece. We just used hot glue to glue it to the beam and held it in place until the glue dried and had no trouble at all. The pulley can't come out of (...) (25 years ago, 29-Feb-00, to lugnet.robotics.handyboard)
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| | Re: KIPR Kit
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(...) These are what I also have been trying to use to break the beam, they seem to be the best choice. My question was more about how you mounted the sensor. I'm curious to know what piece people had glued the sensor to, and to see if they used (...) (25 years ago, 29-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Servo controllers
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(...) If you can burn PIC processors yourself, try my page at (URL) and bonk on the serial servo controller project. I have PIC12C508 code there that allows you to control 4 servos with a single 2400 baud connection. The code is set to allow a (...) (25 years ago, 28-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Servo controllers
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Yes, there is a way. Check out the serial servo controllers at (URL) one of these that you use controls up to 8 servos, and you can chain a bunch of them together and go servo nuts. -- Will Bain P.S. -- I haven't yet tried these myself. I'm curious (...) (25 years ago, 27-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Problem on loadind Expansion board files
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The problem is simply that the new expansion board code supercedes a couple of functions in the old lib_hb.c (and possibly in lib_hb.icb, too; I can't remember). If you go to the HB web site, you'll find a new version of lib_hb that's compatible (...) (25 years ago, 27-Feb-00, to lugnet.robotics.handyboard)
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| | RE: Solar charging and OWI Arm
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Whatever portion of the 40 mA that the HB requires for it's operation will "float over" the battery pack and be consumed by the board. The rest goes into the battery to recharge it. I haven't measured the current draw of my robot, but of course your (...) (25 years ago, 27-Feb-00, to lugnet.robotics.handyboard)
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| | Servo controllers
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I understand that a handyboard in combination with the expansion provides a total of 6 servo motor controllers. However, I need 12 controllers. Is there any other ways to achieve this other than buying another set of handyboard + expansion board? (...) (25 years ago, 27-Feb-00, to lugnet.robotics.handyboard)
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| | persistent globals
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Hi all Has anyone worked on persistent global variables. In the manual it says persiststents can keep their value on reset conditions and multiple downloads. i declared persistant globals in my program and they do keep their value on reset (...) (25 years ago, 27-Feb-00, to lugnet.robotics.handyboard)
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