 | | Re: Motors & handyboard
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(...) how did you take this measurement exactly? I think 75 mA might be kind of low, most motors will draw this much when they are just spinning but doing no useful work, but then draw much more when they are driving a geartrain. (...) actually, (...) (28 years ago, 14-Feb-97, to lugnet.robotics.handyboard)
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| | Motors & handyboard
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Yesterday I tried to run a motor out of the HB. First I tried how much current it needed with a multimeter and a 5V power source ... The result 75mA. When I tried to run the motor from the HB, after turning on the motor at low speed (motor (0,20);) (...) (28 years ago, 14-Feb-97, to lugnet.robotics.handyboard)
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| | Re: expansion board
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(...) I've got a PIC chip programmed with IR collision-detection built into it (I'm trying to get some of the new 8 pin PICs to see if I can make an "all in one" unit. Basically the interface is two bits: bit 0 output - Turn on IR illumination (...) (28 years ago, 14-Feb-97, to lugnet.robotics.handyboard)
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| | expansion board
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Fred, It seems to me that the first thing most people want to add to their robots that is not supported on the handyboard itself, is IR collission detection. How about including a modulator and driver for IR LED's, and a detector and demodulator (...) (28 years ago, 14-Feb-97, to lugnet.robotics.handyboard)
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| | Sockets for 18200
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Does anyone know if there exists a socket for the National 18200. My application warrants the need to be able to replace the chips if they should ever fail. thanks for any information Patrick (28 years ago, 14-Feb-97, to lugnet.robotics.handyboard)
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| | Re: Port E inputs
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the 6.270 has a diff anlg ckt. remember, the app b is generally applicable, but some details are different. -f In your message you said: (...) (28 years ago, 14-Feb-97, to lugnet.robotics.handyboard)
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| | dual servos
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Hello everyone, I have been fiddling with my dual servo routines and I have gotten things running to the point that I now need a chassis for my project. While working on the drive system I have noticed that when under heavy motor load (2 motors at (...) (28 years ago, 14-Feb-97, to lugnet.robotics.handyboard)
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| | Port E inputs
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Hello, I noticed that in Figure B.9 on page 194 in Appendix B of the 6.270 manual that pins PE0-PE3 are shown to go to seperate little port symbols while pins PE4-PE7 go to a block labeled 'Analog Input Header'. Do these inputs really go to two (...) (28 years ago, 13-Feb-97, to lugnet.robotics.handyboard)
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| | (Kein Bezug)
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help (28 years ago, 13-Feb-97, to lugnet.robotics.handyboard)
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| | LM324
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The latest expansion board schematic shows an LM324 for the high impedance input buffers. Although the LM324 is cheap and available, its input and output voltage ranges are limited to 0 to 3.5V (yes, probably a little more with any real part). If (...) (28 years ago, 13-Feb-97, to lugnet.robotics.handyboard)
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