 | | Re: Expansion interface status
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(...) Build a 68360 in the expander board, that'll get ethernet, and multiple SCI ports. All the IO anyone should ever need. :-). (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | RE: Expansion interface status
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While I welcome the small kits, they introduce interface issues for beginners, especially if there are multiple kits attached simultaneously - seems like this is a problem the expansion board should be solving rather than causing. The value I am (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | FW: 6 servos
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RS232 is +12 and -12, but most serial ports can work correctly even if the signal is 3 to 5v. I regularly use 3 to 5v level serial signals. If you need to convert low voltage serial to RS232 specs, you can use a chip like Maxim's 232 - see (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: 6 servos
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(...) There are two types of serial voltages: TTL level and RS-232 level. The HB's serial interface board converts from TTL to RS-232 for communicating with the host computer. The Scott Edwards board accepts TTL levels, so an HB pin can drive it (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: 6 servos
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(...) Are the digital outputs at 5v high? I think you mentioned on the HB homepage about the serial interface converting RS232 levels at +12 and -12v to TTL levels (5v). I'm not that familiar with the nitty gritty of RS232 so this kinda puzzles me. (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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