 | | To Add my 2.5 cents
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I think the expansion board is A-OK as it is. (I'm being rather selfish since the Hartford Firefighting contest is in April). -Jim (28 years ago, 8-Feb-97, to lugnet.robotics.handyboard)
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| | large # of digital I/O's
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Check out the 82C55. In a 40 pin package, it has 24 bits of digital bidirectional I/O, and can be bit- or byte- addressed. It's cheap (like $4 or so in quantity). The 40-pin DIP package is big, but not compared to 3 20-pin DIP packages which it can (...) (28 years ago, 8-Feb-97, to lugnet.robotics.handyboard)
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| | FW: I agree-
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Servos outputs are good, but generic handyboard serial output to Scott Edward's Serial Servo Controller would be faster to implement and design, much and simpler to work with, and would be extensible to other serial projects too. (...) (28 years ago, 8-Feb-97, to lugnet.robotics.handyboard)
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| | FW: expansion board schematic posted
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I'd agree with this option - I don't need any more inputs, but I do need 4 logical outputs 2-4 Hi-current outputs Serial communications 1 (preferably 2) sonar connectors I could really use that second sonar. I don't suppose there is a way you could (...) (28 years ago, 8-Feb-97, to lugnet.robotics.handyboard)
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| | Re: expansion board schematic posted
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While I've only been working with the Handy Board for a week or so, I would also like to see several more outputs added. Perhaps some combination such as 8 digital (CMOS) outputs, and 8 of the dual-transistor types. If you could rig it up with (...) (28 years ago, 8-Feb-97, to lugnet.robotics.handyboard)
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