 | | large # of digital I/O's
|
|
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)
|
| |
| | FW: I agree-
|
|
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)
|
| |
| | FW: expansion board schematic posted
|
|
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)
|
| |
| | Re: expansion board schematic posted
|
|
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)
|
| |
| | Dum spiro spaero (While I breath, I hope)
|
|
(...) Thanks, Randy, my good man! Sorry if took a bit of playing with good old "honoris studioso". But you can't blame a guy for trying. Especially if it yields results. :) Alex. (28 years ago, 8-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | IC development
|
|
(...) OK, Uncle! I apologize that, at times in the past year, IC development has taken a back seat to our 32-bit C environment and vision system development. We realize that we have made a commitment to the community to come out with IC 3.1, and we (...) (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | Re: Expansion board
|
|
Hi Everyone, We (Digital Micro Systems) have an expansion board which we've been beta-testing for a while, but have not released yet. This seems like an appropriate time to ask for any feedback regarding the design before release. Anyway, the (...) (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | Re: IC
|
|
(...) from commitments. How MITesque! That is why we had to drop HB development for our equipment and look for another platform. If you are in the same situation take a look at (URL) You might like it. Alexander A. Chaihorsky V.P. Engineering, (...) (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | (no subject)
|
|
(...) from commitments. How MITesque! That is why we had to drop HB development for our equipment and look for another platform. If you are in the same situation take a look at (URL) You might like it. Alexander A. Chaihorsky V.P. Engineering, (...) (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | Re: I agree-
|
|
--vote:: More outputs. Sincerely, Yoni Garbourg << To succeed, Atificial Intelligence needs 1.7 Einsteins, two Maxwells, five Faradays, and .3 Manhattan Projects." >> -John McCarthy (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | digital outputs
|
|
Just to be clear, I wanted to ask if I am right to think that the HB, with no expansions, is configurable for ONLY 5 digital outputs? I'm aware of the #9 pin on the output bus. It works fine. But, if someone could explain in more detail the J6 (...) (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | I agree-
|
|
More servo outputs would be great. I too would like to control a lynxmotion arm with the handyboard. Or perhaps a legged robot with servos or servo controlled hydraulics. I vote for more outputs. Thanks. -ira C User Support Manager Earlham Computing (...) (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | Re: expansion board schematic posted
|
|
It is largely a space issue, not only for chips but connectors. It definitely would be feasible to remove one of the analog muxes and substitute an output latch in its place. Then the specs would be 8 general purpose, 4 hi impedance, 4 LEGO analog (...) (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | shaft encoder routines
|
|
now available for connecting break-beam or reflective encoders to analog inputs 0 through 6. See the main page (URL) (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | RE: expansion board schematic posted
|
|
I've got one comment "balance". The expansion board adds 24 new inputs and only 6 new outputs. Perhaps I'm atypical but I don't need any more inputs to the handy board, I've got those aplenty, but I'm screaming for outputs to control other parts of (...) (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | Re: FW: expansion board schematic posted
|
|
(...) Hmmm... why not do this? Use a 74273 and tie it to the HB's data lines and strobe it with Y0 (or Y2 or Y4)? This would create a latched output "port" at address 0x4000. Tie two of the 74273 outputs to the 'A' side of two [N]AND gates (...) (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | help
|
|
help (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | Communication Problems!!!
|
|
i'm having problems with my handyboard communicating with my mac. i cannot seem to get either one to recognize each other in any way. when i jumper the max32 to the 25 pin connector as said in the assembly, the green LED goes on. however, i cannot (...) (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | Mobot report
|
|
-- MIME ATTACHMENTS DISCARDED: 1. Content-Type: text/plain; charset="us-ascii" Content-Disposition: attachment; filename="1.TXT" Content-Length: 33505 2. Content-Type: text/plain; charset="us-ascii" Content-Length: 1 (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | Re: expansion board schematic posted
|
|
(...) Since there's some prototyping area, why not just make them regular CMOS signals and include application notes on the web page on how to use the signals for various options. How does the expansion board mount? Looks like it plugs into the top (...) (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
|
