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Message #5955 of 59772 |

I'm moving to my next project, which officialy, will be the first robot
I build with reversing and turning capabilities built into the main
circuitry during the initial design.

I may need to cross a few signal lines or reverse a couple polaritys,
but I think the circuit is about right. If anyone wants to get a look at
it, go ahead. It uses the 3 motor hexapod mechanics similar to the
cricket or Lynxmotion's Hexapod I.
--

Richard Piotter The Richfiles Robotics & TI web page
richfiles@... http://richfiles.calc.org

-- Make Money by Simply Surfing the Net!!! Click below!!!
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Mon Sep 25, 2000 11:55 pm

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Richard Piotter <richfiles@...>

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Message #5955 of 59772 |

Expand Messages	Author	Sort by Date
I'm moving to my next project, which officialy, will be the first robot I build with reversing and turning capabilities built into the main circuitry during...	Richard Piotter richfiles@...	Sep 25, 2000 11:55 pm
Very nice Richard! ONe thing however: would it be easier to tune if the bicore controlled the two leg motors directly, and the waist motor had that half a time...	Ben Hitchcock beh01@...	Sep 26, 2000 12:40 am
the bicore portion is always 180 degrees out of phase, and safe for the H-bridges. the branch portions can exist for short times in the same state depending on...	Richard Piotter richfiles@...	Sep 26, 2000 1:05 am
Oh sorry, missed the second paragraph. I'm not so worried about it, being that I'll need to fill the chip anyway, requiring a second, and I already have a...	Richard Piotter richfiles@...	Sep 26, 2000 1:14 am
... Nope, it isn't. Select = H, all outputs forced to H. Select = L, one output is active low, depending on inputs. So, it looks as though you're going to fry...	Bruce Robinson Bruce_Robinson@...	Sep 26, 2000 4:53 am
I've followed the advice below, and I think I have a reasonable circuit to work with. Feel free to look at the schematic to see if it looks right now. I'd like...	Richard Piotter richfiles@...	Sep 26, 2000 7:37 pm
I tend to follow the low high stuff in my head. My mapping skills also seem to work to mentaly image schematic and PCB layouts, and convert between the two....	Richard Piotter richfiles@...	Sep 27, 2000 2:50 am
... Lessee. Switching time for a 74HC14 powered with 4.5 volts is 15 nanoseconds MAX. I'd say you don't need to worry about it, Richard :) Actually, this is...	Bruce Robinson Bruce_Robinson@...	Sep 27, 2000 6:06 am
The "gate delays" are not a problem since short h-bridge glitches have low energy. Anyway the turnon / turnoff times of the h-bridge are also different so only...	Wilf Rigter Wilf.Rigter@...	Sep 28, 2000 6:17 am
Here is the detail on the biphase slave. <<biphase.gif>>...	Wilf Rigter Wilf.Rigter@...	Sep 28, 2000 2:19 pm

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