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Posted by Rich Webb on April 6, 2010, 2:42 pm
On Tue, 06 Apr 2010 17:04:53 +0000, s0674366_at_monmouth_dot_edu@foo.com
(Justin v) wrote:
>Robotics Hardcore Newbie
>-------------------------------------
>hey guys and girls, I don't really know if this classifies as robotics,
>but this is the only forum i have seen that could possibly help me.
>all i need is a way to make a motor rotate a specified amount every 24
>hours while powering an LED....that's it. it would be nice if it could do
>it on its own say on battery's, but if it needs to be plugged into a
>computer I'm OK with that.
>So cliffs
>-i Need a motor
>-I need a Timer/Controller that will trigger the motor every 24 hours for
>less then a second.
>-batteries or computer powered both acceptable
>even if you have some info for me, or any other ideas to make this work,
>I'm open and willing to try all of it, although I'm on a time line, so the
>sooner the better
How accurate is the 24 hr interval required to be? To a few minutes or a
few nanoseconds?
Does the interval begin at an arbitrary time (e.g., at power-on), does
there need to be a start button, or is it required to synchronize to
some external event to begin the count?
Motors range from teensy cell phone vibrate motors up to, well, pretty
danged large. Do you need an active high (or low) trigger signal or a
full motor drive package for a ( )-sized motor of a ( ) type.
Is "rotate a specified amount" a measure of the motor shaft rotation
itself or of a load coupled through a reduction mechanism?
How precisely should the rotation be controlled? Is it open loop (turn
it on then off and hope) or does there need to be a closed loop control
system involved?
What is the cost of an under- or over-rotation event? The flower pot
gets not quite the right amount of water or the drawbridge ends up
misaligned and traffic backs up for hours.
What's up with the LED?
--
Rich Webb Norfolk, VA
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>-------------------------------------
>hey guys and girls, I don't really know if this classifies as robotics,
>but this is the only forum i have seen that could possibly help me.
>all i need is a way to make a motor rotate a specified amount every 24
>hours while powering an LED....that's it. it would be nice if it could do
>it on its own say on battery's, but if it needs to be plugged into a
>computer I'm OK with that.
>So cliffs
>-i Need a motor
>-I need a Timer/Controller that will trigger the motor every 24 hours for
>less then a second.
>-batteries or computer powered both acceptable
>even if you have some info for me, or any other ideas to make this work,
>I'm open and willing to try all of it, although I'm on a time line, so the
>sooner the better