hi, I'm working on a time fountain and could use some help.
A time fountain is basically an optical illusion that makes water drops seem to freeze in mid air.
i could start explain the hole thing but i rather explain what relevant for the question. if your interested theres an explanation in this link.
http://cre.ations.net/creation/the-time-fountain
ok so heres the deal.
we have leds aimed at water drops, assume that if leds are off water drops are invisible. meaning when i turn them on permanently you will see them, if i dont you simply wont.
drop is falling from 0.18m and is detected with accuracy of several uS (microsecond 1/1000000).
I'm working with a microprocessors and programming it I'm assembler - meaning we are talking about accuracy of microseconds.
The effect happens IF -> after each drop is detected we wait X time, then turn leds on for Y time then turning them off.
what happens here is, after the drop is detected i wait some time, until drop falls away from the top a certain distance, then i light the leds on, capturing the location of the drop, when I'm lighting the leds it should be just long enough to see the drop in its current location only!.
if drop rate is fast enough to get close to our eye ability to capture 30 frames per second (try to get as close as possible to: drop every 33 milliseconds),
we will capture a different drop in the same location every time and it will seem as drop is frozen in mid air.
i hope I'm been clear here, I'll start with just this question and see if I'm understood since thing get more and more complcated.
my question is how to calculate X and Y to be optimal for our eyes to see.
it seems to me X can be calculated through X=0.5gt^2.
so this is just to get the topic started ask me anything u don't understand and when wer clear il get more into it.
A time fountain is basically an optical illusion that makes water drops seem to freeze in mid air.
i could start explain the hole thing but i rather explain what relevant for the question. if your interested theres an explanation in this link.
http://cre.ations.net/creation/the-time-fountain
ok so heres the deal.
we have leds aimed at water drops, assume that if leds are off water drops are invisible. meaning when i turn them on permanently you will see them, if i dont you simply wont.
drop is falling from 0.18m and is detected with accuracy of several uS (microsecond 1/1000000).
I'm working with a microprocessors and programming it I'm assembler - meaning we are talking about accuracy of microseconds.
The effect happens IF -> after each drop is detected we wait X time, then turn leds on for Y time then turning them off.
what happens here is, after the drop is detected i wait some time, until drop falls away from the top a certain distance, then i light the leds on, capturing the location of the drop, when I'm lighting the leds it should be just long enough to see the drop in its current location only!.
if drop rate is fast enough to get close to our eye ability to capture 30 frames per second (try to get as close as possible to: drop every 33 milliseconds),
we will capture a different drop in the same location every time and it will seem as drop is frozen in mid air.
i hope I'm been clear here, I'll start with just this question and see if I'm understood since thing get more and more complcated.
my question is how to calculate X and Y to be optimal for our eyes to see.
it seems to me X can be calculated through X=0.5gt^2.
so this is just to get the topic started ask me anything u don't understand and when wer clear il get more into it.