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Hi,
You could use this one to generate a random number:
One bit of the random number could be used to drive the pin low/hi and the random number for the duration of the low/hi-state.
Or just roll the the random number through the portpin.
hth
regards
joachim
Circuit Cellar had a Atmel program awhile back that simulated a candle flame with an LED flicker. It had a lot of mathematical theory of the candle flame flickering behind its formulas. Also had a self-heating thermistor to sense changes in airflow so it would respond to blowing on it or carrying it around. I never built it, but it sure sounded cool. Should be in Circuit Cellar's archives.
if i was u just putted a couple of arrays in whit different numers...
then just start doing crazy things whit them..increase one whit the other divde by the other array..asume 1 asume 2 arrays.. then increase whit 2 divde by the next array thing...
but offcourse a pair of formulas would be tough trou
in fact..the sensor is securing you in the above project that the candle never burns the same..
i think better should be using a clok..because it's time and date are always unique soow thats simpeler..
I want my lights (controlled by PIC) to flicker in the style of a broken neon light. Also like in star trek voyager when they flicker the lighting on damaged ships and corridors etc. I have a 665KB **broken link removed** to help get the idea across, it's only 14.57 seconds so i suggest playing it looped.
Replicating the dynamics of a failing neon light in a convincing way is going to be a bit more complicated than a simple RNG. It's a bit on the complicated side. If I recall correctly, when in the started mode it's relatively likely to stay that way from a few seconds to minutes, perhaps with periodic instabilities which don't turn it off. Same with being off, wanting to turn on. There's a dynamic to it struggling to flicker on too.
Depends on how much time you want to spend on tweaking it to being perfect, or just using a generic flicker.
Replicating the dynamics of a failing neon light in a convincing way is going to be a bit more complicated than a simple RNG. It's a bit on the complicated side. If I recall correctly, when in the started mode it's relatively likely to stay that way from a few seconds to minutes, perhaps with periodic instabilities which don't turn it off. Same with being off, wanting to turn on. There's a dynamic to it struggling to flicker on too.
Depends on how much time you want to spend on tweaking it to being perfect, or just using a generic flicker.
Hi,
just had a look at the video.
No problem.
Generate a random number. Now You've got 8 random bits. Shift them through the portpin to turn LEDs on and off. Having shifted 8 times generate a new random number, shift it.....and so on.
Other way: Use only one bit of the random number and generate a new one every time You update the portpin.
All You have to think about is the speed of shifting/updating. For the beginning try about 50-100ms between two shiftings/updates.
With the right time chosen it should look exactly as in the video.
hth
joachim
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