Hi I'm new here
I film things with high speed cameras and am having problems with flickering lights
typical cameras operate at over 1000 pictures a second with each image being 1/2000th of a second or shorter
a standard lightbulb on a 50 hz AC mains supply flickers 50 times a second and that is quite clearly visible
if you film the filament you can see it heat up and glow then cool down
because of this we mainly use either high frequency lights that operate at 1000hz, large tungsten halogen lights 5kw and above where the filament is much heavier and dose not have time to cool down before the next cycle heats it up again
or run lights from DC either battery or DC psu
I would like to use 12/24v LED lights on PWM dimmers that are powered from switch mode PSUs
but need to find high frequency PWM dimmers
What I would like is advise on how to measure the PWM frequency of these dimmers and also the PSU
I think I need an oscilloscope ?
if so which one would be suitable for a beginner
and would also need advise on how to use it !
I have very basic electronics knowledge and I am a qualified electrician
regards
robin
I film things with high speed cameras and am having problems with flickering lights
typical cameras operate at over 1000 pictures a second with each image being 1/2000th of a second or shorter
a standard lightbulb on a 50 hz AC mains supply flickers 50 times a second and that is quite clearly visible
if you film the filament you can see it heat up and glow then cool down
because of this we mainly use either high frequency lights that operate at 1000hz, large tungsten halogen lights 5kw and above where the filament is much heavier and dose not have time to cool down before the next cycle heats it up again
or run lights from DC either battery or DC psu
I would like to use 12/24v LED lights on PWM dimmers that are powered from switch mode PSUs
but need to find high frequency PWM dimmers
What I would like is advise on how to measure the PWM frequency of these dimmers and also the PSU
I think I need an oscilloscope ?
if so which one would be suitable for a beginner
and would also need advise on how to use it !
I have very basic electronics knowledge and I am a qualified electrician
regards
robin