I suspect the underdesigned input side caps. These are some 10-47uF sized high voltage electrolytic caps, and while the LED driver will try its best to maintain a constant current through the LED string with high frequency switching, some of the 100 or 120Hz (graetz-doubled line frequency) may still slip through.anorlunda said:The OP was asking about LED light bulbs indoors.
I'm aware of that , this is why its difficult to grasp the whole effect from a screen. when you see it with the naked eye it makes stuff look like a hologram but on a screen it just looks like frame rate effects here is a more recent video of mine ...Merlin3189 said:Nice. But I wonder how you know it is the Leds flickering rather than camera strobe?
(I don't actually know whether digital cameras have a strobe effect like the old movie cameras did.)
I've done many tests using LED strip lights running off different levels of AC voltage using a Auto-Transformer and controlling how much AC volts go into the strip. It was kinda surprising how much AC voltage they could handle before burning out at around 60-70 volts AC. Even though they could run on 30-40 volts AC but at this voltage the heat build up that gets put out by the strip increases dramatically to the point where the PCP pipe I had wrapped the LEDs around began getting soft and to in a sense melt the PCP pipe from the excess heat. The LED lights though to my surprise could handle the heat very well and only burnt out when AC voltage was apply at too high a level and cause the diode to pop and come on only very dimmly after but still not completely burnt out. This tolerance is only done with LED strip lights that have semi-conductor chips in them providing resistance for the DC current. These resistors is what allow for the AC voltage to power the strip without burning out the LED completely. if AC voltage is apply to LEDs that don't have resistors in its circuit will burn then out at 3-5 volts. I know from tests I've done. But strip lights with resistor chips in them can run on lower voltages of AC and when doing so give off a very holographic ghost like blinking effect behind any object that moves like a ghost blinking tail following behind the object moving on what ever these LED lights shine on. This effect is really cool to see with the naked eye and I think could have potential for stage performers or break dancing anything like that. I have yet to test different frequencies with the LED strip lights to see if I can shorten or extend the tail of blinking flashes that follows behind the objects moving when using these LED strip lights but have not gotten to that point yet. Finding time to work on this stuff can be difficult sometimes...dlgoff said:Here's a "Why LED's flicker" I found by Google searching:
https://www.nbpower.com/blog/en/posts/2018/june/why-led-s-flicker-and-how-to-stop-it/