4 ms·
A lot of cheap mains-powered LEDs aren't using PWM, but running on mains power directly. You can test whether this is the case using a smartphone camera and an
by Zak 9y ago
A lot of cheap mains-powered LEDs aren't using PWM, but running on mains power directly.
You can test whether this is the case using a smartphone camera and an app with manual shutter speed control. If you see scanlines just above and below, but not at 1/50s, your light source is flickering at 50 Hz, which is the AC frequency of UK mains power.
- pflanze 9y ago> A lot of cheap mains-powered LEDs aren't using PWM, but running on mains power directly. Yes, I just added information about that to my comment, sorry for the race condition.