A dimmer is a potentiometer/variable resistor, not just a switch.
And a diode is not a bulb.
( , Mon 25 Jan 2021, 20:14, Share, Reply)
And a diode is not a bulb.
( , Mon 25 Jan 2021, 20:14, Share, Reply)
Nah,
domestic mains lighting dimmers change the shape of the waveform to reduce the overall power in each AC cycle and can only be used with lamps that work with a non-sinusoidal AC supply (hence the need for dimmable LED lamps, and even then some are fussy about the waveform).
Resistive dimmers are too bulky, inefficient and get too hot to be practical in domestic lighting.
( , Mon 25 Jan 2021, 20:49, Share, Reply)
domestic mains lighting dimmers change the shape of the waveform to reduce the overall power in each AC cycle and can only be used with lamps that work with a non-sinusoidal AC supply (hence the need for dimmable LED lamps, and even then some are fussy about the waveform).
Resistive dimmers are too bulky, inefficient and get too hot to be practical in domestic lighting.
( , Mon 25 Jan 2021, 20:49, Share, Reply)
I once had a 'haunted' fluorescent bulb.
It started lighting intermittently (~1s) when switched off.
( , Mon 25 Jan 2021, 21:02, Share, Reply)
It started lighting intermittently (~1s) when switched off.
( , Mon 25 Jan 2021, 21:02, Share, Reply)
Fluorescent lamps are powered via a 'ballast' circuit to limit the current supply.
They may contain capacitors which could store sufficient charge to power the lamp for a short duration after the supply voltage has been removed.
( , Mon 25 Jan 2021, 22:31, Share, Reply)
They may contain capacitors which could store sufficient charge to power the lamp for a short duration after the supply voltage has been removed.
( , Mon 25 Jan 2021, 22:31, Share, Reply)
I'd thought of a capacitor, but it did it repeatedly.
My guess was some sort of current leakage allowing it to recharge. It died a few weeks after.
( , Mon 25 Jan 2021, 23:54, Share, Reply)
My guess was some sort of current leakage allowing it to recharge. It died a few weeks after.
( , Mon 25 Jan 2021, 23:54, Share, Reply)
Yeah, sounds like dodgy wiring
or your microwave oven was seriously leaking radiation!
( , Tue 26 Jan 2021, 0:40, Share, Reply)
or your microwave oven was seriously leaking radiation!
( , Tue 26 Jan 2021, 0:40, Share, Reply)
https://b3ta.com/links/1559267
But I hate them buzzy dimmers.
( , Mon 25 Jan 2021, 21:36, Share, Reply)
But I hate them buzzy dimmers.
( , Mon 25 Jan 2021, 21:36, Share, Reply)