3 ms·

Fewer components is good, but too few (and certain switch wiring) and your led bulb can't be turned off due to the capacitance of the house wiring https://yout

• zaarn 7y ago
  There are necessary components in devices. I doubt you'd argue "fewer compoments is good" when someone omits the seat belts from a car. LED lights need some components to work properly. One is a AC/DC power supply that converts the AC power to properly smoothed DC. This is the largest and most complicated part of the device. The second is a current regulator that regulates the amount of current going through the LED. Third is a capacitor that smoothes out the flickering of the grid and power supply. In some cases you can merge the DC power supply with the current regulator. If you have a current regulator, your capacitor can be a lot smaller since you already compensate for flickering below the bandwidth limit of that regulator. The largest part is the DC converter, the cheaper bulbs and filament ones basically abuse the LEDs as a DC converter via their diode properties. You can still add a current regulator but it's harder to do and reducing flickering becomes very hard without introducing a lot of capacitance at the AC side. Having a proper DC converter also avoids lighting the bulb on capacitance since you can define drop off voltages and burn some wattage in there that will eat any capacitive voltage.