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By popular request, a different version of the tungsten to LED fairy light conversion project, that uses a common capacitive dropper module from ebay to run the LEDs at higher current.
With this module as it is supplied you can drive up to around 40 LEDs in series with no PCB modifications on 120V. If your supply is 220V to 250V I’d recommend changing the electrolytic capacitor for a 400V 4.7uF one (a common type in the lighting industry) and adjusting the value of the red current limiting capacitor from the supplied 680nF to something like 100, 220, 330 or 470nF (at 400V) depending on how bright you want the LEDs and how many you want to run. The upside for higher voltage 220-250V supplies is that we can run around 100 LEDs in series.
Although the capacitive dropper is more complicated than the simple resistive dropper, it is much more efficient since it doesn’t dissipate the excess power as heat
Here’s a link to an ebay seller of these capacitive dropper supplies.
