240V Polish Christmas lights with series resistors.
bigclivedotcom 13:34
41,723 views · 1,539 likes Watch on YouTube ↗
Although these could be lights from any part of the world that has a 220 - 240V supply, I specifically describe these as Polish because they are part of a box of stuff sent from Poland by Michal for our technical amusement.
The construction is interesting because they are using a simple resistive dropper with a small number of resistors. To run so many LEDs in series (100 as 25 each of red, green, yellow and blue) is quite complex as they will only light when the sinewave exceeds the combined forward voltage. I'm guessing they probably experimented with resistor values to get the correct current at the highest expected voltage.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.
The construction is interesting because they are using a simple resistive dropper with a small number of resistors. To run so many LEDs in series (100 as 25 each of red, green, yellow and blue) is quite complex as they will only light when the sinewave exceeds the combined forward voltage. I'm guessing they probably experimented with resistor values to get the correct current at the highest expected voltage.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.
Category (YouTube): Science & Technology
Playback is via YouTube's official embedded player. Data from YouTube; Exumo is not affiliated with YouTube.