Did someone tried to put LEDs in series and connect them directly to a wall plug?
Just a rectifier is needed (rated for 400V), a 8000 Ohm resistor (5W), and 50 white LEDs in series. Under 230V AC they would lead 20mA max.
Divide those numbers by ~2 under 110V AC.
A more efficient way would be to make a small set:
3 white LEDs in series, a 330 resistor and a capacitor (in parallel)
then put ~20 of these sets in series and plug to the 230V (or ~10 in 110V AC, don't forget the rectifier).
What do you think?
Just a rectifier is needed (rated for 400V), a 8000 Ohm resistor (5W), and 50 white LEDs in series. Under 230V AC they would lead 20mA max.
Divide those numbers by ~2 under 110V AC.
A more efficient way would be to make a small set:
3 white LEDs in series, a 330 resistor and a capacitor (in parallel)
then put ~20 of these sets in series and plug to the 230V (or ~10 in 110V AC, don't forget the rectifier).
What do you think?