How many LEDs i can connect to 240v AC supply using resistance? Answered
I just want to figure out how many 5mm super bright blue LEDs of VF 3V , IF 25mA i can connect directly to our 240v AC supply in series, only using a resistance in between.
I google some circuits what i got :-
1) Android App named "ElectroDroid" can calculate Resistance for my 240v ac for 76 or 77 or 78 or 79 LEDs in series as 480 or 360 or 240 or 120 ohms respectively. I attached the screenshot with this question..
2) A link http://led.linear1.org/led.wiz can calculate also but highest amount of supply voltage can be used 170V and number of LEDs i can use is 56 in series with 82 ohm resistance in it.
so i think option 1 can be more useful because i dont want to use extra thing ( transformer i think ) in my LED string to step down voltage in series.
OR if anyone can simply tell me how many of LEDs 5mm blue VF 3 IF 25mA i can use in a series directly to 240V AC supply with less complicated circuit