Introduction: LED Light From Useless Mobile Charger

a Led Light assembly done  inside a useless mobile charger case. 
Steps-- first disassemble the  charger and take out the inner circuit, use hex screw to open the chargers of samsung. nokia, lg mobiles.
Second- made 4 pairs of holes , total 8 holes for the legs of 4 Leds. put them and solder as per diagram.
Third- connect the capacitor 0.22uf/400 volt & 1 Meg Ohms Resistor in parallel, here the resistor is used as a shunt resistor to discharge the stored current from the capacitor after the AC switch off. its a safety measure to avoid high voltage shock.
Fourth- connect 1 K ohms resistor as shown in diagram.
Fifth- assemble with screwing the case.
Sixth- connect with ac source 220 volts & Voila!!!!!, there is Light !!!!!!!!!!!!

Comments

author
bleezz (author)2014-04-21

How will it differ if I increase the count of LEDs? Like if I want 20 white LEDs on same 220~240 volts...

And is there a way by which I can check the power of LEDs? As I have some 50 old LEDs (mixed red/green/blue/white), whose power I'm not sure... Please guide me as I'm new...

author
appliedgravity (author)2014-02-15

How would it change if its 120v (USA)?

author
asarode (author)2014-01-08

I want to know that which end should be connected to live and which end to the neutral?
And when the LEDs light up then does they show any ripples?

author
drsantanu (author)asarode2014-01-09

1 meg resistor side connected to live and 1 k resistor connected to neutral.
They show ripples, but its hard to recognize that in naked eye. use bright blue or green or red or white led according to ur need.thanks.

author
asarode (author)drsantanu2014-01-12

So we have to take care while inserting it into the mains socket? i.e. I have to mark the charger body that the particular end should be in the respective holes of the mains socket, isn't it?

author
drsantanu (author)2013-12-13

@tutdude98 i used only not working chargers, so i have to discard the circuit board as that was non repairable.

author
tutdude98 (author)2013-08-18

most phone chargers use ~ 5v 500ma so you can just put 10 leds in series and it would be safer than 220v

author
tutdude98 (author)2013-08-18

most phone chargers use ~ 5v 500ma so you can just put 10 leds in series and it would be safer than 220v

author
AndyGadget (author)2013-08-18

 
Once would have been enough #;¬)

author
AndyGadget (author)2013-08-18

 
This is one of those projects which should have a notice such as :-
"WARNING - THIS INVOLVES DIRECT CONNECTION TO MAINS VOLTAGES AND COULD HAVE FATAL CONSEQUENCES IF NOT CONSTRUCTED / HANDLED WITH EXTREME CARE"

author
drsantanu (author)AndyGadget2013-08-18

Thanks andygadget

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