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1W Led lamp

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raja1

New Member
dear all

i want to light up 1W white from 230v. if anyone have simple circuit for this project please send it to me

thanks
 

ericgibbs

Well-Known Member
Most Helpful Member
dear all

i want to light up 1W white from 230v. if anyone have simple circuit for this project please send it to me

thanks
hi,
What is the forward voltage drop of the White 1 Watt led, also I assume thats a 230V 'ac' mains supply.?
 

Mr RB

Well-Known Member
The 1W led I have here is about 3.3 volts and 300mA or so when at full power.

It's not that easy to build a SMPS to drive a 1W led, the cost is the killer since you can get so many cheap Chinese made commercial drivers.
 

Hero999

Banned
A 5V wall wart plus a suitable value resistor would do the job.

If you're worried about efficiency then use a switching wall wart and an open-loop switcher based around a 555 timer.
 
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