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1W Led lamp

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raja1

raja1

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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
 
raja1 said:
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
Click to expand...

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