Best (Cheapest) way to drive LEDs from 110VAC?

Mark_Larson · Oct 20, 2003

So i have a photo frame i'd like to mod with white LEDs. What would be the cheapest way to drive them from 110VAC? Transformer, mod of LED nightlight or something else?

... or should i just hook up a battery pack and not worry about doing it from power?

Streak · Oct 20, 2003

See LED night light below.

How many LED's and what colour do you want to use? Will it be on all of the time or switched on when required?

You may just find it easiest to use a 12 volt AC/DC adaptor with a few LED's with a resistor.

eluminator · Oct 20, 2003

Safety first. The nite lite is no doubt a nice circuit, but beginners should be careful working with ac power.

For what you want I think using a small wall wart would be better and safer.

INRETECH · Oct 20, 2003

Always use a transformer, for isolation and safety - there is no price on a human life

whiskypapa3 · Oct 20, 2003

WallWart that puppy.. Even if you build it so it will pass the "VDE Finger Test" someone, somehow is going to get across the mains and at the least do his READY-KILOWATT imitation.

Hopefully your relationship with the pictured one will last longer than bateries.

INRETECH · Oct 20, 2003

A lot of people each year underestimate the dangers of electricity and pay the ultimate price

Even if you have a way to reduce down the voltage, you still don't have isolation without a transformer

Find any old WallWart that you are not using, buy one for under a buck at any GoodWill/Etc and cut off the connector

Save ourself 4 diodes, find one marked DC

INRETECH · Oct 20, 2003

A lot of people each year underestimate the dangers of electricity and pay the ultimate price

Even if you have a way to reduce down the voltage, you still don't have isolation without a transformer

Find any old WallWart that you are not using, buy one for under a buck at any GoodWill/Etc and cut off the connector

Save yourself 4 diodes, find one marked DC

Best (Cheapest) way to drive LEDs from 110VAC?

Mark_Larson

Enlightened

Streak

Enlightened

eluminator

Flashlight Enthusiast

INRETECH

Flashlight Enthusiast

whiskypapa3

Enlightened

INRETECH

Flashlight Enthusiast

INRETECH

Flashlight Enthusiast

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