LED for AC to DC

daguuy · Post by **daguuy** » Mon Jun 06, 2005 5:46 pm

i have a pocket TV that has 4.5 dc power jack and i have a 4.5v ac power adapter. i know diodes change ac to dc and LED = "light emiting diode." so my question is would LEDs change ac to dc?

HK-47 · Post by **HK-47** » Mon Jun 06, 2005 6:37 pm

Nope, a bridge rectifier changes ac to dc (though its made up of 4 diodes...). LEDs wouldnt work very well, if at all.

daguuy · Post by **daguuy** » Mon Jun 06, 2005 6:55 pm

i have plenty of LEDs. how would i make them into a bridge rectifier?

MM007 · Post by **MM007** » Mon Jun 06, 2005 7:01 pm

You need DC for use in LEDs, and most LEDs use lower voltages than the standard AC home voltages. You may see a bright flash from the LED and then see smoke.

nos_slived · Post by **nos_slived** » Mon Jun 06, 2005 7:03 pm

He said he has a 4.5V AC/AC adaptor.

MM007 · Post by **MM007** » Mon Jun 06, 2005 7:22 pm

You need normal diodes for a rectifier. LEDs aren't the same thing.

http://home.planet.nl/~heuve345/electro ... sson5.html

There is some diode and rectifier stuff.

daguuy · Post by **daguuy** » Mon Jun 06, 2005 7:26 pm

thanks

. once i find my soldering iron i'll have to see if i can make one with LEDs. they are diodes so hopefully it will work. if not i'll probably find some normal diodes in some old internet junk