Hi i am building a sculpture at uni and i need to power some LEDs. Once the sculpture is finished i wont be able to access inside to change batteries. Im looking to power around 4 to 8 5v LEDs from a 240v plug and wanted to know what is the best (and safest) way to go about this. Though i'd ask before i got myself electrocuted.
Are these just small LEDs or big multi watt LEDs? If they are small, I would suggest using a wallwart transformer to power them. Post a little more about the exact LEDs you want and how you want them hooked up and we can assist better.
Are you sure this is the same guy? I know 2 sculpture lighting topics in the span of 2 days is a bit unlikely, but odder things have happened around here....
Hi
Rev voltage of a red LED is +_ 2.8V the current is ok, (25mA)
It is possible to run it directly from 230V 50Hz or 110 V 60 Hz .How ever it is very dangerous.
Here is a real world circuit and device I built around six years ago. ITs been plugged in and working ever sinse!
You will still have figure out your capacitor values based on the actual line voltage, frequency and number of LEDs and related voltage drop and running current you are actualy going to use.
almost two days before someone noticed and commented?
I am giving that a D- for effort!
Yea I saw that shortly after I drew and posted it. It was an oops at first but I figured I'd leave it as a simple land mine for the read and build students that dont actualy think about how the circuits they pull of chat sites to finish thier homework actualy work!
How many do you think copy and paisted it then tried to build it for an electronics class? Just to get beat down by a simple circuit?
To calculate the value of C 1 in your circuit is: Xc = 1/ 2pifc in ohms.
f is the frequency of your apply voltage i.e. 50hZ 230V and C is the value of the capacitor in Farads.