Power Supply Question

Thread Starter

thiha rarzar

Joined Jan 20, 2009
I want to make a powersupply for Led series lamp directly from 220vAC line.Can anyone help ?


Joined Apr 20, 2004
LED's need enough voltage to bias them into conduction, and then some means of controlling current through them. For safety, use a transformer to lower the voltage and isolate the circuit from the power line.

Different LED's take different voltages and currents. We need more information on the kind and number of LED's you plan to use.

Here is a link to our Ebook that talks about LED's - http://www.allaboutcircuits.com/vol_3/chpt_3/12.html