author
1Instructables1,818Views3CommentschennaiJoined December 19th, 2013

Tell us about yourself!

Complete Your Profile
  • LED Bulb from Household Wastes.

    There is a formula to calculate the voltage and current.Reactance Xc=1/2*pi*f*CFor example, Xc=1/(2*3.14*50*0.47 EXP-6)Xc=6775Current I=V/Xc I=30maTo find Voltage:Vp=√2 * VrmsVp=1.414 * 240 = 339So, current is important here and we can add No. of leds in series based on their Forward Voltage. Also adding resistor to led will increase the life of the bulb.

    View Instructable »