modified 10 years ago

Led is not emitting.... what is the reason

01:41:17

Led is not emitting.... what is the reason? if anyone helps me out

published 10 years ago

sandfree

10 years ago

The source voltage and the circuit currant very weak to activate the diodes. Look the diodes configuration parameters. (20ma) (12v) make it ( 1ma and <3V) and Change source voltage to 5v, the diode must emitting

ferlop

10 years ago

You only need one resistor of about 150 ohm, power supply 5 volts, led set at 2 volts. see examples.

Harrom

10 years ago

Thanks a lot

MosfetSpaceport

10 years ago

Contrary to popular belief, an LED (although it is technically a diode) cannot withstand reverse current in excess of about 20uA), or so. This will vary from Diode to Diode, but you need to check a datasheet for reverse breakdown.

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.