modified 10 years ago

how to use a led diode with a resistor in series

00:56:07

Remember led diode always have specific voltage and current so you have to choose the correct resistance so the diode will work correctly. 

To fine the correct resistor,  we have first to subtract the voltage from the led diode that is in this case 3.5 so we subtract the power supply of 9v-3.5= 5.5volt

So after we have the correct volt now we use the ohms formula to fine the resistance value. Now that the diode also has 20mA so we divide 5.5 volt/ 20mA= to have the correct resistance of 275 ohms 

In this case we use the current of the led diode in the entire circuit. 

All of this circuit is create by Jenko022 on via youtube

published 10 years ago

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.