2 cleanup schematic a little
source | link

I am new to electronics and creating my first big project but I am stumped on figuring out the value of the base resistor (R2 in diagram) of an NPN 2n3904 transistor. All of the LED are rated for 20mA. I have done a lot of research but the more look in to it, the more I am confused. Any help on this issue would be greatly appreciated!

schematicschematic

simulate this circuitsimulate this circuit – Schematic created using CircuitLab

I am new to electronics and creating my first big project but I am stumped on figuring out the value of the base resistor (R2 in diagram) of an NPN 2n3904 transistor. All of the LED are rated for 20mA. I have done a lot of research but the more look in to it, the more I am confused. Any help on this issue would be greatly appreciated!

schematic

simulate this circuit – Schematic created using CircuitLab

I am new to electronics and creating my first big project but I am stumped on figuring out the value of the base resistor (R2 in diagram) of an NPN 2n3904 transistor. All of the LED are rated for 20mA. I have done a lot of research but the more look in to it, the more I am confused. Any help on this issue would be greatly appreciated!

schematic

simulate this circuit – Schematic created using CircuitLab

1
source | link

Base resistor on transistor

I am new to electronics and creating my first big project but I am stumped on figuring out the value of the base resistor (R2 in diagram) of an NPN 2n3904 transistor. All of the LED are rated for 20mA. I have done a lot of research but the more look in to it, the more I am confused. Any help on this issue would be greatly appreciated!

schematic

simulate this circuit – Schematic created using CircuitLab