Beginner - need help with simple led design

[jmc4713]

I'm new to this forum today so hello to everyone.

I'm building a project which requires 15 LED's, each with their own switch such that each LED can be controlled independently.

My question is, is there a way I could do this from just one power source?

If say I only had one LED switched on, I would not want it to be 15 times brighter than if all LEDs were switched on.

So is there a way to do this? If so, how?

My LEDs have the following specification:
Diode forward voltage: 3v
Diode forward current: 20mA

 

[BobK]

If you turn on only 1 light in your house is it 10 times brighter than if you turn on 10 lights?

Of course you can run 15 LEDs off a single power source. Each will need it's own current limiting resistor. And the power supply must be able to supply enough current when all of the LEDs are on, i.e. 300 ma.

Bob