Transistor as switch

is this correct?

Lol... The layout is fine providing you alter it as per my link here, You do have a suitable current to feed the LED. The two resistors are in parallel feeding the base. Now in the revised schematic....Switching either one of them on gives enough base current to saturate the transistor and so switch on the LED. Switching them both on results in an overall halving of the total resistance with a doubling of the total current passing....so even more current doing just the same saturation job. Current is basically being wasted through these resistors, since you only need microamps at the base, whereas you have got quite a few milliamps. You could remedy that by increasing the resistor values. Having two resistors is not serving any useful purpose...one would do....If that is homework done, then I hope you have learned from it !  http://everycircuit.com/circuit/4617928206188544

Funny how you like the layout but do not realize how the resistors are connected. Somehow the layout is irritating you a lot. 2cent sit down and read the original circuit again LOL

The resistors are connected in parallel...just like I said...LOL

But they are not connected at 12V. Reading schematics is a fundamental ability to understand circuits.

My revised schematic as described has both resistors in parallel from 12v at one end with the other end to base...you ar looking at the rbnsn22 schematic instead of my advised revised schematic...read it all again.

In your its wrong from 12V which lets you conclued wrong the transistors are going into saturation. His circuit can NOT drive the transistor is saturation. Everytime you take a circuit here on EC you add up one more misstake, cuz your errorrate is somehow high!

Look at the current through the Amp meter which is shown at the base in my schematic link...11mA for one switch and 22mA if both switched on....that saturates the transistor and gives full collector current subject to the 500 ohm LED resistor restriction....How would you describe my schematic action and how would you describe the two resistors which I say are in parallel there?

Its not your circuit and your problems which are topic of HIS circuit. Mr Messy do not mess up foreign circuits.

We all await the day when you admit to a mistake such as here . It takes courage to admit mistakes and you are permanently seen as never being able to do that....sad case Hurz

Who cares what you are awaiting for. But take the time and learn to read and understand foreign schematics. And dont mess them up to much

To the OP: Why do you want your switches on the opposite side of your led+resistor?

Cuz its the most efficient side to place it low side as common emitter.

many thanks for the help.. having someone to argue with is much helpful because of sharing of knowledge.. we will tackle this lesson soon and i've learned a lot from you guys :)