Hi All,

For every question you have one right answer and one wrong answer. If you choose right answer GREEN LED should lit, and for wrong answer RED LED should lit. But we all know some naughty kids try to select question 1 and select answer from other questions, then in that case tooo I want RED LED to be lit.

Can you all please take a look at the attached files and tell me if the circuit and selection of parts work ?

I greatly appreciate your help. Thanks in advance.

cheers
MK

 

1. Are there resistors in series with the LEDs, or are they just rated for 6VDC with built-in resistors?
2 The red LED is always ON unless the correct answer turns OFF and turns the green one ON?

If you're interested, there is another thread on this forum on the same subject:http://forum.allaboutcircuits.com/t...ndicates-right-answers-and-wrong-ones.122274/

Ken