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Is it possible to implement this circuit operation?

  1. Sep 30, 2015 #1
    1. The problem statement, all variables and given/known data
    When switch A is turn on , LED 1 will light up When switch B is turn on , LED 2 will light up. When one of the LED is turn on , all other LED will not turn on. When the LED is turning on and if you are to press another switch , it will have no effect at all. what I mean is no other LED will turn on

    In this project , I am only allowed to use the following component.
    opamp , zener diode , led , resistor , capacitor , p or n mosfet , NPN BJT or PNP BJT , diode , temperature sensor , LDR , speaker , trimmer , switch(normal) , pusb-button switch , infra red emitter , red detector
    .

    2. Relevant equations


    3. The attempt at a solution
    Is it possible to form a digital logic circuit using diode and resistor?
     
  2. jcsd
  3. Sep 30, 2015 #2

    Daz

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    Yes - it's called RTL or resistor-transistor logic. (wikipedia has it covered.)
     
  4. Sep 30, 2015 #3

    phinds

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    Uh ... Daz, how to you jump from the question about diode/resistor logic to resistor/transistor logic? They are not the same thing.
     
  5. Sep 30, 2015 #4

    phinds

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    No, but since you are allowed to use transistors you don't have that problem.
     
  6. Sep 30, 2015 #5

    Daz

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    I misread - that's how. Oops. Anyway RTL or DTL would do.
     
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