Hi, this question is for a design course im taking, any help is aprecciated !!
My homework is about designing in a circuit the logical function : (A OR B) AND (C OR D) (being A,B,C,D our inputs; 10V or 0V )
From the boylestad theory circuit book; i took the OR and AND circuit (attached files)
We simulated the logical function adding leds to know what is happening in the circuits
Our big problem is that; ignoring the voltage that leds requires, our output voltage when has to be 10V its always like 5-6V (we know its because of R1 and R2 , But we dont know how to fix that)
We also noticed that our LED 5 and LED 6 are being powered when they are mean to not (when the inputs are 0 in example)
i think we have a problem connecting the AND with the two separate OR circuits, because the OR/AND gates works fine separately
i hope someone can clarify my questions, we are really rookie in circuits
PD: we changed the 1k ohm (from boylestad OR and AND circuits) from R1 and R2 because that way the Vo in R3+V5 was closer to 10, and also 220 was meaningful enough to dont mess up with the leds voltage
My homework is about designing in a circuit the logical function : (A OR B) AND (C OR D) (being A,B,C,D our inputs; 10V or 0V )
From the boylestad theory circuit book; i took the OR and AND circuit (attached files)
We simulated the logical function adding leds to know what is happening in the circuits
Our big problem is that; ignoring the voltage that leds requires, our output voltage when has to be 10V its always like 5-6V (we know its because of R1 and R2 , But we dont know how to fix that)
We also noticed that our LED 5 and LED 6 are being powered when they are mean to not (when the inputs are 0 in example)
i think we have a problem connecting the AND with the two separate OR circuits, because the OR/AND gates works fine separately
i hope someone can clarify my questions, we are really rookie in circuits
PD: we changed the 1k ohm (from boylestad OR and AND circuits) from R1 and R2 because that way the Vo in R3+V5 was closer to 10, and also 220 was meaningful enough to dont mess up with the leds voltage