How Do You Build a Circuit Using a 4:1 Multiplexer?

[transgalactic]

build the circuit of
http://img517.imageshack.us/my.php?image=img86381xv6.jpg

using 4:1 multiplexer

i don't know what the plus meens
i know that the second after the plus is the don't care group
but i don't know how to solve it

i wrote a unified truth table for both groups
http://img187.imageshack.us/my.php?image=img86411ml5.jpg

how do i build a circuit??

 

[berkeman]

Hmm, that's a challenging one. I think you've done the correct job of making the K-map, and now you need to play with different combinations of what to make the don't-cares, and what you can do with a 4:1 multiplexer. Your 4:1 MUX actually has 6 inputs and 1 output, right? There's the 4 inputs to the MUX, plus the 2 selector lines. So look at some variations of the truth table with different configurations of the X values (don't cares), and see if the simplest truth table variations are amenable to using a 4:1 MUX to form the outputs of the truth table. I haven't solved the problem myself yet, but that's how I would approach it.

 

[piercas]

Building a circuit can be a complex process, but with the right tools and knowledge, it can be done successfully. In order to build the circuit shown in the image provided using a 4:1 multiplexer, you will need to follow these steps:

1. Understand the circuit diagram: The first step is to understand the circuit diagram and the components involved. In this case, we have a 4:1 multiplexer, which has 4 inputs and 1 output. The inputs are labeled as A, B, C, and D, and the output is labeled as Y.

2. Analyze the truth table: The next step is to analyze the truth table provided and understand the logic behind it. The first two columns represent the inputs A and B, while the third column represents the output Y. The fourth column, which is labeled as "don't care", is used when the inputs A and B are both 0. This means that the output Y can be either 0 or 1, and it does not affect the overall logic of the circuit.

3. Connect the inputs: Using wires, connect the inputs A, B, C, and D to the corresponding pins on the 4:1 multiplexer. Make sure to follow the correct order of the inputs as shown in the circuit diagram.

4. Connect the output: Connect the output Y to the desired output pin on the 4:1 multiplexer.

5. Connect power and ground: Every circuit needs a power source and a ground. Connect the positive terminal of your power source to the Vcc pin on the 4:1 multiplexer, and the negative terminal to the ground pin. This will provide the necessary power for the circuit to function.

6. Test the circuit: Once everything is connected, it is important to test the circuit to make sure it works as expected. You can use a multimeter or a logic analyzer to check the output values for different input combinations.

Overall, building a circuit using a 4:1 multiplexer involves understanding the circuit diagram, analyzing the truth table, and properly connecting the inputs, output, power, and ground. It is also important to test the circuit to ensure its functionality. I hope this helps you in building your circuit successfully.