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Task 1: One implementation of a multiplexer uses a decoder. Using Logic Circuit,create a new schematic, import one of the decoders created in a previous lab and create a logic dircuit that implements the truth table below Task 2: Create a logic circuit that can display two 4-bit digits on two 7-segment displays using a single 7- segment display decoder and 4 multiplexers. To do this you will use four switches to enter the first number, and a second set of four switches to enter the second number. The first set of switches will connect to the 00 input on the four multiplexers. The second set will connect to the D1 inputs on the same multiplexers. (In this task, nothing will be connected to D2 or D3) The clock signal will be used as lab. Connect the output of the multiplexers to the inputs on the 7-segment display decoder. Connect the output of the decoder to two 7 segment displays. Use the clock to enable one display when it is high and the other when it is low. (Hint: a fifth multiplexor maybe helpful here) Task 3: Connect two additional 7 segment displays to the output of your decoder. Connect the first set of switches to the D2 inputs of the multiplexers, but in reverse order from task 2. (eg. if SWO was connected to MUXO and SW3 was connected to MUX3, then SW0 would connect to MUX3 and SW3 would connect to MUXO) Similarly, connect the second set of switches to the D3 inputs of the multiplexers. At this point, all four inputs of the multiplexers should be connected. Connect a single button to the second select bit of all the multiplexers. When this button is pushed, disable the two digits that were displayed in task 2 and allow the clock to enable one of the two previously disabled digits
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