The 4 to 1 Multiplexer is a logic circuit whose function is to select one data line from among 4. For this reason, many people refer to it and all multiplexers as data selectors.

BUILD! SAVE! SHARE! any elaborate circuits completely online. NO DOWNLOAdING IS NEEDED! And have access to your circuits 24/7.

This Johnson counter counts from 1 to 8. Johnson counters obey two mathematical relationships: 2 * flipflops = count; ANDs = count.

This type of Finite State Machine is a digital circuit that can add any two arbitrarily large numbers using a single full adder.

Given any two 4-bit signed numbers X and Y, the circuit is able to differentiate the following relations: whether X = Y, X > Y, or X < Y.

The hierarchy of flipflops: from RS fliplop to D flipflop to JK flipflop to Toggle flipflop.