The 74HC151; 74HCT151 are 8-bit multiplexer with eight binary inputs (I0 to I7), three select inputs (S0 to S2) and an enable input (E). One of the eight binary inputs is selected by the select inputs and routed to the complementary outputs (Y and Y). A HIGH on E forces the output Y LOW and output Y HIGH. Inputs also include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of VCC.
“It’s time to present a relatively simple yet useful device: the Universal Interface. The need for this little helper arised when building the control for my CNC milling machine. But that’s a major project that I will introduce …
“Alternative for the 74LS181 ALU, built in One Square Inch An ALU was designed with only 7 IC’s. Its functions are ADD, SUB, XOR, XNOR, AND, OR, A, B, NOT A. It has a fast carry output. It can …