Digital Electronics The Multiplexer -

Digital Electronics - The Multiplexer - #162
Making a 4 to 1 multiplexer from gates and then a look at the 74xx151 8 to 1 multiplexer chip.
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[@daveturner5305]

Bill, you take me back to the early/mid 70s. Though I have to admit to messing about with RTL logic chips even earlier. I wonder how many folk have the slightest appreciation of how much has been achieved in the last x years.

[@edgeeffect]

I'm a big fan of multiplexers, I use 8:1 a lot to get more GPIO or ADC lines on microcontrollers... never thought of doing them with discrete logic and quite surprised how simple the digital ones are. Might be a different story for the analogue ones though??????

[@keithcitizen4855]

Nice demonstration

[@bobshifimods7302]

The output of the or gate has no knowledge of which of the inputs triggered it on.