Use 4 Arduino pins for 16 outputs! Serial to Parallel Demultiplexer
Arduino Code: http://eeenthusiast.com/arduino-seria...
In this episode we will be taking a look at how we can easily drive up to 16 outpouts with only 4 pins. This is achieved through the use of a dedicated IC which is the serial to parallel demultiplexer SN74LS154N. By imputing a binary signal into this chip, it is possible to select which output will be driven. Watch the full tutorial to see how this is achieved in hardware as well as the Arduino.
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