Adam Meyer Arduino Cd74hc4067 The cd74hc4067 is a super simple to use bidirectional mux that can make your life a lot easier. so please, put this to good use, and don't let me see you controlling 16 leds with it. article taken from bildr.org with minor changes i am the original author of this content. Adam meyer | arduino. from 2010 2012 i wrote 60 articles detailing how to connect various parts to an arduino for bildr's blog. for archival purposes i have decided to host them on my personal site mostly unmodified.
Adam Meyer Arduino Cd74hc4067 Now, we’re ready to create our first arduino project with the cd74hc4067 analog multiplexer. in this example project, we’ll use the cd74hc4067 to extend 1 analog input pin of the arduino (a0) and make it accept up to 16 different analog inputs. for the sake of circuit simplicity, i’ll only use 4 analog channels of the cd74hc4067 module. The innovations id series of rfid readers come in 3 versions, the id 2, id 12, and id 20. all 3 versions have the same pinout and work exactly the same. they all operate with common 125khz tags. in fact, the only difference is the antenna. the 2, has no antenna and requires an external one to work, the 12, a smaller antenna, and the 20, a. Step 1: circuit. the following circuit shows how you should connect arduino to cd74hc4067 module. connect wires accordingly. then you can connect the desired analog inputs to pins c0 15. to test the performance of the circuit and code, you can use a voltage divider according to the following circuit. I am trying to use the cd74hc4067 multiplexer along with push buttons. the idea is to have 16 push buttons and use as least pins possible on the arduino. i found some guides for using cd74hc4067 but all of them seem to focus only on output to the 16 channels instrad of using the 16 channels as inputs.
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