I have asprin on stand-by for when someone tells me of an obvious solution. Usually, when this happens to me I smack my head because I missed something very obvious. Here is an example of the output data I'm seeing: I've tried various pull-up resistors and even voltage dividers to see if it's an issue.I get the same results if I set the binary address manually.I'm getting similar results with all modules I try.I've even tied all unused channels to ground with the same results. Placing 5 VDC or 3.3 VDC on the channel doesn't change anything.The program is setting the binary address properly.I've tried different modules, two different Uno boards, and wired and rewired everything multiple times. MuxValues=analogRead(0) // read the vlaue on that pin and store in array SetPin(i) // choose an input pin on the 74HC4067 Serial.println("Values from multiplexer:") dumps captured data from array to serial monitor connect 74HC4067 S0~S3 to Arduino D7~D4 respectivelyīyte muxValues = ĭDRD = B11111111 // set PORTD (digital 7~0) to outputs This is a breakout board for the very handy 16-Channel Analog/Digital Multiplexer/Demultiplexer CD74HC4067. see truth table on page 2 of TI 74HC4067 data sheet control pins output table in array form I've tried so many different variations on the same code I can't remember how many examples I've tried: It's everywhere so I copied it from somewhere: I can set it for 5V or ground and get the same crazy outputs. The data reported has little if anything to do with the input value. I'm using a 16-channel analog multiplexer breakout package based on the 74HC4067. Unfortunately, I can't seem to get the MUX board to work reliably. Of course, this will be a calculated resistance via a voltage divider. I'm working on a project where I hope to use an Uno R3 to make resistance measurements for a cable assembly. I picked this category because it had multiplexing in the name. You can either give them separate names or put them in an array: #include "Type4067Mux.Sorry if I posted in the wrong place. This is helpful in devices where there are only 1 or few analog pins. This module is used when you need to monitor multiple sensors or input devices on a single port. You can't have all of the objects named 'mux'. The CD74HC4067 is a 16-channel multiplexer. You can wire the ENA signals to keep the multiplexers enabled all the time. I would recommend connecting each SIG pin to a separate input. Yes, you can use one set of select/address outputs for all multiplexers. set the 4 muxChannel selection pins to switch to desired muxChannelĭigitalWrite(controlPin, muxChannel) Initialise the muxChannel selection pins * This example code loops through each channel of the CD74HC4067, reads the value, then prints the value in the serial monitor. Here is the example code (I tidied it up a bit) from the site (compiles, NOT TESTED!): /*CD74HC4067 example code S0-S3 and SIG of the chips would be wired to the SAME pins on the arduino. If you are going to use multiple chips, if it was me, I would wire EN of each chip to a different digital pin to select the chip I want to SIG to be switched to. Reads from channel i and returns HIGH or LOW.Īs you see here, the EN is put to ground. * Reads the 16 channels and reports on the serial monitor if the corresponding Waits for serial port to connect (needed for Leonardo only). * 4th-7th arguments are the Arduino PINs to which the S0-S3 pins connect. * 1st-3rd arguments initialize SIG pin (digital input on Arduino PIN 3). I would like to use for example this code: #include "Type4067Mux.h" Learn How to interface a CD74HC4067 16-Channel Multiplexer with Arduino. What would be the coding for that? I found some Librarys for the Multiplexer but with no information how to conenct them together. I want to connect some multiplexer to my Arduino.įirst question is can i connect all S0-S3 together and control them only with the SIG pins?
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