NOOB Multiplexing 16 potentiometers - moving one pot changes all values

Other Hardware LEDs and Multiplexing
1

Hi, first time multiplexing and am ready to rip my hair out. Could really use a hand :frowning:

So I got some 74HC4067 multiplexers in the post this morning and am having some trouble working with them. My problem is that I'm getting wildly inconsistent values; moving various pots seems to have a random chance of doing anything. When it does actually increase the value, most of (if not all) the other pots values increase too.
Example here when I rotated the pot on channel 15 to full: Pot Values - Album on Imgur. While I am still new to this I think I'm right in saying that I should be seeing this at 1023 while everything else stays close to 0???

I've tried this with everywhere from 2 pots all the way up to the 16 I currently have setup. Also have taken everything down and set it back up more times than I count. My setup diagram: Multiplexing Problem - Album on Imgur (black box is the multiplexer since tinkercad doesn't seem to have a mux object...).

Codewise I just copy and pasted codebender's MUX74HC4067 readAnalogSignal tutorial.

All pots are 10k. I have 4 of the 74HC4067s and have swapped them out. Getting the same issue so I don't think it's a problem with them. Thanks in advance

2

Never mind, either a dodgy mux or dodgy cables (probably the former since I swapped out all cables). Tested with just 2 pots and applied a bit of pressure downwards on the pins going into it (even though they're seated fairly snugly) and they started showing.

3

I'm glad you got it sorted because there was no way for us to help you, from your post. Next time you need help, please read the forum guide first.