Ximimark 5Pcs 16CH Analog Digital Multiplexer Breakout Board Module CD74HC4067 CMOS Precise Module For Arduino

Cheap and all working

These CD74HC4067 multiplexer breakout boards are excellent for projects where you need to expand I/O without adding extra microcontrollers. Each board gives you 16 channels that can be used for either analog or digital signals, and they’re easy to address with just 4 control pins. The breakout design makes wiring straightforward—perfect for breadboards or jumper setups. I’ve used them with Arduino and ESP32 boards, and they’ve worked flawlessly for reading multiple sensors and inputs. The signal quality is clean and precise, and switching between channels is fast and reliable. The fact that you get 5 boards in one pack is a great value. It allows scaling up to big projects like keypads, control panels, or large arrays of sensors. Build quality is solid—the pins are well-aligned, solder pads are clean, and the boards feel sturdy. If you’re working on projects where pin count is a limitation, these multiplexers are a must-have. Highly recommended for hobbyists, students, and makers looking to simplify large input/output projects

These are great used a couple to make midi controllers. Mine all showed up on time packed ok and they all worked so that's great. Will get more when I need more.

I like these a lot, OK quality at a good price and does what its supposed to. The board edges are very rough and you'd need to sand them down. Then, depending on what your application is and required timing, you wont be able to switch inputs faster than about 3khz. There is a 100ns delay on switching on and off. and switching off will distort your signal at the tail end during that 100ns delay. So - if you are using this you should bargain on your signal being delayed 100ns at the onset and ignore the last 100ns at the offset. for 99% of the applications, this is not going to be an issue at all.

I verified counting through binary numbers 0-15 selects outputs C0 through C15 in order. One reviewer claimed some pins were swapped, but that was not the case for the ones I got. Measured resistance was about 55 ohms for all paths, so it's well within spec.

Two of the boards were dead. I was able to get one to half-work, but not good enough. I will be throwing these in the trash. I am more frustrated at the lost time than the money.

Got these for an audio device I was building, then they sat around for a couple months before I ran out of digital pins on my ESP32 board and remembered these boards can do digital as well as analog. 4 pins from the board gives you 16 - of course, you can't use more than one at a time, but there's plenty of applications I've found for it. They're just good to have around.

Multiplexers are awesome. What can I say.

Simple pcb, items received had red board but works the same.