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Questions tagged [multiplexer]

A multiplexer lets you select one signal out of a group of (typically) 8 or 16, for both input and output purposes. Use this tag for discussing multiplexer chips.

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How to use a common anode 7-segment, 4-digit display?

Please take this question as an example to (my own) answer below. I've got an 7 segment, 4 digit LED display, but I don't have any idea on how to wire it. I don't understand the difference between ...
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2answers
2k views

How to code for cascading multiplexers?

I hope I can get some help on how to get this to work. I have multiple Sensors (32 of these) which values I want to read. I am using a master multiplexer HC4051 connected to 4 slave multiplexers, ...
5
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2answers
11k views

Multiple I2C sensors with the same address

I am trying to find the simplest way to connect multiple (preferably around 10-20) IMU sensors to one controller. There are two constraints: sampling at 60Hz and reasonably simple wiring as I want to ...
2
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2answers
816 views

Interface with mux-controlled LED rope

I'm working on using a GUI in Processing to control some LED rope from Adafruit, and using this multiplexer. I've gotten the following Arduino code working the way I want to cycle through the various ...
3
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2answers
956 views

Need help with 2X3 matrix for braille

I'm an intermediate Arduino progammer, and I'm making an electronic braille display for my friend. You can think of this display as an array of 28x3 LEDs(one braille character contains a maximum of ...
5
votes
1answer
214 views

Working with multiplexers for constant voltage output

I'm working on creating a circuit where I'm trying to have the ability to switch multiple strands of LED rope on and off at a time using an Arduino and a multiplexer. With my current configuration, ...
3
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1answer
1k views

PWM multiplexing on Arduino nano

simulate this circuit – Schematic created using CircuitLab Its a simple project. I am trying to drive 3 RGB LEDs using Arduino Nano. Since Arduino Nano does not have 9 PWM pins, the only ...