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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Multiple MuxShield 2's connected to a single Arduino Mega

I am working on a project and need alot of toggle buttons to control various things around the house. I connected 5 MuxShield 2's to my Arduino Mega. The first two will serve as inputs and the last ...
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Arduino toggles on multiplexer not working

I am currently working on an Arduino project that needs alot of on/off toggles. Because my Arduino Mega does not have enough pins I connected 5 multiplexers to it (the MuxShield 2's). The problem is ...
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64 views

Arduino -> Processing conversion: creating mux channels

As the title alludes to, I'm in the process of converting an Arduino sketch to a Processing sketch. So far, mostly pretty straightforward. I'm running into an issue with creating an array of ints for ...
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Serial Hangs with multiple PN532 nfc reader and a TCA9548A

I am trying to use multiple PN532 reader. I have put all my readers on a multiplexer (TCA9548A). The script works well, but when I move my tags on readers sometimes the serial says to me there is an ...
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1answer
47 views

connected between 2 arduino

i want to connect SPI 2 arduino master and slave through the MUX , to write and read in external memory , when the master write in memory slave read . pls help . code to master #include <SPI.h&...
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RFID reader(125kHz) switching between antennas

My arduino application wants multiple separate cards in multiple separate (nearby) locations to be readable at roughly the same time. I am using a RDM6300 module, with a multiplexer to switch between ...
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111 views

How to read from multiple multiplexers (CD74HC4067) with a library

I need to read alot of buttons and analog inputs for my project (60 buttons 15 faders) and there fore need to use multiplexers. But most mux libraries seems to only support one mux, am i wrong?
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127 views

Using TCA9548A to read 30 ADCs

I want to read 30 differential ended analog sensors. Using ADS1115 16 bit this is possible, but we end up having only 4 address on I2C, so i chose TCA9548A breakout board with 8 I2C multiplex channels,...
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131 views

Can I hook up an Analog multiplexer to Arduino Nano?

I want to increase the analogue inputs for the Nano. So is it possible to hook up a CD74HC4067 analog multiplexer to it? Thanks.
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3answers
746 views

Why do the LEDs visibly flicker?

The aim of the project was to be able to show two "kinds" of LEDs in a 8x8 single color LED matrix. I used a MAX7219 chip to drive the LEDs using my Arduino UNO R3 as the driver (with the usual ...