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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Why is Serial.begin(9600) interfering with my multiplexor functioning?
I have an Uno hooked up to a sparkfun 8 channel multiplexer (https://learn.sparkfun.com/tutorials/multiplexer-breakout-hookup-guide). I have it wired up like this:
Arduino0 --> S0
Arduino1 --> ...
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23 views
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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18 views
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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2answers
71 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 ...
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33 views
Using two references in the same ADMUX
I'm making a project and I neee to use 2 different references on the same ADMUX. One reference is 0-5V and the other is 0-2.5V. I'm aware that I can use the reference of the Arduino to the 5V sensor. ...
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36 views
Why does the current drop through a multiplexer?
I am trying to control 64 leds through a number of 8:1 analog multiplexers. The input is from pin 11 on the Arduino which is giving 40mA (maximum) and it is pulsed at 38kHz. Then I use other pins to ...
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2answers
57 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, ...
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10 views
How to code for cascading multiplexers? [duplicate]
I hope I can get some help on how getting this to work.
I have multiple Sensors (32 of these) I want to read their values. I am using a master multiplexer HC4051 connected to 4 slave multiplexers, ...
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1answer
53 views
Connecting multiple TFT panels to Arduino Uno via SPI?
Is it possible to connect more than one TFT screen (like this one or similar: https://www.adafruit.com/products/1651) to an Arduino Uno?
I'm wanting to connect and control two color screens at once; ...
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1answer
53 views
I/O expander with i2c interface vs Multiplexer
I am wondering where are the difference in between using something like:
CD4067, which selects which pins to read/write from by "selecting" an address with 4 pins by writing to it. Versus the MCP23017 ...
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44 views
Switching Many Switches with one Input
I have a situation where I need to select between two signals, lets say 1A or 2B and route it to output 3C. I need to do this six times (2A or 2B to output 2C, 3A or 3B to output 3C, etc.).
These all ...
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2answers
78 views
Driving Numerous Chips from 2 Separate SPI Connectors w/ Arduino Micro
I want to drive numerous chips (L9823, TLC5925, ADG1414, MCP23S08) from an Arduino Micro as well as read input from analog pins connected to momentary buttons, toggles, potentiometers and such. The ...
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33 views
Managing 80 ~ 90 accelerometers with Arduino
If one were to want to keep track of data from 80 - 90 accelerometers using arduino, what would be the best way to go about this challenge?
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2answers
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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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1answer
397 views
Multiple MPU9250 using Multiplexer
Anybody here have tried connecting multiple MPU9250 into multiplexer. Anyway, I've used the HD74LS151 as the substitute for the 74HC4051 multiplexer. I already tried running the program and just ...
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1answer
73 views
Reading sensor data over MUX
I will start by saying I am very new to using Arduino. The project I am planning is to create several arrays of sensors (each array will consist of 4 DS18B20 sensors and one temperature/humidity ...
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1answer
138 views
Using 2 RGB lights over Bluetooth with a DigiSpark
I'm not that experienced with electronics but I am learning. And I've set a challenge for myself. I have a Digispark USB Development board (and many more but I want to use this one!), I have a ...
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1answer
576 views
Issue with CD74HC4067 MUX on high values
I'm having a small issue with the CD74HC4067 multiplexer/demultiplexer: I am using it to receive data from an array of sensors (at the moment I have only 2, but in a near future they will grow). ...
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1answer
363 views
Arduino + 4051 -> noise on certain 4051 pins
I am trying to use two 4051 ICs with an Arduino Micro right now. The idea was to have an 16-sensor demo station (8 sensors per 4051) wherein each 4051 pin selection is controlled by a potentiometer as ...
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3answers
168 views
How can I turn this into an (Ableton) controller?
I found this lovely decade box in a demolished house recently and want to turn it into an Ableton controller. As you see, there are 18 knobs, each with 12 individual states.
I'd like to have a ...
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5answers
168 views
Suggest me an Arduino development board, with a removable ATmega chip?
I want to buy an arduino development board which has facility to remove its chip and insert a new one anytime. I want to use multiple chips in a single board for different purposes.
If it is not ...
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1answer
67 views
Good tips for how to connect cables into Mux Shield II?
I just got a Mux Shield 2 and got it working as I expected. Now I started to find out how to actually connect the I/O cables to the board. Doesn't seem to be as simple as I thought. I don't want to ...
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2answers
218 views
Use Adafruit 16-Channel 12-bit PWM/Servo Shield to switch relays
I'm wondering if using the Adafruit 16-Channel 12-bit PWM/Servo Shield is it possible to switch relays, such as use that shield as a multiplexer and use digital output without PWM.
Is it possible? ...
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1answer
78 views
Multiplexing help for relay and pwm
I have to control with an Arduino UNO and xbee shield:
9 5V relay
9 RGB LED
What kind of multiplexing can you advice me? Do I have to use external power supply (like 12V DC external from arduino or ...
