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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Issue reading sensor values with CD74HC4067 16 Channel Mux
I'm running to an issue when measuring my sensor outputs. Previously I've connected my sensors directly to Nano analog pins and measured fine, but I want to use more sensors so trying a mux. Any help ...
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Using Analog Multiplexer CD74HC4067 with Circuit Playground Express
I am working on a school project requiring the use of the circuit playground express. I am trying to connect a bunch of external photocells to the cpx so that it will change the color of its lights ...
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Arduino Nano ADC input selection
The maximum ADC sample rate for the '328p, using the default prescaler of 128, is given as roughly 10000 samples per second. Maybe I've missed it, but I can't see whether that is the total rate for ...
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Connecting 3x 0.91Oleds (Using a TCA9548A 8-channel multiplex) and 1 1.51 Inch Transperant SPI OLED
As the title suggests, I have an Arduino Nano connected to a multiplex (which is connected to 3x 0.91 OLEDs) and an 1.51 inch OLED connected through an SPI.
The problem is that they just refuse to ...
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Photoresistor Matrix has the same values
I'm a second-year System Engineer student who needs to make a project for class.
I have a 4x4 matrix of photoresistors that goes to an analog digital multiplexer connected to an Arduino Uno. This ...
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Unable to read the sensor data from all the sensors connected
I am trying to build a project where I have connected 8 Sparkfun TOF Sensors to an I2C MUX which is connected to a Sparkfun RedBoard.
I need to read and display the data from each sensor on the serial ...
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Multiplexing three VFD tubes — why are the segments and the display timing incorrect?
I'm using an Arduino Nano, a UNL2803 IC, and three 2N3904 transistors to drive three seven-segment vacuum fluorescent display tubes (IV-6) in a multiplex configuration. The UNL2803 is used to drive ...
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Voltage reading problem in Arduino mega based 10 cannel battery capacity tester
I want to make a 10 channels Arduino mega-based battery capacity tester using 4.7 ohms 10w resistors controlling them with IRFZ44n MOSFETs with respected digital pins. An 8.4V battery powers the ...
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What size diode should I use?
I'm building a project with an ESP8266 which requires multiple analog inputs - but the ESP8266 only has one. I know of ways to multiplex with dedicated modules, but since I have lots of diodes lying ...
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Using CD74HC4067 16-Channel Analog Multiplexer Demultiplexer is not working as expected
I am working on a project that needs multiple digital signals and I am considering the CD74HC4067 (on a break-board) to work as a multiplexer. More specifically i am trying to build a keypad with ...
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Multiplexer 74HC4067, conflict between channels
I am currently working on an Arduino Zero with a 74HC4067 multiplexer and I am experiencing inconsistencies when testing some of the channels.
My class is the following (it should be functional for 8 ...
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How do I connect 20 outputs and 20 inputs to an Arduino board?
I am a mechanical engineer starting my journey with Arduino, so please excuse me if I put some very generalized message.
I need to sequentially operate 20 output relays, and then verify if the ...
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multiple mpu9250 using tca9548a with esp32
I'm using ESP32 and 1 sensor mpu9250(only for test) with tca9548a, connections are:
TCA <-> ESP
VIN - VCC
GND - GND
SDA - GPIO21
SCL - GPIO22
TCA <-> MPU
SD2 - SDA
SC2 - SCL
VIN - VIN
GND -...
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I can change value of only one register on 8-Bit Register integrated circuit (74hc273 / DM74LS273)?
First, please be patient, I'm not electronical person. I am learning Arduino and electronics for hobby and this is my fist time with integrated circuits.
Situation: I'm want to extend the Arduino ...
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Is it possible to read multiple buttons with the CD74HC4067?
I am working on a project with a claw machine. I am working on this chip (CD4067BE which is equivalent to the CD74HC4067) and I was wondering: can I read more than one button with the CD4067? I tried ...
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