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Questions tagged [multiplexer]

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A multiplexer selects one of two (or more) inputs based on a control input. It then outputs the selected input.

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What control (address, enable) voltages do i need if i want to drive a CD4067B that is powered with +/-12V? The datasheet is confusing. Is it 0V to VDD or is it VSS to around 0V? The part only accepts ...
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I need to measure the voltage from a precision analog circuit and apply this voltage to set open outputs of an analog MUX. To elaborate: I am designing a measurement system using a potentiostat to ...
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We have a case where the Mini PCIe plug-in card outputs a voltage (power) on the Mini PCIe 100MHz REFCLK+ line. This means instead of an input clock signal, this can also be a power output! This is ...
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I'm trying to design an audio source and output multiplexer/selector, to play audio from one of a few sources on one of a few output devices (so only one path active at any time). Everything will be ...
patpir's user avatar
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simulate this circuit – Schematic created using CircuitLab I am using several analog multiplexers to switch signals from a potentiostat to various electrodes. I am powering the MUXs with 0V and ...
JTreebs's user avatar
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I was asked to design a digital system that receives two inputs: X and X+2, and must output X+1, without using any adders or subtractors. (We weren't told what is the number of bits for X and X+2) I ...
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I am connecting TMUX1108 to electrochemical input of AD5941.AD5941 has only three GPIO pins.These GPIO lines will be connected to address lines of the MUX.No pin is available with AD5941 to control ...
Confused's user avatar
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I was asked to build a 16:4 priority encoder using 4:2 encoders. I’ve seen the solution with four first-stage P.E.s feeding a fifth P.E., plus two muxes. My problem is the intuition: When I connect ...
Ben Shaines's user avatar
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I have been studying the clock muxed from this source: https://vlsitutorials.com/glitch-free-clock-mux/ In this and many other websites, the clock mux is a flip-flop-based circuit. From what I ...
Erinç Utku Öztürk's user avatar
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I am designing a circuit board that will connect to a computer. As part of its functionality, I want to be able to select between multiple USB flash drives; but I'm not sure how to achieve this. I ...
Sod Almighty's user avatar
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I'm designing a PCB which acts as a USB 3.0 SuperSpeed device (so with an Upstream Facing Port IIUC). Is a Mux (like TI HD3SS3220) for SS lines/CC mandatory (to be a/ compliant and b/ allow the cable ...
ysu's user avatar
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I have two lower power (100 mW) transceivers, one 433 MHz one 915 MHz. I would like them to share a single dual-band antenna. In order to not damage the other, each transmitter's output needs to be ...
TSG's user avatar
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I’m working in Logisim‑evolution 2.7.1 and I have to implement a 64‑to‑1 multiplexer using ONLY the built‑in 16‑to‑1 MUX components (I imposed this restriction). The standard two‑level tree seems ...
Pizza's user avatar
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I am trying to build a circuit that takes one of two 5V inputs; it should output Vin1 if it is connected, and otherwise output Vin2. Here is an image of the circuit I designed using information from ...
JulesJ's user avatar
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I have five UART-based sensors from the same type which are continuously transmitting package at baud rate of 9600 kbps and every one second continuously (they have only TX and RX and power pins each)....
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...essentially related to Electronically connecting/disconnecting device from a CAN bus. I have a CAN bus (at 250 kb/s, not negotiable...) with 4-5 peripheral. For safety reason I have to completely ...
Lorenzo Marcantonio's user avatar
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Ok, this might be a silly question, but i'm kind of new to STM32 development. I am designing a custom board that, among other things, it communicates with eight array of sixteen independent boards, ...
langyns's user avatar
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I am designing a very complex PCB in Altium where 4 signals are demultiplexed out to 4096 endpoints each with some circuitry on the end. Due to the high frequency nature of these signals standard 2:1 ...
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I am planning to use ESP32 S3 for the communication with multiple SPI slave devices (10). According to the datasheet (https://www.espressif.com/sites/default/files/documentation/esp32-...
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Express the function implemented by the given circuit as a sum of minterms and write the result in decimal notation in the form F = Σm(...). Then, draw the circuit that implements the same function ...
Pascal's user avatar
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I want to create a device that runs on 2 power supplies; one from main power (14.6 V DC), the other from LiFePo4 batteries (4S: 14,6V). The device should control whether the load is fed through the ...
Barry's user avatar
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I cannot understand the operation of this component because of the different nomenclature assigned to it from what is on the datasheet. The truth table is quite clear, however, I ask for help in ...
KaleM's user avatar
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My goal is to control a grid of 100 small coreless DC motors (bidirectionally) using an ESP32. Each motor operates at my peak target RPM/torque with 6V, 200mA at 1khz PWM. I want to attempt ...
TVKid's user avatar
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I’m working on a PCB at the moment which has a pulse generator which generates 20 V, 1 μs pulses. I need to send this pulse to many different endpoints on the board which will each pull between 20 mA ...
Architectoid's user avatar
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I am trying to create a manual power mux using P channel Mosfets. The issue I am facing is that if both of the controls (logic state in the attached simulation) are turned off, the voltage is still ...
idontknow's user avatar
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I plan to use the LMH6586 to multiplex an MCU's GPIO pins as shown in the provided schematic. The 32 inputs will be connected to LEDs and buttons, while the 16 outputs will interface with 16 GPIO pins ...
A R's user avatar
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I am seeking advice on next steps for debugging my first PCB. It has a number of DRV2605L drivers from TI connected through a TCA9548A multiplexer. It simply hooks up 1 i2c port to 8 drivers to ...
SirRodney the Third's user avatar
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I'm a complete newbie to PCB design. For a university project, I need to choose the microcontroller I will use in my PCB (usecase : signal processing of an EMG bracelet). The most important ...
TheChade's user avatar
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I am trying to save space by breaking a single UWB antenna into multiple (N) antennas, each with a smaller range of frequencies. However, I do not want to have N inputs, just one so that a signal ...
pbhuter's user avatar
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electronics noob here. This is more of an educational project for me, so I would like to have some feedback on the design I put together. What I am trying to accomplish is a simple 2-in-1-out micro ...
milck's user avatar
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Hey all I am in need of some advice on how to go about doing the following: I have some 30 buttons I need to press programmatically. I know I can do this using a 4N25 but that would take up a lot of ...
StealthRT's user avatar
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I'm attempting to multiplex Neopixel data with weird readings on my Oscilloscope (I'm very novice to Electrical Engineering, so maybe it's a simple fix?). Here's my set up; I have a ring of 16 ...
moosetinkerer's user avatar
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I'm building a simulation control panel for a PLC, where one side is potentiometers simulating thermistors (14), and the other side is digital potentiometers, controlled via a computer. The PLC uses ...
Bangor Makerspace's user avatar
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I’m developing cable pinout tester with functionality of resistance measurement, but I’ve faced with some challenges. Using MCU (STM32) I want to go through all the combinations by selecting MUXs ...
SevRyb's user avatar
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1 vote
2 answers
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I am currently working on a homebrew single-bit computer from transistors (primarily NPN, as that's whats most described online, etc, but I'm not opposed to PNP either). To start off, I am a beginner ...
ThePlaneGuy45's user avatar
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2 votes
1 answer
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I'm working with a circuit that originally had three sensors with high-gain amplifiers for each sensor and worked great. The signal is AF. Only one sensor is ever used at a time. So, for cost and size ...
eromlignod's user avatar
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1 answer
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Background: I am designing a test board to measure the voltages from multiple point of the target board (DUT). I am using 2 pair of mux to toggle between the pairs. One mux (mux506ipwr from TI) is ...
Tay's user avatar
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1 vote
2 answers
903 views

I would like to request some help if possible with a USB 3.0 hub utilizing a USB-C port to connect to the host. The USB hub would have two downstream ports that can be used as USB3.0 and/or USB2.0. I ...
ElessarGR's user avatar
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1 vote
1 answer
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All pots are B10k. Any issue with my circuit? Something I should change?
frequency_abovetime's user avatar
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1 answer
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I am working with an 8x6 RGB LED matrix with common cathode LEDs on a PCB. I can select one column at a time by grounding its common cathode, and I source the current through the rows. The whole setup ...
Anvently's user avatar
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0 votes
3 answers
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I tried to make a 4*4 LED matrix and controlling it with an Arduino. With certain LED patterns ghosting occurs. On each row, the LED anodes are connected together and each row goes (from top to bottom)...
16-bit-apps's user avatar
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3 votes
1 answer
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I'm trying to make a digital chessboard. The design consists of 64 coils, one under each square. A microcontroller's PWM sweeps the frequency over a given range, such as 50 kHz to 350 kHz. The signal ...
Marsango's user avatar
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0 answers
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I need to flash 8 ARM Cortex M7 MCUs one at a time using a single J-link through SWD. From what I understand, the key pins to focus on are SWDIO, SWDCLK, and nReset, since ground and VCC are shared. ...
alasa995's user avatar
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-1 votes
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I want to switch/select between 3 voltage supplies (130 V, 105 V and 90 V). I want a fast switch around 1 microsecond fast therefore I am using MOSFETs (I could not find a fast enough mux which can ...
LKK's user avatar
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Given the instruction sd x12, 20(x13) (ISA RV64I), what are the inputs and outputs of the encircled MUX? My answer: if x[n] is ...
Sam's user avatar
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I am planning on creating a gameboard which uses NFC to read and write data to figurines on the tiles. So far my research has brought me a lot of info but nothing to really piece it together. For my ...
markb's user avatar
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1 vote
1 answer
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I am trying to design a keyboard with two USB-C inputs that connect to host. I decided on using a HD3SS6126 for switching logic. HD3SS6126 datasheet. I would like to make it so that when one of the ...
Miloš Bokšan's user avatar
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I recently finally got my PCB back for an I2C MUX board I built. The board has 4 TCA9548a MUXs that connect to their slave devices via screw terminals. I want to talk to embedded boards that all have ...
Beau Raley's user avatar
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1 vote
1 answer
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In a DEMUX, is it possible to route 1 input signal to multiple output signals? Say input I is routed to both output 1 and output 2. Does this scenario have anything related to data collision?
19216811's user avatar
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I'm wrapping up the firmware for my project using 4 TCA9548As to switch between 32 different ports for I2C slave devices. I have a raspberry pi and clamp on master SDA and SCL lines for master input. ...
Beau Raley's user avatar
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