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

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3
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2answers
42 views

Solid state device for switching (muxing) a bipolar high current signal

I'm looking into solid state relays for an application where I need to switch between two different transducers to allow two different modes of operation for an echo sounder. Basically a MUX that ...
0
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2answers
43 views

What is Vee on a 74hc4051 mux? [duplicate]

The 74HC4051 Mux (spec is here: http://www.nxp.com/documents/data_sheet/74HC_HCT4051.pdf) has 8 input/output pins labelled Y, one output/input pin labelled Z, three digital selectors S0, S1, S2, and ...
0
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0answers
18 views

implementing polynomial function circuit

Can I get some tips on how to implement the polynomial function (AK^2+BK) mod 256?? First of all, I will put 2 k's in the multiplier to produce 16 bit output, then should I put it into another ...
0
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1answer
32 views

Multiplexer with enable at a karnaugh map

We have multiplexer 2->1 with reverse enable: (sorry for the child-like graphics) the function table is the following e c Y 1 X 0 0 0 x0 0 1 x1 I tried to make a karnaugh map, ...
1
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2answers
41 views

Boolean expression of MUXs

I want to make sure I understand writing boolean expressions for MUXs. For F0, I derived the following boolean expression: \$\ F0 = S1’S2’(A’B + AB’)\$ from this circuit: Is this correct? If so, ...
-4
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0answers
23 views

4:1 multiplexer and 2:1 multiplexer

The question given as below: F1(A,B,C)=∑m(5,6,7) and F2(A,B,C)=∑m(0,6,7) Implement using 4:1 multiplexers and 2:1 multiplexers. 1.How can I implement them if I have 2 inputs? 2.How will be the ...
0
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2answers
47 views

Boolean expression with MUX circuits

Let's say I have a 4:1 MUX circuit of inputs: C--->...............................output: F2 C'--->........4:1 MUX........ C' --->............................. C ...
1
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3answers
68 views

Chain 16-channel analog multiplexer/demultiplexer

I'm trying to figure out how to chain six 74HC4067 or similar 16bit multiplexers. My goal is to read multiple analog inputs one after another with Arduino. I have only 1 analog pin input and 7 ...
0
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0answers
18 views

Implement 2 bit adder using 4:1 Multiplexer [duplicate]

How can i implement the 2 bit full adder using only 4: 1 multiplexers? I created a truth table for a two-bit full adder, which looks like this: I don't know how to do multiplexer folding and ...
0
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0answers
25 views

How do I use the CD4026 IC with a multiplexed 7-segment display?

I have 2 pcs. of 3 digit multiplexed 7-seg display (ELT-511SURWA) and 6 pcs of CD3026. I am building a frequency counter (CD4060 + crystal as timebase). I have considered using 6x UDN2983 + CD4017 + ...
5
votes
4answers
338 views

Making an ID of a board type

I want to make hardware ID of a board without using microcontroller or any kind of pre programmed eeprom. All boards of same type will have the same ID. One ID per board type. I was thinking of using ...
0
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1answer
39 views

Using BILATERAL SWITCH properly?

Summery: I am trying to figure out if I can use a bilateral switch as if it was a tiny relay capable of communicating UART signal, or are there things I am missing. Now, the long explanation. So, I ...
3
votes
1answer
98 views

Display Double Digit Numbers on 2 seven segment displays

I'm making an Arithmetic Logic Unit(ALU) for an assignment and I'm on a point. So according to my circuit design on the link shared below, I am able to output 1 digit of my alu. It is a 4 bit ALU so ...
0
votes
1answer
49 views

Correct 2 to 1 Multiplexer Truth Table

What is the correct way to write a 2 to 1 multiplexer truth table? In a couple of tutorials I've come across (1,2), the table is presented as follows: However, the same tutorials show the 4 to 1 ...
0
votes
1answer
40 views

Switch TENS unit between many channels

I would like to switch the output of a tens unit (one of those things that uses electricity for pain relief) to 8+ different outputs. I want to create an electro tactile device. The idea is to switch ...
0
votes
1answer
63 views

NPN or PNP for multiplex seven segment display?

I want to put three multiplexed seven segment displays on a pcb module which then will be connected to another board through a 1x12 Pin header housing an ATMega (so assume in the following that Pin 11 ...
0
votes
1answer
50 views

Interface 10 image sensors to Linux CPU

I need to process image data from 10 image sensors simultaneously (namely from OnSemi MT9V022s or similar). All 10 sensors will be externally triggered by a common signal. Ideal solution would be to ...
0
votes
1answer
55 views

MOSFET ORing behaving differently with fast slew rate on one of the Input rails

I am giving more details about the problem . pls read patiently. we are using p-MOSFET's ORing to do automatic switchover b/w @ 12V_External (comes from PCIE edge) and emergency battery. The circuit ...
1
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2answers
96 views

Is it possible to read a 10 by 10 switch matrix with 8 by 8 I/O pins?

I was asked this question on an interview: given 8 output pins and 8 input pins on a microcontroller, is it possible to read a 10 by 10 switch matrix without using multiplexor and demultiplexor chips? ...
2
votes
1answer
90 views

Assign I²C address to multiple devices on the same bus

I've got a couple of ADCs on the same I²C bus, which all default to the same address. My first instinct tells me to use an I²C multiplexer like the TCA9544A but that would require sending a byte to ...
0
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0answers
42 views

Constructing 16-1 Multiplexer from four 4-1 Multiplexers and a 2-4 Decoder

I have to show how to construct 16-1 Multiplexer from four 4-1 Multiplexers and a 2-4 Decoder. I tried creating 8-1 MUX from two 4-1 MUXes (using enable pin), but have no clue how to stack more MUXes ...
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0answers
38 views

Ideal multiplexers

I need thorough tests on different voltage biasing of an analog design. I figure all I just need to generate all combination of conditions (mostly voltage levels, some frequency) and port ...
0
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4answers
66 views

How does the OR gate work?

I'm asking this in reference to multiplexers where there are multiple inputs to the final OR gate. Say I have two different signals to an OR gate. One is at 4V and the other at 5V. So if I'm letting ...
2
votes
2answers
87 views

Did I hook up this CD4052 Analog Multiplexer correctly?

Upon reading the data sheet this chip seems straight forward, but I'm having the hardest time hooking up the CD4052. The chip I'm using is actually a, "CD4052BE". Here is a link to the datasheet. I ...
0
votes
3answers
70 views

Multiplexing 2 times 4 CC RGB LED's

I need to make 2 sets of 4 Common Cathode RGB LEDS. In each set of 4, every led must be individually addressable. It doesn't matter if both sets have duplicate outputs or not. (Although optimally they ...
0
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2answers
123 views

analog multiplexer CD4051BE

I want to test the analog inputs of a CD4051BE multiplexer, so I created four voltage dividers in order to measure four different values of analog input. I connected them to the I/O0 - I/O3 ports of ...
0
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2answers
35 views

2-to-1 Multiplexer logic equation: is order of inputs important?

The boolean logic equation for a 2-to-1 multiplexer is \$(A.\bar{S})+(B.S)\$, where \$A\$ is the first input and \$B\$ is the second input. Is this logic equation equivalent to \$(A.S)+(B.\bar{S})\$, ...
0
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1answer
33 views

OFDM with CSMA/CA

Most Wifi standards (e.g. 802.11a) use OFDM for orthogonal frequency multiplexing, i.e. assigning different subcarriers/frequencies to different users. On the other hand, it says CSMA/CA is used to ...
3
votes
1answer
57 views

Switching Serial Connections among several devices?

I have 3 devices that communicate via a serial port. Let's call them Device 1, Device 2, and Bluetooth (BT to serial adapter). The BT is used to communicate with a computer, but it can be treated just ...
0
votes
1answer
52 views

Multi-channel high frequency signal acquisition

I have to design a test bench for a device that has more than 1000 outputs. The voltage of these outputs will be about 10mV peak-to-peak, the frequency will be in the range of 100MHz (for the carrier) ...
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1answer
55 views

Is it possible to multiplex the same frequency (without bandwidth division)?

I have a range of bandwidth (e.g. [865,868] MHz) and more than one RFID tag I'd like to receive information from, over that range. How could I multiplex those ...
0
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0answers
127 views

7-1 Multiplexer Inputs

I'm a computer science student taking a required Computer Organization course so I'm very new to this electrical engineering stuff. I want to know how does one construct a 7-1 multiplexer? I know the ...
0
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2answers
75 views

multiplexing control signal on speaker cable

I need to put an alarm siren close to the location of one of my audio speakers. But I don't have a dedicated cable towards this siren. Because the alarm control unit is close to my speaker amplifier I ...
1
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1answer
82 views

TCA9548A I2C Multiplexer - 10k resistors on the address lines

I'm looking over the schematics and PCB layout of the Adafruit TCA9548A I2C Multiplexer breakout board. I've attached the schematic below. I cannot figure out why there are 10k resistors on the ...
0
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3answers
51 views

Multiplexer with 5v select and 9v or more routing

I need to route a 9v signal using a 5v or 3.3v microcontroller. Does anybody know of a multiplexer that supports this, or a circuit it could put in between the microcontroller and the multiplexer to ...
0
votes
1answer
27 views

Implementing a function using a mux and no gates at all

Given the function \$f(w,x,y,z)=x'y'z'+w'xy' \$, where \$ '\$ means negation. I was given this function from a mux \$2^3*3\$ - 8 inputs and 3 control lines. In the original implementation \$y'\$ was ...
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2answers
47 views

easy way to switch a signal

I have below configuration: ...
0
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0answers
66 views

74HC4051 Analog multiplexer settling time

I have simple schematic for multiplexing single ADC input to multiple analog inputs, made from LMV934 buffer and 74HC4051 analog multiplexer. The problem is, after selecting desired analog input, ...
0
votes
1answer
44 views

3 variable Kmap into 2-1 Mux

I am trying to figure out if I implemented a 2-1 Mux correctly based on a 3 variable K-map. my function states F(x,y,z)= Σm(0,1,3,6), and I have created a kmap as follows ...
0
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0answers
37 views

tradeoff of implementing MUX with some tristate buffers rather than AND OR logic?

Does anyone know the tradeoff of implementing MUX with some tristate buffers rather than AND OR logic? I know that one of the advantages of using tristate buffer is that it is easier to distribute ...
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2answers
152 views

What is the minimum size of multiplexer needed to implement any boolean function of n variables if we are given a multiplexer and an inverter to use?

The following is the solution given. We can use n-1 selection lines , and using 0,1 and nth variable and its compliment to realize the function So ans is 2^(n-1):1 I'm unable to understand how ...
1
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4answers
89 views

Does an ALU always do add and sub, but only returns one of the results?

Pretty simple question. Does an ALU internally always do multiple operations like add, sub, div, mul, ... and you simply have to specify which result you want to return? I was told that it does that, ...
1
vote
1answer
73 views

Is NXP's PCA9548A compatible with TI's TCA9548A?

I am using TI's TCA9548A in my Projects, but I would like to know if I can substitute it with PCA9548A from NXP. By comparing the datasheets this seems to be indeed the case, but I am wondering why ...
0
votes
2answers
85 views

Programmable gain instrumentation amplifier with R-2R ladder and analog multiplexer

I want to build a programmable gain instrumentation amplifier with power of two possible gains (1x, 2x, 4x, 8x...). Is there a way to use a R-2R resistor ladder and an analog multiplexer in order to ...
1
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1answer
55 views

OrCad issue: Logic circuit simulation…ambiguous output

After simulating the following logic circuit(in OrCad),the resulting output -'y' is unclear. It seems to me that everything is fine, yet the result is ambiguous. Can you, please, explain what is the ...
0
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2answers
89 views

Set multiplexer inputs to a logic 1 state

How can I set, in Orcad, all the entries of multiplexer(in the picture) (except: 1, 13), to logic state '1' (for example, I understand that if I place 'ground' to some entry, then it will be ...
0
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2answers
37 views

Lenient MUX and Load Signal

https://www.youtube.com/watch?time_continue=25&v=d3bF2v056WU http://i.imgur.com/ipDYgd8.png I'm going to ask about some names. You could say "they are just names" but if I get some context for ...
0
votes
3answers
186 views

Why is the output (in the truth table) inverted in a ic 74154 used as a demux?

I am studying Digital Principles and Applications from Malvino and Leach. I have a doubt in the demultiplexer section. This is the image of a 1 to 16 demux. I understand how it works. So, if ABCD = ...
0
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2answers
28 views

MUX Notation A vs B vs Cin vs S notation

Original video: https://www.youtube.com/watch?time_continue=76&v=AS17X2rcRKM http://i.stack.imgur.com/cByOK.png If A, B, and C_in are all select inputs, then why is C_in labeled differently? ...
0
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2answers
77 views

Nested I2C multiplexers

I want to provide 12 actuators from a microcontroller (Particle Core) over I2C. The problem is that the drivers for the actuators have all the same I2C addresses. So I'am considering to use I2C ...