# Questions tagged [matrix]

The tag has no usage guidance.

109 questions
Filter by
Sorted by
Tagged with
46 views

### How to implement an interconnection matrix in VHDL?

I was reading through the documentation of the AXI standard when I came across the interconnection matrix shown below. In short, the interconnection matrix provides a path for several masters to ...
41 views

### Resistor Keyboard Vs Matrix Keyboard

I'm part way through my prototye macro keyboard which currently consists of 4 keypads with 16 keys on each - so 64 keys in total. The method I'm using is the 3 wire, resistor based one.R1,R2,R3 and ...
29 views

### Convert expanded boolean function into a switching matrix

I am given a boolean function f(x) that I have to develop them according certain variables, let's call them a0 and ...
32 views

### Suggestions to build high-power RGB LED matrix display

I'm building an 8x32 matrix display but it has to be high power so people can see it from 700 feet away. I can't use ordinary RGB LEDs (pixels)so enter image description here I'm using 3 watt pixels. ...
61 views

### How to control a matrix of electromagnets

I'm trying to design a matrix of electromagnets, but I'm having trouble on figuring out the control schematic. I need to control the 12V 70mA coils using an Arduino Uno (5V 40mA max output). ...
28 views

### Positive Definitness of Noise Covariance Matrix in Kalman Filter

I am reading a paper on Kalman filter and trying to understand measurement noise covariance and positive definitness of the covariance matrix. It is mentioned in the paper that if the matrix is ...
73 views

### Is this a valid matrix circuit, I've drawn it based on guides and examples online

I'm trying to build a matrix of 6 toggle switches 6 momentary buttons 4 rotary encoders I'm going to use a Pro Micro board and I'm wondering if my wiring looks okay, this is my first real ...
118 views

### How to individually control electromagnets in a 16x16 matrix?

I'm looking to be able to individually control each electromagnet in a 16x16 matrix. It's also important to note that I want to control these via an Arduino and maybe eventually a Raspberry pi - ...
35 views

### Multiplexing cell of matrix

in a project I am developing I have a matrix of cells, each cell containing 3 buttons (it will be more eventually, around 10). The schematic is like this: I want to read each one of the cells, and in ...
46 views

### Transfer function and graphic (Scilab error)

I'm trying to solve this problem with a Scilab code: I'm trying to follow this code, but in the step [b,a]=ss2tf[A,B,C,D], it shows the error ("Wrong number of ...
40 views

### Three Phase Voltage Measurement

I have matrix rectifier.However, I want to measurement phase voltage by ADC during not rectifying matrix rectifier? Can I measurement phase voltage with passive rectifier?
55 views

### Equivalent Circuit of identical transformers connected in parallel or series

I'm trying to figure out how to solve the equivalent circuit for 2 identical transformers connected in series or parallel on the primary and secondary. Mainly I want to know what the equivalent ...
61 views

### Is there a way to optimize this solution for closing two circuits with one button on a scale?

I am (as a hobby) looking into making a keypad with independently scanned keys. I am going with a row-column matrix approach (due to limited GPIO). And would like to utilize MCUs low power modes. Now ...
40 views

### Observability matrix different forms

The observability matrix formula is present in two forms in textbooks. My question is about which one to use. the first one: the second one: Now when applying both on the same system, I get ...
61 views

### LED Matrix design without micro-controller

I am working on a project concerning the creation of a LED matrix (4 x 6) but without using a micro-controller. It will be powered by a 13V battery and the leds will be controlled by a switch. My ...
103 views

### How to use two Demux to index a matrix layout of registers

Consider the following. Let's say for simplicity sake I have an arrangement of 8 bit registers in a 4x4 matrix layout. I could easily use a Demux that has a 4 bit input select line for the addresses ...
45 views

### Controlling a 19x19 input matrix

I'm designing a go board that can detect where pieces are placed through a raspberry pi for the purpose of game recording. I'm planning to put magnates on the bottom of pieces and do the detection ...
114 views

### What will be minimum number of states / state variables for these control systems in state-space model?

Consider the systems as LTI and SISO with transfer functions given below: I have read that minimum number of states for an LTI SISO system required to represent in state space analysis for any ...
36 views

### Why is any general cutset equation a linear combination of fundamental cutsets?

I have currently started studying circuit theory and my professor introduced graphs to form kvl and kcl equations. When we form the cutset matrix using fundamental cutsets it is easy to understand ...
85 views

### BCD4511 Seven Segment Display Decoder + Diode Matrix

i'm having some issues trying to get a circuit to work that i have found on, yes, the infamous instructables. It consists of a diode matrix that goes to the inputs of a BCD4511 decoder IC. It's ...
37 views

### How to convert T matrix to Z matrix in two port network?

How can I transform a T matrix to become a Z matrix for a two-port network? I found the following conversion to get the T matrix from Z matrix from here : https://www.tutorialspoint.com/...
126 views

### Matrix of small incandescent lightbulbs - problem with buzzing

I am prototyping a circuit for controlling matrix display of small incandescent lamps with Arduino (each lamp is 6.3V 0.3A). I designed the circuit in Yenka and built it. It is composed from 3 types ...
95 views

### Node analysis with voltage source in matrix form

simulate this circuit – Schematic created using CircuitLab Can you please check if my reasoning is correct? The sum of currents leaving node k is:  I_k = \sum_{i = 0}^{n} I_{ki} = \sum_{i = ...
703 views

### Finding Z-parameters from a two-port network and using them to find S-parameters

So I have the two-port network and I want to find out the Z-parameters of it (and later, use that to find the S-parameters). For the assignment, $R_x=8Ω$. From what I understood, I should null ...
43 views

### s-parameter matrix analysis

So I'm trying to figure out how I can analyze S-parameter matrices. The i. should be pretty straightforward, though I'm not 100% sure if I am correct with what it means. I'm assuming that there's ...
72 views

### Row Column Matrix Problem with Flyback Diodes

So I had a simple row column matrix which I am driving with mosfets to power solenoid locks like this: GC is ground via 1.5k resistor C is 24V via 1.5k resistor And these are the connectors: ...
70 views

### Can I in any way connect +ve side of my led to uln2083a output pin?If no can I do it with M54562 transistor array?

I had conneced my digital pin of arduino to the uln2803a to drive LED. I want to configure my uln2803a such that i can connect +ve side of the led to the output pin of uln2803a IC.
93 views

### Unusual behavior when controlling a Button Matrix

I have a 4x4 matrix for 16 buttons. Each row/column is directly connected to the pins of an unknown microcontroller. When I connect the pins directly to each other, the microcontroller behaves ...
114 views

### How to solve a circuit network involving a resistor parallel to a voltage source using only nodal analysis?

I have been stuck on this for the past week and this week i just dont seem to find out what am i doing wrong. Please help me spot my mistake. Here you can find My circuit on multisim. Please provide ...