Questions tagged [matrix]
The matrix tag has no summary.
161 questions
3
votes
4
answers
198
views
Negative base current for BJT During Mesh Analysis
I'm having trouble finding the base current for a BJT circuit that my professor gave me, with the assumption that the BJT is operating in forward-active mode. The problem is asking me to find the ...
- 304
0
votes
0
answers
96
views
Analyse of Multiplexing or fast scanning a large matrix of pressure sensors +1K sensor values
I'm going to scan a large matrix of pressure sensors, that are like a 2D Matrix of pixels.
The sensor is here:
https://www.tekscan.com/sites/default/files/dtl_DS_Sensor_Novus.pdf
The number of sensels ...
- 502
1
vote
1
answer
190
views
LTspice removes devices that are shorted out
As explained in this SE Q&A, LTspice removes devices that are shorted out.
Now LTspice does not add a series resistor to inductors if you couple it to another inductor, as in a transformer. In ...
- 155
1
vote
4
answers
160
views
Could someone please proofread my Hall effect sensor matrix?
I have designed this circuit schematic in Kicad, this is my first time using Kicad so this schematic is probably trash. Could you please point out the issues?
The circuit is the sensor matrix for a ...
- 21
3
votes
1
answer
264
views
Identification of pinout on RGB LED matrix display
First thing first. I'm a beginner at electronics, but I have an LED panel I want to use for a ESP32 project. The last couple of days I have been researching for at way to connect to this panel but ...
- 31
0
votes
2
answers
98
views
A matrix with anything?
I am looking for a way to control how hot a surface is using Peltier tiles. I had decided upon using a matrix of them (10 by 10 matrix to be specific). I know that by using shift registers I can ...
- 1,412
1
vote
3
answers
271
views
Feasibility of methods for nodal analysis of a complex RC circuit network
<Circuit 1>
simulate this circuit – Schematic created using CircuitLab
I need to perform nodal analysis on the <Circuit 1> and much larger lattice RC circuits. The resistance and ...
- 13
1
vote
0
answers
114
views
Nodal analysis using matrices - Wrong math?
I am attempting to solve a (not so difficult) circuit using nodal analysis
However I am getting 0V for half of my nodes, which is clearly wrong, the results violate KCL
Method
I am using nodal ...
1
vote
1
answer
61
views
How to find the matrix layout of an old EEPC keyboard
The title asks my question; how can I find the matrix layout of an old EEPC keyboard. I found an instructables about making a USB keyboard controller but it uses a Teensy microcontroller, and I think ...
1
vote
0
answers
56
views
RKJXT1F42001 Logic diagram
I'm looking into integrating an RKJXT1F42001 4-directional stick switch with encoder and center push function into a keyboard I am designing, but a little confused about the diagram. I want to make ...
- 31
2
votes
1
answer
267
views
Why are these diodes on the row inputs of this matrix keyboard with column pull-ups?
The following is the keypad circuit of a NEC TK-85 8085 trainer board. Port C-upper of the 8255 programmable peripheral interface is set to output, and you bring low the row you want to scan, leaving ...
- 1,078
0
votes
2
answers
121
views
The matrix of 8 Term Error model in Vector Network Analyzer Calibration
My teacher gave me a matrix , I do not understand it, not to mention to use it.
What is the relationship between b0, T1,T2,T3,T4 and b1.
The meaning of the "cross" the center matrix of T1/...
- 95
1
vote
2
answers
431
views
Li-Ion BMS which protects parallel cells in addition to series cells
Background
If li-ion cells are arrayed (series x parallel — S x P or P x S) to form a battery, it is generally recommended to manage parallel stacks of series cells (P x S) independently, such that ...
- 449
1
vote
0
answers
111
views
Electric-lock control via NMOS matrix
Currently I am working on the design that allows to control 8x8 electric lock matrix via PIC16F877A.
As in comments for somebody it was not obvious (btw it was mentioned) I am using 64 electric locks ...
- 13
0
votes
0
answers
75
views
Optimise matrix inversion in python for impedance calculation
To get the impedance profile for a circuit, I am using its admittance (G) and capacitance (C) matrices.
I am using python to compute impedance profile at different frequencies but the issue is that I ...
- 61